Directory of Researchers

TAGAWA Masahito
Graduate School of Engineering / Department of Mechanical Engineering
Associate Professor
Aeronautical Engineering
Last Updated :2022/08/09

Researcher Profile and Settings

Affiliation

  • <Faculty / Graduate School / Others>

    Graduate School of Engineering / Department of Mechanical Engineering
  • <Related Faculty / Graduate School / Others>

    Faculty of Engineering / Department of Mechanical Engineering

Teaching

Research Activities

Research Interests

  • Space Environmental Effect

Research Areas

  • Aerospace, marine, and maritime Engineering / Aerospace engineering

Committee Memberships

  • 2018, 15th Spacecraft Charging Technology Conference, 現地実行委員会委員
  • 2018, International Symposium on Materials in Space Environment -14, プログラムコミッティーメンバー
  • 2018, International Conference on Protection of Materials and Structures from the Space Environment-12, プログラムコミッティーメンバー
  • 2015 - 2017, (社)日本航空宇宙工業会, 「耐原子状酸素コーティング国際標準化検討委員会」委員長
  • 2015, International Symposium on Materials in Space Environment -13, プログラムコミッティーメンバー
  • 2014, International Conference on Protection of Materials and Structures from the Space Environment-11, プログラムコミッティーメンバー
  • 2012, International Symposium on Materials in Space Environment -12, プログラムコミッティーメンバー
  • 2011, International Conference on Protection of Materials and Structures from the Space Environment-10J, 実行委員長
  • 2009, International Symposium on Materials in Space Environment -11, プログラムコミッティーメンバー
  • 2009, International Conference on Protection of Materials and Structures from the Space Environment-9, プログラムコミッティーメンバー
  • 2007, International Conference on Protection of Materials and Structures from the Space Environment-8, プログラムコミッティーメンバー
  • 2006, International Symposium on Materials in Space Environment -10, プログラムコミッティーメンバー
  • 2005, International Conference on Protection of Materials and Structures from the Space Environment-7, プログラムコミッティーメンバー
  • 2003, International Symposium on Materials in Space Environment -9, プログラムコミッティーメンバー
  • 2003, International Conference on Protection of Materials and Structures from the Space Environment-6, プログラムコミッティーメンバー
  • 2001, International Conference on Protection of Materials and Structures from the Space Environment-5, プログラムコミッティーメンバー
  • 2000, International Symposium on Materials in Space Environment -8, プログラムコミッティーメンバー
  • - Present, 応用物理学会, プログラム委員
  • - Present, 日本航空宇宙学会, 関西支部幹事
  • 日本学術振興会, 科学研究費審査委員会委員
  • 宇宙航空研究開発機構, SEDA-APミッション評価会委員
  • 12th Spacecraft Charging Technology Conference, 実行委員会委員
  • International Symposium on Space Technology and Science, プログラム委員
  • 宇宙航空研究開発機構, 宇宙機設計標準ワーキンググループ(WG1)委員
  • 近畿経済産業局, 戦略的基盤技術高度化支援事業審査委員会委員
  • 近畿経済産業局, 特定研究開発等計画認定審査委員会委員
  • 応用物理学会, 大分類世話人
  • 応用物理学会, 講演企画賞委員会委員
  • 応用物理学会, 論文賞委員会委員
  • 日本熱物性学会, 関西地区評議員
  • 日本熱物性学会, 研究会活動委員会委員
  • 日本熱物性学会, 研究分科会「先進材料の熱物性と宇宙システムデザイン研究会」主査
  • 応用物理学会, 関西支部幹事
  • 電気学会, 量子ビームによるナノバイオ科学と基盤技術調査専門委員会委員

Published Papers

  • Enhancement of atomic oxygen resistance of charge dissipative ion beam treated polymers

    Z. Iskanderova, J. Kleiman, F. Bussieres, M. Tagawa, R. Ng, R. Sodhi

    Oct. 2018, 14th International Symposium on Materials in the Space Environment/12th International Conference on protection of Materials and Structures in a Space Environment, English

    [Refereed]

    International conference proceedings

  • Evaluation of vacuum transfer vessel performance to construct cluster type in-situ test facilities network

    Alexandre SIMON, Minoru IWATA, Masahito TAGAWA, Sumitaka TACHIKAWA

    Oct. 2018, 14th International Symposium on Materials in the Space Environment/12th International Conference on protection of Materials and Structures in a Space Environmen, English

    [Refereed]

    International conference proceedings

  • Over-estimation of atomic oxygen fluences due to undecomposed oxygen molecules included in hyperthermal beams

    Masahito Tagawa, Kazuki Kita, Ryota Okura, Yusuke Fujimoto, Ryo Shirakawa, Teppei Shimizu, Minoru Iwata

    Oct. 2018, 14th International Symposium on Materials in the Space Environment/12th International Conference on protection of Materials and Structures in a Space Environment, English

    [Refereed]

    International conference proceedings

  • One-nozzle two-beam laser-detonation system

    Kumiko Yokota, Kazuki Kita, Ryota Okura, Teppei Shimizu, Sze Keat Chee, Minoru Iwata, Masahito Tagawa

    Oct. 2018, 14th International Symposium on Materials in the Space Environment/12th International Conference on protection of Materials and Structures in a Space Environment, English

    [Refereed]

    International conference proceedings

  • Plasma particle simulation of ECR plasma generation in Air Breathing Ion Engine (ABIE

    Ryo Shirakawa, Hideyuki Usui, Yohei Miyake, Masahito Tagawa, Kazutaka Nishiyama

    May 2018, Proceedings of the 15th Spacecraft Charging Technology Conference, English

    International conference proceedings

  • Development of a Pulsed Supersonic Valve Aimed for Martian Atmospheric Simulation

    Ryota Okura, Yusuke Fujimoto, Kazuki Kita, Minoru Iwata, Chee Sze Keat, Yugo Kimoto, Kumiko Yokota, Masahito Tagawa

    May 2018, Proceedings of the 15th Spacecraft Charging Technology Conference, English

    International conference proceedings

  • A Consideration of Degradation of Polymeric Materials in Sub-Low Earth Orbit Space Environmen

    Yusuke Fujimoto, Ryota Okura, Kazuki Kita, Minoru Iwata, Kumiko Yokota, Masahito Tagawa

    May 2018, Proceedings of the 15th Spacecraft Charging Technology Conference, English

    International conference proceedings

  • Hiroki Takamatsu, Masahito Niibe, XiaoLong Zhou, Keiji Komatsu, Hidetoshi Saitoh, Hiroki Akasaka, Akihiro Saiga, Koji Tamada, Masahito Tagawa, Kumiko Yokota, Yuichi Furuyama, Kazuhiro Kanda

    The irradiation effect on fluorinated diamond-like carbon (F-DLC) film was investigated by measuring the dose dependence of various film properties using synchrotron radiation (SR) in the soft X-rays in the SR dose region from 0 to 2000 mA h. Film flatness was maintained but various film properties and surface properties were found to be changed by the SR irradiation. Wettability of the F-DLC film surface increased dramatically within 20 mA h SR exposure, which was ascribed to the decrease in fluorine on the film surface. Film thickness, film density, composition ratio of fluorine atom in film decreased and sp(2) / (sp(2) + sp(3)) ratio of carbon atoms increased within 300 mA h SR exposure, which were ascribed to the desorption of species containing fluorine atoms. In addition, dominant desorbed species emitted from F-DLC film were found in the fluorocarbon group, CFx. Changes in film properties and film thickness did not proceed, when fluorine content in the F-DLC film decreased to about 10% after the 300 mA h SR exposure.

    ELSEVIER SCIENCE SA, Oct. 2017, DIAMOND AND RELATED MATERIALS, 79 (1), 14 - 20, English

    Scientific journal

  • A consideration on degradation of FEP-based radiator equipped to low altitude spacecraft,

    Masahito Tagawa, Yusuke Fujimoto, Kazuki Kita, Kumiko Yokota

    Sep. 2017, European 21st Thermophysical Properties Conference,, English

    Symposium

  • Molecular beam source for degradation studies of polyimide-based thermal blanket in very low altitude space environment

    Kumiko Yokota, Ryota Okura, Chee Sze Keat, Masahito Tagawa

    Sep. 2017, 21st European Thermophysical Properties Conference,, English

    Symposium

  • Collision-induced enhancement of polyimide corrosion in sub-low Earth orbit (LEO) space environment

    Masahito Tagawa, Ryota Okura, Yusuke Fujimoto, Kazuki Kita, Kumiko Yokota

    Aug. 2017, 33rd European Conference on Surface Science,, English

    Symposium

  • A consideration on surface corrosion mechanism of fluoroethylenepropylene (FEP) films in sub-low earth orbit (LEO) environment

    Kumiko Yokota, Yusuke Fujimoto, Ryota Okura, Kazuki Kita, Masahito Tagawa

    Aug. 2017, 33rd European Conference on Surface Science,, English

    Symposium

  • Accelerating effect of atomic oxygen-induced polyimide degradation due to simultaneous collision of chemically inert molecules

    Kazuki Kita, Yusuke Fujimoto, Yuki Yamasaki, Minoru Iwata, Kumiko Yokota, Masahito Tagawa

    Jun. 2017, 31st International Symposium on Space Technology and Science,, English

    International conference proceedings

  • Mass-loss of FEP/Ag films in sub-low Earth orbit space environment

    Yusuke Fujimoto, Kazuki Kita, Yasuko Koshiba, Kenji Ishida, Minoru Iwata, Kumiko Yokota, Masahito Tagawa

    Jun. 2017, 31st International Symposium on Space Technology and Science,, English

    International conference proceedings

  • A pulsed supersonic valve aimed for Martian atmospheric simulation

    Ryota Okura, Minoru Iwata, Chee Sze Keat, Kumiko Yokota, Masahito Tagawa

    Jun. 2017, 31st International Symposium on Space Technology and Science,, English

    International conference proceedings

  • Hyperthermal multiple component molecular/atomic beams: Formation and application to surface science on future space explorations,

    Tsubasa Yasukochi, Kaoru Morimoto, Kumiko Yokota, Masahito Tagawa

    Jan. 2017, Symposium on Surface Science & Nanotechnology -25th Anniversary of SSSJ Kansai, English

    International conference proceedings

  • オーガナイズドセッション:先進材料の熱物性と宇宙システムデザイン

    岩田稔, 長野方星, 太刀川純孝, 田川雅人

    Jan. 2017, 熱物性, 31 (1), English

    [Refereed]

    Scientific journal

  • 宇宙環境工学の観点から見たSLATSへの期待

    田川雅人, 井出健太, 山崎勇希, 北一貴, 横田久美子

    Dec. 2016, 超低高度衛星の利用に向けたワークショップ報告書, JAXA-SP-16-001, Japanese

    [Refereed]

    Symposium

  • Extreme ultraviolet emission from laser-induced O2+Ar plasmas relevance to ground-based simulation of thin film etching reactions in low Earth orbit

    Masahito Tagawa, Takashi Ohyabu, Junki Ohira, Kaoru Morimoto, Kumiko Yokota

    Dec. 2016, Pacific Rim Symposium on Surfaces, Coatings and Interfaces,, English

    Symposium

  • A pulsed supersonic valve system for researches on collision-induced reactive thin film etching phenomena

    Masahito Tagawa, Kumiko Yokota, Tsubasa Yasukochi, Chee Sze Keat

    Dec. 2016, Pacific Rim Symposium on Surfaces, Coatings and Interfaces,, English

    Symposium

  • Atomic oxygen-induced erosion property of polyimide-based multilayer insulation in very low altitude

    Kumiko Yokota, Yuki Yamasaki, Kazuki Kita, Masahito Tagawa

    Oct. 2016, 11th Asia Thermophysical Properties Conference,, English

    Symposium

  • Extreme ultraviolet emission from laser-induced plasma relevance to neutral gas environment simulation in low Earth orbit

    Kumiko Yokota, Masahito Tagawa

    Jun. 2016, 16th Joint Vacuum Conference, 14th European Vacuum Conference,, English

    Symposium

  • A fast piezoelectric-driven pulsed supersonic valve using displacement enlargement mechanism for molecular beam applications

    Masahito Tagawa, Kumiko Yokota, Chee Sze Keat

    Jun. 2016, 16th Joint Vacuum Conference, 14th European Vacuum Conference,, English

    Symposium

  • Kengo Kidena, Minami Endo, Hiroki Takamatsu, Masahito Niibe, Masahito Tagawa, Kumiko Yokota, Yuichi Furuyama, Keiji Komatsu, Hidetoshi Saitoh, Kazuhiro Kanda

    2015, Metals, 5, 1957 - 1970, English

    Scientific journal

  • Kengo Kidena, Minami Endo, Hiroki Takamatsu, Ryo Imai, Masahito Niibe, Kumiko Yokota, Tagawa Masahito, Yuichi Furuyama, Keiji Komatsu, Hidetoshi Saitoh, Kazuhiko Kanda

    2015, Trans. Mat. Res. Soc. Japan, 40 (4), 353 - 358, English

    [Refereed]

    Scientific journal

  • Kumiko Yokota, Daiki Watanabe, Junki Ohira, Masahito Tagawa

    A multiple-composition beam with a velocity of 8 km s(-1) was formed using a laser detonation source in order to simulate the physical and chemical effects of neutral gas collisions on a material in the sub-low earth orbit (LEO). A premixed target gas was applied in the laser detonation beam technique. It was found that atoms of different masses, O and Ar for Ar + O-2 target gas, are accelerated to similar velocities, i.e. different translational energies. Promotion of O-2 decomposition is confirmed by using a mixed gas target. It is concluded that the multiple-composition beam obtained using a mixed target gas is suitable for simulating a neutral gas environment in the sub-LEO region.

    IOP PUBLISHING LTD, May 2014, PHYSICA SCRIPTA, T161 (161), English

    [Refereed]

    Scientific journal

  • Kazuhiro Kanda, Kazuhiro Fukuda, Kengo Kidena, Ryo Imai, Masahito Niibe, Synya Fujimoto, Kumiko Yokota, Masahito Tagawa

    Surface structural changes of Ti-doped diamond-like carbon (Ti-DLC) film exposed to a hyperthermal atomic oxygen beam were investigated using near-edge X-ray absorption fine structure (NEXAFS) spectroscopy using synchrotron radiation. The spectral shape of the C K NEXAFS spectrum of as-deposited Ti-DLC film resembled that of DLC film. After exposure to atomic oxygen, the spectrum resembled that of TiC powder. The sp(2)/(sp(2) + sp(3)) ratio of as-deposited Ti-DLC film decreased drastically by exposure to a hyperthermal atomic oxygen beam. On the other hand, the spectral shape in the Ti L NEXAFS spectrum of as-deposited Ti-DLC film resembled that of TiC powder and became similar to that of TiO2 powder after exposure to atomic oxygen. These changes are ascribable to the desorption of C atoms as CO and/or CO2 from Ti-DLC film due to the irradiation of atomic oxygen beam. On the other hand, oxidized Ti was not desorbed from the Ti-DLC film. As a result, the sp(2)/(sp(2) + sp(3)) ratio of C in the Ti-DLC film decreased, because residual C atoms were bonded to Ti atoms. (C) 2014 Published by Elsevier B.V.

    ELSEVIER SCIENCE SA, Jan. 2014, DIAMOND AND RELATED MATERIALS, 41, 49 - 52, English

    Scientific journal

  • Kazuhiro Kanda, Kazuhiro Fukuda, Kengo Kidena, Ryo Imai, Masahito Niibe, Synya Fujimoto, Kumiko Yokota, Masahito Tagawa

    Surface structural changes of Ti-doped diamond-like carbon (Ti-DLC) film exposed to a hyperthermal atomic oxygen beam were investigated using near-edge X-ray absorption fine structure (NEXAFS) spectroscopy using synchrotron radiation. The spectral shape of the C K NEXAFS spectrum of as-deposited Ti-DLC film resembled that of DLC film. After exposure to atomic oxygen, the spectrum resembled that of TiC powder. The sp(2)/(sp(2) + sp(3)) ratio of as-deposited Ti-DLC film decreased drastically by exposure to a hyperthermal atomic oxygen beam. On the other hand, the spectral shape in the Ti L NEXAFS spectrum of as-deposited Ti-DLC film resembled that of TiC powder and became similar to that of TiO2 powder after exposure to atomic oxygen. These changes are ascribable to the desorption of C atoms as CO and/or CO2 from Ti-DLC film due to the irradiation of atomic oxygen beam. On the other hand, oxidized Ti was not desorbed from the Ti-DLC film. As a result, the sp(2)/(sp(2) + sp(3)) ratio of C in the Ti-DLC film decreased, because residual C atoms were bonded to Ti atoms. (C) 2014 Published by Elsevier B.V.

    ELSEVIER SCIENCE SA, Jan. 2014, DIAMOND AND RELATED MATERIALS, 41, 49 - 52, English

    [Refereed]

    Scientific journal

  • レーザーデトネーション法による低軌道宇宙環境地上シミュレーションとEUV

    Tagawa Masahito, Yokota Kumiko

    2014, レーザー研究, 42 (1), 50 - 54, Japanese

    [Refereed]

    Scientific journal

  • オーガナイズドセッション:先進材料の熱物性と宇宙システムデザイン

    TAGAWA MASAHITO, TACHIKAWA SUMITAKA

    日本熱物性学会, 2014, 熱物性, 28 (1), 41, Japanese

    [Refereed]

    Research society

  • Evaluation and application of the EUV emitted from a laser-detonation atomic oxygen space environmental simulator: FY2013 report

    TAGAWA MASAHITO, YOKOTA KUMIKO, Ohira Junki, Kimoto Yugo, Nishimura Hiroaki

    大阪大学レーザーエネルギー学研究センター, 2014, 大阪大学レーザーエネルギー学研究センター平成25年度共同利用・共同研究成果報告書, 171 - 172, Japanese

    Research institution

  • Shimada Atsuko, Tanaka Yoshinobu, Ohkawa Yasushi, Matsumoto Koji, Tagawa Masahito, Matsui Makoto, Yamagiwa Yoshiki

    An Electrodynamic tether (EDT) is an attractive propulsion device for active debris removal systems. One of the key components of the EDT system is an electron emission device, and we have studied a field emission cathode (FEC) using carbon nanotubes (CNTs) because of its simplicity and potential capabilities. Since EDT systems are operated in low earth orbit (LEO), the CNTs in the FEC may be affected by atomic oxygen (AO), so the effect of AO irradiation on the FEC was studied. We conducted AO irradiation tests on FECs using laser detonation beam facilities and compared the pre- and post-irradiation electron emission characteristics. As a result, the FEC could not emit electrons when the total AO fluence of 3×1020 /cm2 was irradiated perpendicular to the emission surface. In this case, CNTs on the emitter surface disappeared by AO irradiation. When the irradiation direction was parallel to the emission surface, on the other hand, the FEC could emit electrons after the irradiation although the required voltage increased up to 1.5 times as high as that of pre-irradiation condition. This comparison indicated that the direction of AO irradiation has strong effect on the performance degradation of the FEC on orbit.

    THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, 2014, Aerospace Technology Japan, 12 (29), 59 - 64, English

    [Refereed]

    Scientific journal

  • Yokota Kumiko, Tagawa Masahito, Yoshigoe Akitaka, Teraoka Yuden

      Oxidation reaction efficiency of the embedded Si atoms in the diamond-like carbon (DLC) film was studied with a combination of the broad O-atom beam, high-speed chopper wheel and synchrotron radiation photoelectron spectroscopy (SR-PES). The high-speed chopper wheel converted the translational energy distribution of O-atom into spatial distribution on the DLC surface. High spatial and energy resolutions of SR-PES allow studying the difference in oxidation states of Si atoms in different translational energies. It was confirmed that the SiO2 was formed by the high-energy collision conditions of O-atoms, whereas sub-oxides are formed with the low-energy collisions. The efficiency of SiO2 formation at 9 eV-collision is evaluated to be 4 times greater than that at 2 eV-collision.

    The Surface Analysis Society of Japan, 2014, Journal of Surface Analysis, 20 (3), 221 - 225, English

    [Refereed]

    Scientific journal

  • 非回収軌道上試験を目指した国産宇宙用QCMの特性と地上キャリブレーション法

    井出 健太, 山崎 勇希, 潮田 陽介, 西山 和孝, 横田 久美子, 田川 雅人

    第10回宇宙環境シンポジウム (2013年12月2日-3日. 科学技術館), 東京形態: カラー図版あり資料番号: AA0062301011レポート番号: JAXA-SP-13-016

    JAXA, Dec. 2013, 第10回宇宙環境シンポジウム, JAXA-SP (SP-13-016), 71 - 73, Japanese

    Research institution

  • 大気吸入型イオンエンジン放電室内におけるプラズマ生成シミュレーション

    本山 貴仁, 臼井 英之, 三宅 洋平, 川口 伸一郎, 横田 久美子, 田川 雅人

    JAXA, Dec. 2013, 第10回宇宙環境シンポジウム, JAXA-SP (JAXA-SP-13-016), 61 - 64, Japanese

    Research institution

  • A Synchrotron Radiation Photoelectron Spectroscopic Study on the Oxidation Reaction of Si by O-atom with Collision Energies between 2 to 9 eV

    Kumiko Yokota, Masahito Tagawa, Akitaka Yoshigoe, Yuden Teraoka

    Nov. 2013, PSA-13, USB, English

    International conference proceedings

  • Use of laser-induced plasmas for gas-surface interaction studies on Earth observation satellites

    Masahito Tagawa, Kumiko Yokota

    Sep. 2013, International Conference on Research and Applications of Plasmas, USB, English

    International conference proceedings

  • Influence of 9 eV collision of chemically inert molecules on fluorinated polymer erosion in sub-low earth orbit

    Kumiko Yokota, Masahito Tagawa, Koji Matsumoto, Yuichi Furuyama, Akira Kitamura, Kazuhiro Kanda, Mayumi Tode, Akitaka Yoshigoe, Yuden Teraoka

    Sep. 2013, 19th International Vacuum Congress,, USB, English

    International conference proceedings

  • Influence of 5 eV collision of O-atoms on material erosions in low earth orbit space environment

    Masahito Tagawa, Kumiko Yokota

    Sep. 2013, 19th International Vacuum Congress,, USB, English

    International conference proceedings

  • Kumiko Yokota, Daiki Watanabe, Junki Ohira, Takashi Oyabu, Masahito Tagawa

    Sep. 2013, International Conference on Research and Applications of Plasmas, USB, English

    International conference proceedings

  • Microwave Plasma Simulation for the Development of Air Breathing Ion Engine

    Takahito Motoyama, Hideyuki Usui, Yohei Miyake, Akihiko Hashimoto, Masahito Tagawa, Kumiko Yokota

    Aug. 2013, The 11th International School Symposium for Space Simulations, USB, English

    International conference proceedings

  • Synergistic effect of atomic oxygen and vacuum ultraviolet on polymeric materials at various temperatures

    Yosuke Ushioda, Takaho Tsuboi, Kenta Ide, Masahito Tagawa, Kumiko Yokota, Akio Okamoto

    JSASS, Jun. 2013, The 29th International Space Technology and Sciences, USB, English

    International conference proceedings

  • Sub-low Earth orbit neutral gas environment simulation using laser detonation beam source

    Takashi Ohyabu, Shigeru Yasuda, Masahito Tagawa, Kumiko Yokota

    JSASS, Jun. 2013, The 29th International Space Technology and Sciences, USB, English

    International conference proceedings

  • Microwave plasma simulation for the development of air breathing ion engine

    Takahito Motoyama, Hideyuki Usui, Yohei Miyake, Kumiko Yokota, Masahito Tagawa

    JSASS, Jun. 2013, The 29th International Space Technology and Sciences, USB, English

    International conference proceedings

  • Impact of high-energy collision of inert gas on the material degradation in space environment -Erosion properties in the hyperthermal multiple composition beams-

    Masahito Tagawa, Takashi Ohyabu, Shigeru Yasuda, Kumiko Yokota, Akio Okamoto

    JSASS, Jun. 2013, The 29th International Space Technology and Sciences, USB, English

    International conference proceedings

  • Impact of high-energy collision of inert gas on the material degradation in space environment -Comparison of the ground-based data and MISSE-2 analysis-,

    Kumiko Yokota, Takashi Ohyabu, Shigeru Yasuda, Masahito Tagawa

    JSASS, Jun. 2013, The 29th International Space Technology and Sciences, USB, English

    International conference proceedings

  • A ground-based simulation study for FEP erosion on the SLATS/MDM mission

    Shinji Fujimoto, Shigeru Yasuda, Daiki Watanabe, Kumiko Yokota, Masahito Tagawa, Yugo Kimoto, Junichiro Ishizawa

    JSASS, Jun. 2013, The 29th International Space Technology and Sciences, USB, English

    International conference proceedings

  • Masahito Tagawa, Kumiko Yokota, Kazutaka Nishiyama, Hitoshi Kuninaka, Yasuo Yoshizawa, Daisaku Yamamoto, Takaho Tsuboi

    The basic properties of an air breathing ion engine, which uses upper atmospheric gases as a propellant, were experimentally investigated. The N-2 environment in a sub-low Earth orbit (altitude of 140-200 kin) was simulated by a laser detonation beam source, which has been previously used in studies on atomic oxygen-induced material degradation. The basic properties of the air breathing ion engine were studied using a hyperthermal N-2 beam. It is suggested that the hyperthermal N-2 molecules thermalized by scattering at the reflector surface in the air breathing ion engine. The efficiency of the collimator was experimentally investigated and the collimator was found to maintain the N-2 pressure inside the air breathing ion engine. An ion beam current of 16 mA at an acceleration voltage of 200 V provided a thrust of 0.13 mN for both hyperthermal N-2 and atomic oxygen beams. The maximum ion beam current was found to be limited by the space-charge effect. The experimental results strongly indicated the recombination of atomic oxygen into O-2 molecules inside the air breathing ion engine.

    AMER INST AERONAUTICS ASTRONAUTICS, May 2013, JOURNAL OF PROPULSION AND POWER, 29 (3), 501 - 506, English

    [Refereed]

    Scientific journal

  • “Evaluation and application of the EUV emitted from a laser-detonation atomic oxygen space environmental simulator: FY2012 report”, (2013), pp.195-196.

    Masahito Tagawa, Kumiko Yokota, Yugo Kimoto, Mayuko Koga, Hiroaki Nishimura

    ILE, Osaka University, May 2013, 大阪大学レーザーエネルギー学研究センター平成24年度共同利用・共同研究成果報告書, 195 - 196, English

    Research institution

  • Survivability of silicon-doped diamond-like carbon films in energetic atomic/molecular oxygen beam environments

    Masahito Tagawa, Kazuhiro Kishida, Kumiko Yokota, Koji Matsumoto, Akitaka Yoshigoe, Yuden Teraoka, Jianming Zhang, Timothy K. Minto

    Springer, Apr. 2013, Protection of Materials and Structure in a Space Environment, 547 - 556, English

    [Refereed]

    International conference proceedings

  • Resistance of Si-containing carbonized lignin to atomic oxygen

    Takeshi Kajimoto, Toshimitsu Hata, Masahito Tagawa, Hirotsugu Kojima, Hajime Hayakawa

    Springer, Apr. 2013, Protection of Materials and Structure in a Space Environment, 541 - 546, English

    [Refereed]

    International conference proceedings

  • Reaction mechanism of the irradiation of soft X-ray to the diamond-like carbon films

    Kazuhiro Kanda, Masahito Niibe, Masahito Tagawa, Kumiko Yokota

    Springer, Apr. 2013, Protection of Materials and Structure in a Space Environment, 159 - 164, English

    [Refereed]

    International conference proceedings

  • Microtribological properties of molybdenum disulfide bonded film exposed to space environment by SM/SEED mission

    Masahito Tagawa, Kumiko Yokota, Masao Akiyama, Koji Matsumoto, Mineo Suzuki

    Springer, Apr. 2013, Protection of Materials and Structure in a Space Environment, English

    [Refereed]

    International conference proceedings

  • Hydrogen removal from hydrogenated diamond-like carbon films by photon and energetic atomic oxygen exposures

    Kumiko Yokota, Masahito Tagawa, Koji Matsumoto, Yuichi Furuyama, Akira Kitamura, Kazuhiro Kanda, Mayumi Tode, Akitaka Yoshigoe, Yuden Teraoka

    Springer, Apr. 2013, Protection of Materials and Structure in a Space Environment, 531 - 541, English

    [Refereed]

    International conference proceedings

  • Extreme ultraviolet emission form a carbon dioxide laser-sustained oxygen plasma

    Akira Mizutani, Kazuhiro Kishida, Kumiko Yokota, Masahito Tagawa, Hiroyuki Shimamura, Yugo Kimoto, Mayuko Koga, Hiroaki Nishimura

    Springer, Apr. 2013, Protection of Materials and Structure in a Space Environment, 547 - 556, English

    [Refereed]

    International conference proceedings

  • Masahito Tagawa, Kazuhiro Kishida, Kumiko Yokota, Yugo Kimoto, Mayuko Koga, Hiroaki Nishimura

    AIAA, Apr. 2013, J. Spacecraft and Rockets,, 50, 460 - 462, English

    [Refereed]

    Scientific journal

  • Kumiko Yokota, Shigeru Yasuda, Akira Mizutani, Masahito Tagawa

    The relative ionization probabilities of laser-detonation hyperthermal O, O-2, and Ar components in Ar+O-2 mixed molecular beams were evaluated for investigation of the effect of the space environment. In a high-energy beam, the complete decomposition of O-2 was observed from the time-of-flight (TOF) spectra, which was due to high-energy collisions between O-2 and Ar. Relative ionization probabilities of O and O-2 of 0.27 and 0.79, respectively, with respect to Ar were evaluated by assuming the complete decomposition of O-2 in the beam. These values can be applied in studies on the effect of the space environment in the sub-low Earth orbit region where simultaneous hyperthermal N-2 and O bombardment should be simulated. (c) 2013 The Japan Society of Applied Physics

    IOP PUBLISHING LTD, Mar. 2013, JAPANESE JOURNAL OF APPLIED PHYSICS, 52 (3), 038002, English

    [Refereed]

    Scientific journal

  • Masahito Tagawa, Kumiko Yokota, Kunitaka Ochi, Masao Akiyama, Koji Matsumoto, Mineo Suzuki

    Macro- and microtribological properties of the MoS(2) film exposed to atomic oxygen, ultraviolet rays and radiation both in low earth orbit (LEO) and in ground-based facility were evaluated relevance to micro/nano satellites. MoS(2) samples are exposed to LEO space environment by the space environment exposure device experiment on international space station. Laser-detonation atomic oxygen beam source was used for atomic oxygen simulation on the ground. X-ray photoelectron spectroscopy and energy dispersive spectroscopy measurements suggested that electron beam and ultraviolet exposure did not affect chemical structure of MoS(2) surfaces. However, atomic oxygen-exposed and flight samples showed surface oxidation. It was found that the macroscopic friction coefficient of the flight sample was similar to that of the control sample. In contrast, remarkable increase in friction coefficient in microscopic properties was observed.

    SPRINGER/PLENUM PUBLISHERS, Feb. 2012, TRIBOLOGY LETTERS, 45 (2), 349 - 356, English

    [Refereed]

    Scientific journal

  • Use of one-side silver-coated FEP on SALTS/MDM mission for mechanistic study of fluoropolymer erosion in LEO

    Kumiko Yokota, Shigeru Yasuda, Masahito Tagawa, Kazuhiro Aoyama, Eiji Miyazaki, Yugo Kimoto

    2012, Proceedings of 12th International Symposium on Materials in Space Environment,, CD - ROM, English

    [Refereed]

    International conference proceedings

  • Temperature effect on synergistic erosion of polyimide under simultaneous exposure conditions of atomic oxygen and vacuum ultraviolet

    Takaho Tsuboi, Yosuke Ushioda, Kumiko Yokota, Masahito Tagawa, Akio Okamoto

    2012, Proceedings of 12th Spacecraft Charging Technology Conference, CD - ROM, English

    [Refereed]

    International conference proceedings

  • Origin of fluoropolymer erosion in low earth orbit space environment

    Masahito Tagawa, Kazuhiro Kishida, Akira Mizutani, Takashi Ohyabu, Kumiko Yokota, Akio Okamoto

    2012, Proceedings of 12th Spacecraft Charging Technology Conference, CD - ROM, English

    [Refereed]

    International conference proceedings

  • Numerical Simulation of Microwave Plasma in Air Breathing Ion Engine

    Takahito Motoyama, Hideyuki Usui, Yohei Miyake, Akihiko Hashimoto, Masahito Tagawa, Kumiko Yokota

    2012, Extended Abstract on the International Conference on Simulation Technology 2012, English

    [Refereed]

    International conference proceedings

  • Importance of beam-surface interactions on long-term missions of spacecraft in low planetary altitudes

    Masahito Tagawa, Kumiko Yokota, Kunitaka Ochi, Masao Akiyama, Koji Matsumoto, Mineo Suzuki

    2012, roceedings of JVC-14 / EVC-12 / AMDVG-11 / CroSloVM-19, CD - ROM, English

    [Refereed]

    International conference proceedings

  • Formation of multiple-composition beam for super-LEO space environmental simulation”, Masahito Tagawa,

    Masahito Tagawa, Akira Mizutani, Shigeru Yasuda, Kumiko Yokota

    2012, Proceedings of 12th International Symposium on Materials in Space Environment,, CD - ROM, English

    [Refereed]

    International conference proceedings

  • Formation of hyperthermal multiple composition beams for space environmental simulation in super low earth orbi

    Kumiko Yokota, Akira Mizutani, Shigeru Yasuda, Masahito Tagawa

    2012, roceedings of JVC-14 / EVC-12 / AMDVG-11 / CroSloVM-19, CD - ROM, English

    [Refereed]

    International conference proceedings

  • Flight evaluation program on survivability of FEP in super-low earth orbit environment

    Kumiko Yokota, Masahito Tagawa, Kazuhiro Aoyama, Eiji Miyazaki, Yugo Kimoto

    2012, 64th International Astronautical Congress, CD - ROM, English

    [Refereed]

    International conference proceedings

  • Role of hyperthermal atomic/molecular collisions on a space environmental effect of polymeric materials

    Masahito Tagawa, Kumiko Yokota

    Dec. 2010, Proc. Pacifichem 2010, CD-ROM, English

    [Refereed]

    International conference proceedings

  • Near edge X-ray absorption fine structure measurements of DLC and a-SiCx:H films

    Akira Wada, Takeshi Ogaki, Tomoyuki Yasukawa, Fumio Mizutani, Masahito Tagawa, Tsuneo Suzuki, Masahito Niibe, Hidetoshi Saitoh, Kazuhiro Kanda, Haruhiko Ito

    Dec. 2010, 4th Workshop for International Standardization of Diamond-like Coatings, CD-ROM, English

    [Refereed]

    International conference proceedings

  • Combined effect of atomic oxygen and vacuum ultraviolet on polymer degradation: Relevance to space environmental effect on polymer degradation

    Masahito Tagawa, Kumiko Yokota

    Dec. 2010, Proc. Pacifichem 2010, CD-ROM, English

    [Refereed]

    International conference proceedings

  • Masahito Tagawaa, Kumiko Yokota, Akira Kitamura, Koji Matsumoto, Akitaka Yoshigoe, Yuden Teraoka, Kazuhiro Kanda, Masahito Niibe

    Surface structural changes of a hydrogenated diamond-like carbon (DLC) film exposed to a hyperthermal atomic oxygen beam were investigated by Rutherford backscattering spectroscopy (RBS), synchrotron radiation photoelectron spectroscopy (SR-PES), and near-edge X-ray absorption. ne structure (NEXAFS). It was confirmed that the DLC surface was oxidized and etched by high-energy collisions of atomic oxygen. RBS and real-time mass-loss data showed a linear relationship between etching and atomic oxygen fluence. SR-PES data suggested that the oxide layer was restricted to the topmost surface of the DLC film. NEXAFS data were interpreted to mean that the sp(2) structure at the DLC surface was selectively etched by collisions with hyperthermal atomic oxygen, and an sp(3)-rich region remained at the topmost DLC surface. The formation of an sp(3)-rich layer at the DLC surface led to surface roughening and a reduced erosion yield relative to the pristine DLC surface. (C) 2010 Elsevier B.V. All rights reserved.

    ELSEVIER SCIENCE BV, Oct. 2010, APPLIED SURFACE SCIENCE, 256 (24), 7678 - 7683, English

    [Refereed]

    Scientific journal

  • Takeshi Kajimoto, Toshimitu Hata, Masahito Tagawa, Hirotsugu Kojima, Yusuke Imamura, Hajime Hayakawa, Yoshikatsu Ueda, Hiroshi Yamakawa

    An analysis of the erosional properties of carbonized lignin with a Si content of 0 to 40% under the simulated atomic oxygen (AO) conditions found in low earth orbit was carried out. The AO environment was produced using a laser detonation atomic oxygen beam source. X-ray photoelectron spectroscopy revealed an increase in the atomic concentration of oxygen-related groups on the surface of the carbonized lignin with and without Si. The erosion rate was found to be low for the case of carbonized lignin with>20% Si. The Si-free sample exhibited a resistance to oxidation due to the formation of an oxide area that protected it from further AO effects on chemical bonds such as C=C bonds. The surface chemistry of the Si-free samples was similar to that of diamond-like carbon (DLC). These experimental results suggest that carbonized lignin derived from Sugi wood has the potential to be used in materials for space applications.

    High Temperature Society of Japan, Aug. 2010, 高温学会誌, Vol.36, No.4, pp.185-191 (4), 185 - 191, Japanese

    [Refereed]

    Scientific journal

  • A Consideration of Future Flight Material Exposure Experiments in Japan: Advanced Material Exposure Test Working Group’s Proposal

    Masahito Tagawa, Kumiko Yokota, Mengu Cho, Minoru Iwata, Rikio Yokota, Mineo Suzuki, Koji Matsumoto, Yugo Kimoto, Eiji Miyazaki, Hiroyuki Shimamura

    Aug. 2010, Transactions of the Japan Society for Aeronautical and Space Sciences, Space Technology Japan, Vol. 8,�No. ists27, pp.Th_1-Th, English

    [Refereed]

    Scientific journal

  • Masahito Tagawa, Kumiko Yokota, Kazuhiro Kishida, Akio Okamoto, Timothy K. Minton

    The origin of the inconsistency in the erosion phenomena of fluorocarbon polymers between a ground-based atomic-oxygen test environment and the low Earth orbital space environment has been investigated. A detailed experiment was performed in order to study the effect of the high-energy component in the atomic-oxygen beam pulses on the erosion. The experiment was carried out with the combination of a polymer-coated quartz crystal microbalance and a high-speed chopper wheel installed in a laser-detonation atomic-oxygen facility. It was clearly observed that the mass-loss rates of both polyimide and fluorocarbon polymers depend on the impact energy of atomic oxygen. However, the energy dependence is more significant on the fluorocarbon polymer compared with that on polyimide. Collisions of atomic oxygen with translational energies higher than similar to 5 eV induce a significant mass loss on the fluorocarbon polymer. These experimental findings agree with earlier measurements of the volatile products released during hyperthermal O-atom bombardment, and they are consistent with theoretical calculations on related systems. It is concluded that the difference in the collision energy distribution of atomic oxygen between laboratory and space environments is the major reason for the difference in erosion yields measured in the two environments.

    AMER CHEMICAL SOC, Jul. 2010, ACS APPLIED MATERIALS & INTERFACES, 2 (7), 1866 - 1871, English

    [Refereed]

    Scientific journal

  • Role of Inert Gas Collision on a Material Degradation in Low Earth Orbit

    Masahito Tagawa, Kumiko Yokota

    Jun. 2010, Proc. 61st International Astronautical Congress, CD-ROM, English

    [Refereed]

    International conference proceedings

  • Kumiko Yokota, Shingo Abe, Masahito Tagawa, Minoru Iwata, Eiji Miyazaki, Jun-Ichiro Ishizawa, Yugo Kimoto, Rikio Yokota

    Real-time measurement of the erosion rate of a commercially available Si-containing polyimide (BSF30) under hyperthermal atomic oxygen (AO) beam exposure condition, which simulates the AO environment in low Earth orbit (LEO), was performed. It was found that the erosion rate of BSF30 decreased with increasing AO fluence and it reached as low as 4% of the standard PMDA-ODA polyimide. X-ray photoelectron spectroscopy confirmed that the surface of AO-exposed BSF30 was covered by a SiO(2) layer which functioned as a protective coating. In contrast, an SiO(2) surface layer thick enough to protect bulk BSF30 was not formed by thermal AO, which was generated by vacuum ultraviolet exposure in an O(2) atmosphere. Exposure to hyperthermal AO collision in LEO can also form an SiO(2) layer which enables the surface to be self-healing and is desirable for a polyimide that would be used in LEO.

    SAGE PUBLICATIONS LTD, Apr. 2010, HIGH PERFORMANCE POLYMERS, 22 (2), 237 - 251, English

    [Refereed]

    Scientific journal

  • Evaluation and application of the EUV emitted from a laser-detonation atomic oxygen space environmental simulator: FY2009 report

    Masahito Tagawa, Kumiko Yokota, Hiroyuki Shimamura, Yugo Kimoto, Mayuko Koga, Hiroaki Nishimura

    Mar. 2010, 大阪大学レーザーエネルギー学研究センター平成21年度共同利用・共同研究成果報告会, pp184-185, English

    International conference proceedings

  • Eiji Miyazaki, Masahito Tagawa, Kumiko Yokota, Rikio Yokota, Yugo Kimoto, Junichiro Ishizawa

    Silicon containing polyimide is proposed as an atomic-oxygen (AO)-tolerant material for Low Earth Orbit flight. For this study, commercially available polysiloxane-block-polyimide film is selected for investigation. An AO beam is irradiated on the polysiloxane-block-polyimide film at the Combined Space Effects Test Facility of JAXA in Tsukuba, Japan. To investigate the AO tolerance, mass change measurement, cross-sectional transmission electron microscopic (TEM) observation, and X-ray photoelectron spectroscopic (XPS) analysis are performed. Results show that the mass loss of polysiloxane-block-polyimide is one one-hundredth or less than that of Kapton (R) H: Cross-sectional TEM observation and XPS analysis reveals that the AO protective SiO(2) layer is self-organized by AO irradiation. Furthermore, the self-organized SiO(2) layer is intentionally damaged to investigate reorganization of a new layer on it. Further AO irradiation of the damaged surface revealed that the new layer is built with a 500-nm-deep eroded region. The result verifies the "self-healing" ability of polysiloxane-block-polyimide. These results suggest that polysiloxane-block-polyimide film has high potential to provide many advantages of a space-use material, especially for LEO spacecraft. (C) 2009 Elsevier Ltd. All rights reserved.

    PERGAMON-ELSEVIER SCIENCE LTD, Mar. 2010, ACTA ASTRONAUTICA, 66 (5-6), 922 - 928, English

    [Refereed]

    Scientific journal

  • Effect of Vacuum Ultraviolet Exposure and Surface Oxide Layer on the Hydrogen Desorption from Hydrogenated Diamond-like Carbon Films

    Masahito Tagawa, Kumiko Yokota, Yuichi Furuyama, Kazuhiro Kanda, Mayumi Tode, Akitaka Yoshigoe, Yuden Teraoka

    Feb. 2010, 第5回JEAE放射光科学シンポジウム, CD-ROM, English

    International conference proceedings

  • Masahito Tagawa, Kumiko Yokota, Kazuhiro Kishida, Akio Okamoto, Junichiro Ishizawa, Timothy K. Minto

    Feb. 2010, High Performance Polymers, Vol.22 No.2, pp.213-224., English

    [Refereed]

    Scientific journal

  • Departure Process of Hydrogen from Highly-Hydrogenated Diamond-Like Carbon Film by Exposure to Synchrotron Radiation

    Kazuhiro Kanda, Kumiko Yokota, Masahito Tagawa, Mayumi Tode, Yuden Teraoka, Shinji Matsui

    Feb. 2010, 第5回JEAE放射光科学シンポジウム, CD-ROM, English

    International conference proceedings

  • 原子状酸素地上試験の高精度化について

    Kumiko Yokota, Kazuhiro Kishida, Masahito Tagawa

    Jan. 2010, 第26回宇宙利用シンポジウム, pp.110-111, Japanese

    International conference proceedings

  • 衛星搭載用原子状酸素センサーのキャリブレーション法について

    Masahito Tagawa, Kazuhiro Kishida, Kumiko Yokota

    Jan. 2010, 第26回宇宙利用シンポジウム, pp.112-113, Japanese

    International conference proceedings

  • 衛星搭載用原子状酸素モニター装置の地上キャリブレーションに関する一考察

    Masahito Tagawa, Kumiko Yokota

    Oct. 2009, 第6回宇宙環境シンポジウム報告書, pp.179-182, Japanese

    International conference proceedings

  • Tolerance of Commercially Available Polysiloxane-Block-Polyimide Film against Space Environment in Low Earth Orbit

    Eiji Miyazaki, Masahito Tagawa, Kumiko Yokota, Rikio Yokota, Yugo Kimoto, Junichiro Ishizawa

    Sep. 2009, Proceedings of the 11th International Symposium on Materials in Space Environment, CD-ROM, English

    International conference proceedings

  • The remarkable lack of synergistic effects in the erosion of FEP teflon

    Timothy K. Minton, Jianming Zhang, Ned F. Lindholm, Amy L. Brunsvold, Hari P. Upadhyaya, Masahito Tagawa

    Sep. 2009, Proceedings of the 11th International Symposium on Materials in Space Environment, CD-ROM, English

    International conference proceedings

  • Origins of the accelerated erosion of fluorinated polymer in a laser-detonation ground-based atomic oxygen facility

    Masahito Tagawa, Kumiko Yokota, Kazuhiro Kishida, Akio Okamoto

    Sep. 2009, Proceedings of the 11th International Symposium on Materials in Space Environment, CD-ROM, English

    International conference proceedings

  • Fluorination of PMDA-ODA Polyimide using Hyperthermal Atomic Fluorine Beams

    Masahito Tagawa, Kumiko Yokota, Kensuke Akamatsu, Hidemi Nawafune

    Sep. 2009, Polyimides and Other High Temperature Polymers, Vol.5, pp249-260, English

    [Refereed]

    Scientific journal

  • Durability of a Silicon-Containing Polyimide in a Simulated Low Earth Orbit Space Environment

    Kumiko Yokota, Masahito Tagawa, Minoru Iwata, Eiji Miyazaki, Jun-ichiro Ishizawa, Mineo Suzuki, Rikio Yokota

    Sep. 2009, Polyimides and Other High Temperature Polymers, Vol.5, pp379-390, English

    [Refereed]

    Scientific journal

  • Combined effect of atomic oxygen and vacuum ultraviolet from deuterium lamp on the erosion of polymeric materials

    Kumiko Yokota, Kazuhiro Kishid, Akio Okamoto, Masahito Tagawa

    Sep. 2009, Proceedings of the 11th International Symposium on Materials in Space Environment, CD-ROM, English

    International conference proceedings

  • Kumiko Yokota, Masahito Tagawa, Akira Kitamura, Koji Matsumoto, Akitaka Yoshigoe, Yuden Teraoka, Julien Fontaine, Michel Belin

    Jun. 2009, Space Technology Japan, Vol.7, pp.Pc_37-Pc_42., English

    [Refereed]

    Scientific journal

  • Masahito Tagawa, Kumiko Yokota

    The importance of space environmental effect on material is addressed. Some examples of the material degradation in a particular space environment are introduced. In order to endorse the material properties requested in a mission, ground-based studies are quite important. However, present deficient ground-based simulation technology cannot perform the accurate assessment of the material degradation in space. On the other hand, infrastructures for the material evaluation using Kibo and International Space Station, is now established after long desire of material scientists and engineers. However, we will face difficulty for retrieve the exposed sample by the retirement of Space Shuttle. Development of new material evaluation methods using small satellite without retrieving the samples and of the accurate ground-based simulation techniques are both highly desired to achieve low-risk missions.

    THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, Jun. 2009, Space Technology Japan, Vol.7, pp.Tr_2_21-Tr_2_26 (26), Tr_2_21 - Tr_2_26, English

    [Refereed]

    Scientific journal

  • Erosion properties of PMDA-ODA polyimide as a reference material for atomic oxygen fluence monitoring

    Kumiko Yokota, Masahito Tagawa

    Jun. 2009, Proceedings of the 27th International Symposium on Space Technology and Science, USB Memory, English

    International conference proceedings

  • Energy dependence on fluorinated polymer erosion by hyperthermal atomic oxygen exposures: a high-speed chopper and quartz crystal microbalance study

    Kazuhiro Kishida, Kumiko Yokota, Akio Okamoto, Masahito Tagawa

    Jun. 2009, Proceedings of the 27th International Symposium on Space Technology and Science, USB Memory, English

    International conference proceedings

  • Koji Matsumoto, Masahito Tagawa, Masao Akiyama

    This study evaluated effects of a low earth orbit (LEO) space environment on properties of a solid lubricant used for space applications. The tested lubricant was a bonded MoS2 film with organic binder. The film was exposed to a real LEO space environment aboard the International Space Station (ISS) by the Space Environment Exposure Device (SEED) experiment for about 1400 days. Additionally, it was irradiated individually with atomic oxygen (AO), ultraviolet rays (UV), and electron beam (EB) on the ground. Fluences of these factors corresponded to exposure to the LEO environment by the SEED experiment. Friction tests in vacuum and surface analyses were carried out for the samples. Tribological behavior of the different samples was measured using classical reciprocating pin-on-flat friction tests. Furthermore, XPS analysis was performed for the film surface and rubbing tracks of the samples. Results show that the friction coefficient decreased by AO irradiation at an early stage of the tests. It resembled the result of the film exposed to the real LEO environment.

    THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, Jun. 2009, Space Technology Japan, Vol.7, pp.Pc_31-Pc_36 (26), Pc_31 - Pc_36, English

    [Refereed]

    Scientific journal

  • Masahito Tagawa, Kumiko Yokota, Ken-ichi Maeda, Akitaka Yoshigoe, Yuden Teraoka

    Hyperthermal (kinetic energy of 10eV) fluorine atom beam interaction with highly oriented pyrolytic graphite (HOPG) was studied. Surface analytical results of atomic fluorine-exposed HOPG using synchrotron radiation photoelectron spectroscopy showed that the fluorine reaction was limited at the topmost HOPG(0001) layer. This is due to the fact that the kinetic energy of 10eV is not sufficient to penetrate graphite layer but is enough for breaking C-C bonds and forms CF and CF(2) functional groups through the beam-induced fluorination reactions. It was demonstrated that the use of hyperthermal energy in the range of 10eV is advantageous for damage-free modification of the topmost surface of carbon-based materials. (c) 2009 The Japan Society of Applied Physics

    JAPAN SOCIETY APPLIED PHYSICS, Jun. 2009, APPLIED PHYSICS EXPRESS, 2 (6), English

    [Refereed]

    Scientific journal

  • An experimental study on air breathing ion engine using a laser-detonation atomic oxygen beam source as LEO space environment simulator

    Masahito Tagawa, Kazutaka Nishiyama, Kumiko Yokota, Yasuo Yoshizawa, Daisaku Yamamoto, Hitoshi Kuninaka

    Jun. 2009, Proceedings of the 27th International Symposium on Space Technology and Science, USB Memory, English

    International conference proceedings

  • A consideration of future flight material exposure experiments in Japan: Advanced material exposure test working group’s proposal

    Masahito Tagawa, Kumiko Yokota, Mengu Cho, Minoru Iwata, Rikio Yokota, Mineo Suzuki, Koji Matsumoto, Yugo Kimoto, Eiji Miyazaki, Hiroyuki Shimamura

    Jun. 2009, Proceedings of the 27th International Symposium on Space Technology and Science, USB Memory, English

    International conference proceedings

  • 生体材料への細胞接着・増殖性におよぼす原子ビーム表面改質効果

    Kumiko Yokota, Chiaki Hiwa, Masahito Tagawa, Yoshikazu Nakai, Taiji Adachi

    May 2009, 電気学会研究会、量子・光デバイス研究会, pp.51-54., Japanese

    International conference proceedings

  • Yuichi Haruyama, Masahito Tagawa, Kumiko Yokota, Shinji Matsui

    May 2009, Japanese Journal of Applied Physics, Vol.48, 055505, English

    [Refereed]

    Scientific journal

  • Evaluation and application of the EUV emitted from a laser-detonation atomic oxygen space environmental simulator

    Masahito Tagawa, Kumiko Yokota, Mayuko Koga, Hiroaki Nishimura

    Apr. 2009, レーザーエネルギー学研究センター 平成20年度共同利用・共同研究成果報告書, pp177-178., English

    International conference proceedings

  • Kumiko Yokota, Masahito Tagawa, Akira Kitamura, Koji Matsumoto, Akitaka Yoshigoe, Yuden Teraoka

    The densities of hydrogen and carbon atoms in a hydrogenated diamond-like carbon (DLC) film exposed to a hyperthermal atomic oxygen beam were investigated by Rutherford backscattering spectroscopy (RBS) and elastic recoil detection analysis (ERDA). The hydrogen density in DLC decreased upon atomic oxygen beam exposure with collision energy as low as 2 eV, whereas an exposure greater than 3 eV was necessary to remove carbon atoms. A high-collision energy also led to hydrogen desorption in the deeper region of DLC. The surface density of hydrogen decreased 6% by atomic oxygen exposure, and was independent of the collision energy. Additionally, the non-bonded hydrogen, which could diffuse in DLC, was desorbed by the energy transfer from the atomic oxygen collisions. (C) 2009 Elsevier B. V. All rights reserved.

    ELSEVIER SCIENCE BV, Apr. 2009, APPLIED SURFACE SCIENCE, 255 (13-14), 6710 - 6714, English

    [Refereed]

    Scientific journal

  • Jianming Zhang, Ned F. Lindholm, Amy L. Brunsvold, Hari P. Upadhyaya, Timothy K. Minton, Masahito Tagawa

    A combination of beam-surface-scattering, quartz-crystal-microbalance, and surface-recession experiments was conducted to study the effects of various combinations of O atoms [in the O((3)P) ground state], Ar atoms, and vacuum ultraviolet (VUV) light on fluorinated ethylene-propylene copolymer (FEP) Tenon and poly(methyl methacrylate) (PMMA). A laser-breakdown source was used to create hyperthermal beams containing O and O(2) or Ar. A D(2) lamp provided a source of VUV light. O atoms with 4 eV of translational energy or less did not react with a pristine FEP Tenon surface. Volatile O-containing reaction products were observed when the O-atom energy was higher than 4.5 eV, and the signal increased with the O-atom energy. Significant erosion of FEP Teflon (similar to 20 % of Kapton H) was observed when it was exposed to the hyperthermal O/O(2) beam with an average O-atom energy of 5.4 ev. FEP Teflon and PMMA that were exposed to VUV light alone exhibited much less mass loss. Collision-induced dissociation by hyperthermal Ar atoms also caused mass loss, similar in magnitude to that caused by VUV light. There were no observed synergistic effects when VUV light or Ar bombardment was combined with O/O(2) exposure. For both FEP Tenon and PMMA, the erosion yields caused by simultaneous exposure to O/O(2) and either VUV light or Ar atoms could be approximately predicted by adding the erosion yield caused by O/O(2), acting individually, to the erosion yield caused by the individual action of either VUV light or Ar atoms.

    AMER CHEMICAL SOC, Mar. 2009, ACS APPLIED MATERIALS & INTERFACES, 1 (3), 653 - 660, English

    [Refereed]

    Scientific journal

  • Masahito Tagawa, Hiroaki Doi, Kumiko Yokota

    Atomic oxygen concentration technology was investigated with two types of concentrators. One is a "horn-type" and the other is a "multiple ring-type" concentrator. Both of them were designed with a computer simulation using a hard-cube model. It was made clear that the primary factor for limiting the concentration factor is the gas buildup near the focal point. In the ground test using a laser-detonation source, which gave an intense atomic oxygen beam pulse, the concentration factor of 2-3, which is lower than the theoretical expectations, is obtained. However, it is suggested that the low concentration factor is due to the recombination reaction of atomic oxygen into molecular oxygen by the high peak flux in the pulsed atomic oxygen beam. The flux limit of the concentration factor is not a case in the real low Earth orbit space environment, and the multiple ring-type concentrator can be expected to achieve a concentration factor of over 40 in low Earth orbit exposure condition.

    AMER INST AERONAUT ASTRONAUT, Mar. 2009, JOURNAL OF SPACECRAFT AND ROCKETS, 46 (2), 226 - 229, English

    [Refereed]

    Scientific journal

  • Jianming Zhang, Ned F. Lindholm, Amy L. Brunsvold, Hari P. Upadhyaya, Timothy K. Minton, Masahito Tagawa

    A combination of beam-surface-scattering, quartz-crystal-microbalance, and surface-recession experiments was conducted to study the effects of various combinations of O atoms [in the O((3)P) ground state], Ar atoms, and vacuum ultraviolet (VUV) light on fluorinated ethylene-propylene copolymer (FEP) Tenon and poly(methyl methacrylate) (PMMA). A laser-breakdown source was used to create hyperthermal beams containing O and O(2) or Ar. A D(2) lamp provided a source of VUV light. O atoms with 4 eV of translational energy or less did not react with a pristine FEP Tenon surface. Volatile O-containing reaction products were observed when the O-atom energy was higher than 4.5 eV, and the signal increased with the O-atom energy. Significant erosion of FEP Teflon (similar to 20 % of Kapton H) was observed when it was exposed to the hyperthermal O/O(2) beam with an average O-atom energy of 5.4 ev. FEP Teflon and PMMA that were exposed to VUV light alone exhibited much less mass loss. Collision-induced dissociation by hyperthermal Ar atoms also caused mass loss, similar in magnitude to that caused by VUV light. There were no observed synergistic effects when VUV light or Ar bombardment was combined with O/O(2) exposure. For both FEP Tenon and PMMA, the erosion yields caused by simultaneous exposure to O/O(2) and either VUV light or Ar atoms could be approximately predicted by adding the erosion yield caused by O/O(2), acting individually, to the erosion yield caused by the individual action of either VUV light or Ar atoms.

    AMER CHEMICAL SOC, Mar. 2009, ACS APPLIED MATERIALS & INTERFACES, 1 (3), 653 - 660, English

    [Refereed]

    Scientific journal

  • 大気吸入型イオンエンジン(ABIE)に関する実験的研究

    Masahito Tagawa, Kazutaka Nishiyama, Kumiko Yokota, Yasuo Yoshizawa, Daisaku Yamamoto, Hitoshi Kuninaka

    Jan. 2009, 平成20年度宇宙輸送シンポジウム, CD-ROM, Japanese

    International conference proceedings

  • 2008年度軌道上材料曝露実験高度化ワーキンググループ活動報告

    Masahito Tagawa, Kumiko Yokota, Mengu Cho, Minoru Iwata, Rikio Yokota, Mineo Suzuki, Koji Matsumoto, Yugo Kimoto, Hiroyuki Shimamura

    Jan. 2009, 第25回宇宙利用シンポジウム, pp.282-283, Japanese

    International conference proceedings

  • Problems and Recent Trends on Material Degradation Studies in a Real and Simulated Space Environmen

    Masahito Tagawa, Kumiko Yokota

    Dec. 2008, 5th Space Environment Conference, Vol.5, 66, English

    [Refereed]

    International conference proceedings

  • Selective etching of sp2 carbon in a diamond-like carbon film by hyperthermal atomic oxygen exposures

    Masahito Tagawa, Kumiko Yokota, Akira Kitamura, Koji Matsumoto, Akitaka Yoshigoe, Yuden Teraoka, Kazuhiro Kanda, Masahito Niibe

    Oct. 2008, 4th Vacuum and Surface Sciences Conference of Asia and Australia, pp.263., English

    International conference proceedings

  • Change in hydrogen amount in a diamond-like carbon film under hyperthermal atomic oxygen exposures

    Kumiko Yokota, Masahito Tagawa, Akira Kitamura, Koji Matsumoto, Akitaka Yoshigoe, Yuden Teraoka

    Oct. 2008, 4th Vacuum and Surface Sciences Conference of Asia and Australia, pp.264., English

    International conference proceedings

  • Koji Matsumoto, Masao Akiyama, Masahito Tagawa

    Aug. 2008, 真空, Vol.51, No.8, pp.554-558, Japanese

    [Refereed]

    Scientific journal

  • ERDA/RBS/SR-PES study on the effect of reactive atomic beam exposures to the hydrogenated diamond-like carbon films

    Masahito Tagawa, Kumiko Yokota, Akira Kitamura, Akitaka Yoshigoe, Yuden Teraoka

    Aug. 2008, 4th International Workshop on Reactions involving Oxidation & Hydrogen, 30-41, English

    International conference proceedings

  • Role of High-Impact Energy of O-Atom on the Material Degradation in a LEO Space Environment

    Masahito Tagawa, Kumiko Yokota

    Jul. 2008, Proceedings of the International Symposium on Rarefied Gas Dynamics, AIP Conference Proceedings 108, English

    [Refereed]

    International conference proceedings

  • Hyperthermal Atomic Beam Concentrators for Aerospace Applications

    Kumiko Yokota, Masahito Tagawa

    Jul. 2008, Proceedings of the International Symposium on Rarefied Gas Dynamics, AIP Conference Proceedings 108, English

    [Refereed]

    International conference proceedings

  • Kumiko Yokota, Masahito Tagawa, Akira Kitamura, Koji Matsumoto, Akitaka Yoshigoe, Yuden Teraoka, Julien Fontaine, Michel Belin

    Jun. 2008, Proceedings of the 26th International Symposium on Space Technology and Sciences, CD-ROM, English

    International conference proceedings

  • Masahito Tagawa, Kumiko Yokota

    The importance of space environmental effect on material is addressed. Some examples of the material degradation in a particular space environment are introduced. In order to endorse the material properties requested in a mission, ground-based studies are quite important. However, present deficient ground-based simulation technology cannot perform the accurate assessment of the material degradation in space. On the other hand, infrastructures for the material evaluation using Kibo and International Space Station, is now established after long desire of material scientists and engineers. However, we will face difficulty for retrieve the exposed sample by the retirement of Space Shuttle. Development of new material evaluation methods using small satellite without retrieving the samples and of the accurate ground-based simulation techniques are both highly desired to achieve low-risk missions.

    THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, Jun. 2008, Proceedings of the 26th International Symposium on Space Technology and Sciences, CD-ROM (26), Tr_2_21 - Tr_2_26, English

    International conference proceedings

  • Koji Matsumoto, Masahito Tagawa, Masao Akiyama

    Jun. 2008, Proceedings of the 26th International Symposium on Space Technology and Sciences, CD-ROM, English

    International conference proceedings

  • Effect of EUV from the oxygen plasma in the ground-based atomic oxygen test of fluorinated polymer

    Masahito Tagawa, Shingo Abe, Kazuhiro Kishida, Kumiko Yokota, Akio Okamoto

    Jun. 2008, Proceedings of the 26th International Symposium on Space Technology and Sciences, CD-ROM, English

    International conference proceedings

  • Tribological characteristics of bonded MoS2 film exposed to AO, UV and real LEO environment by SM/SEED experiment

    Koji Matsumoto, Masahito Tagawa, Masao Akiyama

    May 2008, Proceedings of 9th International Space Conference, Protection of Materials and Structures from the LEO Space Environment, AIP Conference Proceedings 108, English

    [Refereed]

    International conference proceedings

  • Synergistic effect of EUV from the laser-sustained oxygen plasma in the ground-based atomic oxygen simulation of fluorinated polymers

    Masahito Tagawa, Shingo Abe, Kazuhiro Kishida, Kumiko Yokota, Akio Okamoto

    May 2008, Proceedings of 9th International Space Conference, Protection of Materials and Structures from the LEO Space Environment, AIP Conference Proceedings 108, English

    [Refereed]

    International conference proceedings

  • Protection of diamond-like carbon films from an energetic atomic oxygen bombardment with Si-doping technology

    Kumiko Yokota, Masahito Tagawa, Akira Kitamura, Koji Matsumoto, Akitaka Yoshigoe, Yuden Teraoka, Julien Fontaine, Michel Belin

    May 2008, Proceedings of 9th International Space Conference, Protection of Materials and Structures from the LEO Space Environment, AIP Conference Proceedings 108, English

    [Refereed]

    International conference proceedings

  • Future Space Exposure Experiment beyond 2011 -Its Problems and New Challenges

    Masahito Tagawa

    Mar. 2008, Proceedings of International Symposium on SM/MPAC-SEED Experiment, JAXA-SP-08-015E, pp.171-176., English

    International conference proceedings

  • Evaluation of MoS2 Bonded Film Degradation on ISS SM-SEED Experiment

    Masao Akiyama, Masahito Tagawa, Koji Matsumoto

    Mar. 2008, Proceedings of International Symposium on SM/MPAC-SEED Experiment, JAXA-SP-08-015E, pp.127-130., English

    International conference proceedings

  • 摩擦誘起極改質ダイヤモンドライクカーボン薄膜の放射光/超音速分子線による非破壊評価

    Masahito Tagawa, Kumiko Yokota, Akitaka Yoshigoe, Yuden Teraoka, Koji Matsumoto

    Feb. 2008, 第3回JEAE放射光科学シンポジウム, pp.289-300, Japanese

    International conference proceedings

  • 低軌道宇宙環境下での材料曝露試験高度化のための原子状酸素収束化技術の開発

    Kumiko Yokota, Masahito Tagawa

    Jan. 2008, 第24回宇宙利用シンポジウム, pp.80-81, Japanese

    International conference proceedings

  • 軌道上材料曝露実験高度化ワーキンググループ活動報告

    Masahito Tagawa, Kumiko Yokota, Mineo Suzuki, Eiji Miyazaki, Hiroyuki Shimamura, Rikio Yokota, Koji Matsumoto, Mengu Cho, Minoru Iwata

    Jan. 2008, 第24回宇宙利用シンポジウム, pp.78-79, Japanese

    International conference proceedings

  • Erosion properties of polyimide as a monitoring material of atomic oxygen environment in space (3): Synergistic effect of atomic oxygen and ultraviolet

    Masahito Tagawa, Kumiko Yokota

    Jan. 2008, 第4回宇宙環境シンポジウム報告書, JAXA-SP-07-030, pp.121-124., English

    International conference proceedings

  • Masahito Tagawa, Kumiko Yokota

    Effect of relative intensity of atomic oxygen and vacuum ultraviolet (UV) in the synergistic effect of polyimide erosion was investigated. The relative intensity of atomic oxygen and UV was adjusted by rotating the polyimide sample at the crossover point of the beam axes of atomic oxygen and UV which crossed 90 degrees. The erosion rate of polyimide was measured by a quartz crystal microbalance. It was confirmed that the UV exposure at the atomic oxygen-exposed polyimide promoted the desorption of carbon oxides from the surface. In contrast, no mass change was detected when UV irradiated the polyimide surface without simultaneous atomic oxygen exposure. By changing the relative intensity of atomic oxygen and UV, increase in erosion rate up to 400% was observed when relative UV intensity is high. (c) 2007 Elsevier Ltd. All rights reserved.

    PERGAMON-ELSEVIER SCIENCE LTD, Jan. 2008, ACTA ASTRONAUTICA, 62 (2-3), 203 - 211, English

    [Refereed]

    Scientific journal

  • M. Tagawa, K. Yokota, K. Matsumoto, M. Suzuki, Y. Teraoka, A. Kitamura, M. Belin, J. Fontaine, J-M. Martin

    Effect of 5 eV atomic oxygen beam exposure on the surface properties of sputter-deposited molybdenum disulfide (MoS(2)) and diamond-like carbon lubrication films is experimentally evaluated with relevance to space environmental effect in low Earth orbit. X-ray photoelectron spectra indicate that the loss of sulfur and oxidation of molybdenum at the atomic oxygen-exposed MoS(2) surface are significant. Depth profiles of sulfur and molybdenum indicate that the oxidation is restricted within 3 nm from the surface. This is due to the fact that Mo oxide plays as a protective layer against further atomic oxygen attack. The surface oxidation affects the friction coefficient, however it is recovered with sliding. Due to the delamination of oxide layer, wear-life of the film is reduced dramatically by certain exposure conditions. On the other hand, no severe oxidation states of carbon atoms are detected at DLC surface from the synchrotron radiation photoemission spectra. In contrast, loss of the DLC film itself is measured by Rutherford backscattering spectroscopy. These analytical results can be explained by the oxidative gasification of carbon atoms at DLC surface. (c) 2007 Elsevier B.V. All rights reserved.

    ELSEVIER SCIENCE SA, Dec. 2007, SURFACE & COATINGS TECHNOLOGY, 202 (4-7), 1003 - 1010, English

    [Refereed]

    Scientific journal

  • Fluorination of PMDA-ODA Polyimide using Hyperthermal Atomic Fluorine Beams

    Tagawa Masahito, Yokota Kumiko, Maeda Kenichi, Yoshigoe Akitaka, Teraoka Yuden, Akamatsu Kensuke, Nawafune Hidemi

    Nov. 2007, 5th International Conference on Polyimides and Other High Temperature Polymers, pp. 43, English

    International conference proceedings

  • Durability of a Silicon-Containing Polyimide in a Simulated Low Earth Orbit Space Environment

    Yokota Kumiko, Tagawa Masahito, Iwata Minoru, Miyazaki Eiji, Ishizawa Jun-ichiro, Suzuki Mineo, Yokota Rikio

    Nov. 2007, 5th International Conference on Polyimides and Other High Temperature Polymers, pp. 26, English

    International conference proceedings

  • Masahito Tagawa, Ken-ichi Maeda, Tadashi Kajita, Kumiko Yokota, Kensuke Akamatsu, Hidemi Nawafune

    Metallization methods of polyimide by hyperthermal atomic oxygen and atomic fluorine beams were developed. An atomic fluorine beam with atranslational energy of 6.2 eV modified the wettability of polyimide surfaces to provide an advancing water contact angle of 132 degrees. It was confirmed that in-air storage for 2 months did not alter the hydrophobic property created by the atomic fluorine beam. This stable bearn-indUced surface fluorination technique was then applied to site-selective electroless Cu platingon polyimide. Itwas demonstrated thatchanging the exposure sequence could create both positive- and negative-type plating processes.

    AMER CHEMICAL SOC, Nov. 2007, LANGMUIR, 23 (23), 11351 - 11354, English

    [Refereed]

    Scientific journal

  • 複合宇宙環境下における材料劣化現象とそのコンタミネーションソースとしての可能性

    YOKOTA Kumiko, TAGAWA Masahito

    Sep. 2007, 第1回コンタミネーション管理技術ワークショップ, pp. 51-61, Japanese

    International conference proceedings

  • Yamada Noriko, Kanda Kazuhiro, Yokota Kumiko, Tagawa Masahito, Niibe Masato, Haruyama Yuichi, Matsui Shinji

    Sep. 2007, 20th International Microprocesses and nanotechnology Conference, pp. 166-167, English

    International conference proceedings

  • Performance alteration of MoS2 solid lubricant due to long exposure duration to LEO space environment aboard ISS

    Matsumoto Koji, Belin Michel, Fontaine Julien, Le Mogne Thierry, Suzuki Mineo, Tagawa Masahito

    Sep. 2007, 34th Leeds-Lyon Symposium, pp. 100, English

    International conference proceedings

  • MoS2焼成膜

    AKIYAMA Masao, KISHI Katsuhiro, TAGAWA Masahito, MATSUMOTO Koji

    Aug. 2007, 国際宇宙ステーションロシアサービスモジュール利用微小粒子捕獲実験及び材料曝露実験回収試料評価結果第2回中間報告会, JAXA-SP-06-021, pp.35-36, Japanese

    International conference proceedings

  • Masahito Tagawa, Kumiko Yokota, Shinnosuke Tsumamoto, Chie Sogo, Akitaka Yoshigoe, Yuden Teraoka

    A direct oxidation reaction of Si atoms on a Si(001) surface was studied by ellipsometry and synchrotron radiation photoemission spectroscopy. In situ ellipsometry measurements when exposed to 2.7-5.0 eV O atom beams indicated that oxide growth follows a linear relationship with an O atom fluence up to an oxide thickness of 0.6-0.7 nm. In contrast, the limit of linear growth was 0.3 nm in the case of the 1.8 eV beam. These results suggest that the backbonds of Si atoms in the first layer are directly oxidized by O atom with a translational energy between 2.7 and 5.0 eV. (C) 2007 American Institute of Physics.

    AMER INST PHYSICS, Jul. 2007, APPLIED PHYSICS LETTERS, 91 (3), English

    [Refereed]

    Scientific journal

  • 二硫化モリブデン焼成膜の宇宙環境曝露による特性変化

    MATSUMOTO Koji, AKIYAMA Masao, TAGAWA Masahito

    Jun. 2007, 日本真空協会研究例会, pp. 25-29, Japanese

    International conference proceedings

  • Potential hazards on the oxidation reaction of satellite materials in the extreme environments in spac

    Tagawa Masahito, Yokota Kumiko

    May 2007, 3rd International Workshop on Oxidation Reactions, pp. 33-45, English

    International conference proceedings

  • 低軌道宇宙環境下での材料曝露試験高度化のための原子状酸素収束化技術の開発

    TAGAWA Mashito, YOKOTA Kumiko

    Apr. 2007, 日本マイクログラビティ応用学会誌, Vol.24, No.2, pp. 188-193, Japanese

    [Refereed]

    Scientific journal

  • Low Earth Orbit Space Environmental Effects on MoS2/DLC Lubrication Films

    Tagawa Masahito, Yokota Kumiko, Matsumoto Koji, Belin Michel

    Apr. 2007, International Conference on Metallurgical coatings and thin films, 10, English

    International conference proceedings

  • 低軌道宇宙環境下におけるダイヤモンドライクカーボンの表面損傷と膜内水素量変化について

    TAGAWA Masahito, YOKOTA Kumiko, KITAMURA Akira, YOSHIGOE Akitaka, TERAOKA Yuden

    Mar. 2007, 第2回JAEA放射光科学シンポジウム, pp.323-334, English

    International conference proceedings

  • 低軌道宇宙環境下におけるダイヤモンドライクカーボンの表面損傷と膜内水素量変化について

    Masahito Tagawa, Kumiko Yokota, Akira Kitamura, Akitaka Yoshigoe, Yuden Teraoka

    Mar. 2007, 第2回JAEA放射光科学シンポジウム講演予稿集, 323-334, Japanese

    International conference proceedings

  • SEED flight samples-

    Tagawa Masahito, Yokota Kumiko, Akiyama Masao, Matsumoto Koji, Suzuki Mineo

    Mar. 2007, Workshop on Micro- and Nano Engineering for Aerospace Systems, 157, English

    [Refereed]

    International conference proceedings

  • Kumiko Yokota, Masahito Tagawa

    Synergistic effect on atomic oxygen-induced erosion of polyethylene and polyimide with 172 nm monochromatic ultraviolet exposure was compared. The erosion of these materials was measured by a quartz crystal microbalance under 5 eV simultaneous atomic oxygen and ultraviolet exposures. The effect of simultaneous ultraviolet exposure on the atomic oxygen-induced erosion was observed at the ultraviolet intensity of 0.5-2.6 x 10(-15) mJ/atom for polyethylene. In contrast, the similar effect was observed in polyimide at the relative ultraviolet intensities one order greater than that of polyethylene. It was found that the effect of 172 nm ultraviolet was different in polyimide and polyethylene, i.e., photoinduced erosion was observed only for polyethylene. It was concluded that polyimide is less sensitive with simultaneous ultraviolet exposure during atomic oxygen bombardment, and thus evaluated as a better material for measuring atomic oxygen fluence.

    AMER INST AERONAUT ASTRONAUT, Mar. 2007, JOURNAL OF SPACECRAFT AND ROCKETS, 44 (2), 434 - 438, English

    [Refereed]

    Scientific journal

  • 第2回JAEA放射光科学シンポジウム講演予稿集

    Masahito Tagawa, Kumiko Yokota, Akira Kitamura, Akitaka Yoshigoe, Yuden Teraoka

    Jan. 2007, 低軌道宇宙環境下におけるダイヤモンドライクカーボンの表面損傷と膜内水素量変化について, 323, Japanese

    [Refereed]

    International conference proceedings

  • Ryoma Hayakawa, Mari Nakae, Takeshi Yoshimura, Atsushi Ashida, Norifumi Fujimura, Tsuyoshi Uehara, Masatoshi Tagawa, Yuden Teraoka

    A detailed structural analysis and dielectric property measurements of silicon nitride films fabricated using atmospheric pressure (AP) plasma were carried out, and the results were compared to those of nitride films fabricated using a radio frequency plasma. Using AP plasma, 1.8-nm-thick silicon nitride films composed of Si(3)N(3.5)O(0.7) were obtained at nitridation temperatures ranging from 25 to 500 degrees C. X-ray photoelectron spectroscopy using a monochromatic Al K alpha source at 1486.6 eV and high-resolution Rutherford backscattering spectrometry revealed approximately 10% more nitrogen atoms corresponding to the N-Si(3) bond in the film using AP plasma than those using rf plasma. In the range of 25-500 degrees C, the nitridation temperature did not affect the leakage current densities of the films fabricated using AP plasma. Films fabricated at 25 degrees C showed leakage current density of as low as 7x10(-2) A/cm(2) at 5 MV/cm. This value was one order of magnitude lower than that using rf plasma. The direct-tunneling current simulation analysis with the Wentzel-Kramers-Brillouin approximation revealed that the effective tunneling mass of holes increased due to the nitrogen atoms incorporated in the films. From deep-level transient spectroscopy, signals attributed to defects generated by plasma irradiation in the silicon substrate were not observed. (c) 2006 American Institute of Physics.

    AMER INST PHYSICS, Oct. 2006, JOURNAL OF APPLIED PHYSICS, 100 (7), English

    [Refereed]

    Scientific journal

  • A comparison of ultra-thin SiO2 films formed by hyperthermal O-atom beam and rapid thermal oxidation; synchrotron radiation photoemission and crystal truncation rod scattering study

    TAGAWA Masahito, YOKOTA Kumiko, YOSHIGOE Akitaka, TERAOKA Yuden, SHIMURA Takayoshi

    Sep. 2006, Applied Physics Letters, 88, 133512, English

    [Refereed]

    Scientific journal

  • Masahito Tagawa, Koshi Matsumoto, Hiroaki Doi, Kumiko Yokota

    Feasibility of atomic oxygen concentration in low Earth orbit space environment for material testing was studied. To maximize the concentration efficiency, trajectories of the atomic oxygen reflected at the reflector surface were computer-simulated based on the Hard-Cube model, which can deal with inelastic scattering events at the solid surface. The difference in incident and exit angles was predicted to be at most 5 deg depending on the incident angle. The computational results were compared with the experimental results using a 5 eV hyperthermal atomic oxygen beam. A good correlation between the numerical and experimental, results was identified. It was experimentally demonstrated that the atomic oxygen flux could be increased six times greater than its original value with three reflective mirrors.

    AMER INST AERONAUT ASTRONAUT, Sep. 2006, JOURNAL OF SPACECRAFT AND ROCKETS, 43 (5), 999 - 1003, English

    [Refereed]

    Scientific journal

  • Synthesis of onion-like carbon and its microtribological properties

    J. Hiraki, 木之下 博, 田川 雅人, 大前 伸夫

    2006, Synopses of the International Tribology Conference Kobe (2005), E-01, English

    [Refereed]

    Scientific journal

  • LPI法によるナノ形状セラミックスの高感度ガスセンサへの適用

    出来 成人, 水畑 穣, 梶並 昭彦, 大前 伸夫, 田川 雅人, 横田 久美子, 竹内 俊文, 石川 博, 蔡 奎千, 前川 享, 前田 浩一, 齋藤 靖弘, 関口 幸成, 小林 哲彦, 木内 正人, 桜井 宏昭, 山中 直樹, 山口 寿一

    Mar. 2005, 地域新生コンソーシアム研究開発事業 平成16年度報告書, 全24p, Japanese

    Scientific journal

  • 表面帯電時における原子状酸素誘起高分子エロージョン

    YOKOTA kumiko, TAGAWA Masahito

    2005, 第1回宇宙環境シンポジウム報告書, JAXA-SP-04-010, pp.156-162, Japanese

    International conference proceedings

  • 低地球軌道上の原子状酸素利用に向けての収束化技術の開発 (3)

    TAGAWA Masahito, YOKOTA Kumiko

    2005, 第21回宇宙利用シンポジウム講演予稿集, 2005, pp.168-169, Japanese

    International conference proceedings

  • 低地球軌道上の原子状酸素によるシリコン酸化膜形成とその特徴 (2)

    TAGAWA Masahito, YOKOTA Kumiko, YOSHIGOE Akitaka, TERAOKA Yuden

    2005, 第21回宇宙利用シンポジウム講演予稿集, pp.166-16, Japanese

    International conference proceedings

  • YOKOTA kumiko, TAGAWA Masahito, IKEDA Kohei, OKAMOTO Akio

    A quantitative analysis in erosion properties of polyimide and fluorinated ethylene propylene (FEP) under simulated low earth orbit space environment of atomic oxygen and ultraviolet was performed. An atomic oxygen environment was simulated by a laser detonation atomic oxygen beam source, whereas that of ultraviolet was made by a 172 nm-eximer light. Increase in erosion rate up to 400 % was observed on polyimide when relative ultraviolet intensity is high. In contrast, no synergistic effect was observed on FEP in tested conditions. X-ray photoelectron spectroscopy revealed that atomic oxygen did not accommodate on FEP surfaces even after atomic oxygen exposures, in contrast, increase in surface oxygen concentration was detected at the polyimide surfaces. These experimental results suggest that ultraviolet-induced desorption of reactive products, which was an origin of synergistic effect on polyimide, does not occur at the FEP surface.

    High Temperature Society of Japan, 2005, 高温学会誌, Vol.31, No.5, 318-323 (5), 318 - 323, Japanese

    [Refereed]

    Scientific journal

  • レーザーデトネーション誘起高速原子ビーム励起表面反応

    TAGAWA Masahito

    2005, 量子ビーム理工学研究最前線-その現状と今後の展望- 報告書, pp.170-180., Japanese

    International conference proceedings

  • Surface degradation of polymeric materials under hyperthermal atomic oxygen beam bombardment; temperature dependence

    横田 久美子, Seikyu S, 大前 伸夫, 田川 雅人

    2005, International Symposium on Applications of Quantum Beam 2005, (2005) 221-222, English

    [Refereed]

    Scientific journal

  • Surface degradation of polymeric materials under hyperthermal atomic oxygen beam bombardment; temperature dependenc

    YOKOTA Kumiko, SEIKYU Shinsuke, OHMAE Nobuo, TAGAWA Masahito

    2005, International Symposium on Applications of Quantum Beam 2005, pp.221-222, English

    International conference proceedings

  • Surface and tribological properties of the MoS2-based lubricants retrieved from real LEO space environment: the first and second year results obtained by SM/SEED

    AKIYAMA Masao, MATSUMOTO Koji, IMAGAWA Kichiro, ASADA Hidetoshi, OCHI Kazataka, YOKOTA Kumiko, TAGAWA Masahito

    2005, Proceedings of the 11th European Space Mechanisms and Tribology Symposium, pp.347-353, English

    International conference proceedings

  • Photoemission spectroscopy with synchrotron radiation for nitrogen-impinged Si(001) surfaces with an ultra-thin-SiO2 overlaye

    HACHIUE Syunsuke, TERAOKA Yuden, TAGAWA Masahito

    2005, Proceedings of the 11th European Conference on Applications of Surface and Interface, in CD-ROM, English

    International conference proceedings

  • Passive oxidation of Si(001) by hyperthermal atomic oxygen beam -A synchrotron radiation photoemission spectroscopic study

    TAGAWA Masahito, SOGO Chie, MIYAGAI Suguru, YOKOTA Kumiko, YOSHIGOE Akitaka, TERAOKA Yuden

    2005, International Symposium on Applications of Quantum Beam 2005, pp.223-224, English

    International conference proceedings

  • 木之下 博, I. Kume, 田川 雅人, 大前 伸夫, V. Turq, J. M. Martin

    2005, Synopses of the International Tribology onference Kobe (2005), P-19, English

    [Refereed]

    Scientific journal

  • Effect of Atomic Oxygen on The Mechanical and Surface Properties of Kevlar Fibers

    G. Lipika, N. Yokoi, 大前 伸夫, 横田 久美子, 田川 雅人

    2005, Synopses of the International Tribology Conference Kobe (2005), P-108, English

    [Refereed]

    Scientific journal

  • Changes in Tribological Properties of MoS2 film exposed to LEO on SM/SEED

    MAATSUMOTO Koji, IMAGAWA Kichiro, AKIYAMA Masao, TAGAWA Masahito

    2005, Proceedings of World Tribology Congress-III, in CD-ROM, English

    International conference proceedings

  • Atomic oxygen-induced polymer degradation phenomena in simulated LEO space environments: How do polymers react in a complicated space environment

    TAGAWA Masahito, YOKOTA Kumiko

    2005, Proceedings of the 56th International Astronautical Congress, in CD-ROM, English

    International conference proceedings

  • Atomic oxygen-induced erosion of spacecraft materials -Potential hazards for spacecraft systems- (Plenary)

    TAGAWA Masahito

    2005, Proceedings of the 9th Spacecraft Charging Technology Conference, in CD-ROM, English

    International conference proceedings

  • Atomic oxygen-induced erosion of polymeric materials under surface charging condition

    横田 久美子, 大前 伸夫, Seikyu S, 田川 雅人

    2005, Proceedings of the 9th Spacecraft Charging Technology Conference, (2005) CD-ROM, English

    [Refereed]

    Scientific journal

  • TAGAWA Masahito, SOGO Chie, YOKOTA Kumiko, HACHIUE Syunsuke, YOSHIGOE Akitaka, TERAOKA Yuden

    2005, Jpn. J. Appl. Phys, Vol.44, No.12, pp.8300-8304, English

    [Refereed]

    Scientific journal

  • KINOSHITA Hiroshi, KUME Ippei, SAKAI Hirofumi, TAGAWA Masahito, OHMAE Nobuo

    Dec. 2004, Carbon, 42, 12-13, 2753-2455, English

    [Refereed]

    Scientific journal

  • KINOSHITA Hiroshi, KUME Ippei, TAGAWA Masahito, OHMAE Nobuo

    American Institute of Physics (AIP), Aug. 2004, Applied Physics Letters, 85, 14, 2780-2781 (14), 2780 - 2781, English

    [Refereed]

    Scientific journal

  • K Yokota, N Ohmae, M Tagawa

    A quantitative study of the synergistic effect of 5 eV atomic oxygen and 172 nm vacuum ultraviolet radiation exposure was carried out on polyimide samples. The relative intensity of atomic oxygen and ultraviolet was adjusted by rotating the polyimide sample at the crossover point of the beam axes of atomic oxygen and ultraviolet which crossed 90degrees. The erosion rate of polyimide was calculated from the resonant frequency of the quartz crystal microbalance on which the polyimide was spin-coated. It was confirmed that the ultraviolet exposure to the atomic oxygen-exposed polyimide promoted the desorption of carbon oxides from the surface. In contrast, no mass change was detected when ultraviolet irradiated the polyimide surface without atomic oxygen exposure. By changing the relative intensity of atomic oxygen and ultraviolet, increases in erosion rates up to 400% were observed when the relative ultraviolet/atomic oxygen flux intensity reached 10(-14) mJ atom(-1).

    SAGE PUBLICATIONS LTD, Jun. 2004, HIGH PERFORMANCE POLYMERS, 16 (2), 221 - 234, English

    [Refereed]

    Scientific journal

  • 低地球軌道上の原子状酸素環境利用に向けての収束化技術の開発(2)

    TAGAWA Masahito, YOKOTA Kumiko, OHMAE Nobuo

    2004, 第20回宇宙利用シンポジウム講演予稿集, 312-315, Japanese

    International conference proceedings

  • 低地球軌道上の原子状酸素にりよるシリコン酸化膜形成とその特徴

    YOKOTA kumiko, OHMAE Nobuo, TAGAWA Masahito

    2004, 第20回宇宙利用シンポジウム講演予稿集, 308-311, Japanese

    Scientific journal

  • 低軌道宇宙環境に曝露した固体潤滑剤のトライボロジー特性評価

    MATSUMOTO Koji, AKIYAMA Masao, KISHI Katsuhiro, TAGAWA Masahito

    2004, 独立行政法人宇宙航空研究開発機構 第2回総合技術研究本部 公開研究発表会前刷集, 127-130, Japanese

    International conference proceedings

  • 円周走査型原子間力顕微鏡の開発

    木之下 博, 酒向 智也, 田川 雅人, 大前 伸夫, 小宮 広志

    2004, トライボロジスト, 49, 11, 886-893, Japanese

    [Refereed]

    Scientific journal

  • Synergistic study on atomic oxygen-induced erosion of polyethylene with 172 nm vaccum ultraviolet

    TAGAWA Masahito, YOKOTA K, OHMAE Nobuo

    2004, Journal of Spacecraft and Rockets, 41, 3, 345-349, English

    [Refereed]

    Scientific journal

  • Surface Reaction of Atomic Oxygen with Spin-Coated Polymide Films: Temperature Dependence of the Reaction Efficienc

    SEIKYU Shinsuke, YOKOTA Kumiko, TAGAWA Masahito, OHMAE Nobuo

    2004, Proceedings of the 24th International Symposium on Space Technology and Science, Paper No.2004-c-39, English

    [Refereed]

    International conference proceedings

  • TAGAWA Masahito, YOKOTA K, OHKI Y, OHMAE Nobuo

    2004, Journal of Adgesion Science and Technology, 18, 2, 243-260, English

    [Refereed]

    Scientific journal

  • TAGAWA Masahito, YOKOTA K, OHMAE Nobuo, MATSUMOTO K, SUZUKI M

    2004, Tribology Letters, 17, 4, 859-865, English

    [Refereed]

    Scientific journal

  • H Kinoshita, Kume, I, H Sakai, M Tagawa, N Ohmae

    PERGAMON-ELSEVIER SCIENCE LTD, 2004, CARBON, 42 (12-13), 2753 - 2756, English

    [Refereed]

    Scientific journal

  • Enhancement of atomic Oxygen-induced Erosion of Polymide under Simultaneous Vacuum Ultraviolet Exposure Conditions ; A Quantitative Study

    YOKOTA Kumiko, SEIKYU Shinsuke, TAGAWA Masahito, OHMAE Nobuo

    2004, Proceedings of the 24th International Symposium on Space Technology and Science, Paper No.2004-c-38, English

    [Refereed]

    International conference proceedings

  • Energy accommodation in hyperthermal gas-surface collisions: relevance to aerobraking planetary atmosphere

    MINTON Timothy. K, TAGAWA Masahito, Nathanson Gilbert M

    2004, Journal of Spacecraft and Rockets, 41, 3, 389-396, English

    [Refereed]

    Scientific journal

  • Ellipsometric Study on the Oxidation of silicon by atomic Oxygen in Space Environment

    SOGO Chie, TSUMAMOTO Shinnosuke, YOKOTA Kumiko, TAGAWA Masahito, OHMAE Nobuo

    2004, Proceedings of the 24th International Symposium on Space Technology and Science, Paper No.2004-h-02, English

    [Refereed]

    International conference proceedings

  • TAGAWA Masahito, IKEMURA Masashi, NAKAYAMA Yoshihito, OHMAE Nobuo

    2004, Tribology Letters, 17, 3, 575-580, English

    [Refereed]

    Scientific journal

  • A computer Simulation of the Surface Scattering Event of Energetic Atomic Oxygen for Developing Atomic Oxygen Concentrator

    DOI Hiroaki, YOKOTA Kumiko, TAGAWA Masahito, OHMAE Nobuo

    2004, Proceedings of the 24th International Symposium on Space Technology and Science, Paper No.2004-h-03, English

    [Refereed]

    International conference proceedings

  • K Gotoh, Y Nakata, M Tagawa, M Tagawa

    Effects of the exposure of ultraviolet (UV) excimer light on the physicochemical surface properties of polymer films were investigated by contact angle measurements and X-ray photoelectron spectroscopy (XPS). The UV light at wavelength of 172 nm was exposed to polyethylene (PE), polyimide (PI), and polytetrafluoroethylene (PTFE) films in ambient air. The advancing and receding contact angles of water on the unexposed and UV-exposed films were determined by the sessile drop and the Wilhelmy methods as a measure of the wettability. For the PE and PI films, remarkable decrease in the water contact angle was accomplished by the UV exposure of several or several 10 s. The XPS data showed that such increase in the wettability was attributed to the increased atomic oxygen concentration at the film surfaces. The wettability of the PTFE film did not change due to the UV exposure. When the UV-exposed PE and PI films were stored in ambient air, the increase in the water contact angle, i.e. the hydrophobic recovery, was observed over a time scale of several days. It was suggested that the gasification of the low-molecular weight oxidized materials as well as the reorientation and the migration of polymer chains in the oxidized surface layer was responsible for the hydrophobic recovery in air. The UV exposure was also attempted to the PI film being covered with a metal mesh to prepare the film having both non-exposed and UV-exposed surface regions. The differences in the advancing and receding contact angles between the both regions were observed on the continuous weight recording at constant interfacial moving velocity by the Wilhelmy method. The Wilhelmy method in combination with the UV lithography technique enabled the simultaneous evaluation of the wettabilities of the treated and untreated surfaces. (C) 2003 Elsevier B.V. All rights reserved.

    ELSEVIER SCIENCE BV, Aug. 2003, COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, 224 (1-3), 165 - 173, English

    [Refereed]

    Scientific journal

  • ADACHI Taiji, KAJITA Fumiaki, SATO Katsuya, MATSUMOTO Koshi, TAGAWA Masahito

    2003, 日本機械学会論文集A編, 69(688),118-124, Japanese

    [Refereed]

    Scientific journal

  • Wear-life of the molybdenum disulfide sputtered film under hyperthermal atomic oxygen bombardment : in-situ wear-life evaluations.

    TAGAWA Masahito, MUROMOTO M, HACHIUE S, YOKOTA Kumiko, OHMAE Nobuo, MATSUMOTO K, SUZUKI M

    2003, Proceedings of the 10th European Space Mechanism and Trigology Conference, ESA SP-524,311-314, English

    International conference proceedings

  • YOKOTA Kumiko, TAGAWA Masahito, OHMAE Nobuo

    2003, Journal of Spacecraft and Rockets., Vol.40,No.1,143-144, English

    [Refereed]

    Scientific journal

  • A quantitative study in synergistic effects of atomic oxygen and ultraviolet regarding polymer erosion in LEO space environment.

    YOKOTA Kumiko, SEIKYU S, TAGAWA Masahito, OHMAE Nobuo

    2003, Proceedings of the 9th International Symposium on Materials in a Space., ESA SP-540,265-272, English

    International conference proceedings

  • Application of quartz crystal microbalance for polymer degradation studies regarding atomic oxygen activities in low earth orbit.

    TAGAWA Masahito, YOKOTA Kumiko, KINOSHITA H, OHMAE Nobuo

    2003, Proceedings of the 9th International Symposium on Materials in a Space., ESA SP-540,247-252, English

    International conference proceedings

MISC

  • オーガナイズドセッション:宇宙材料の熱物性とシステムデザイン

    田川 雅人, 太刀川 純孝, 島崎 一紀

    2012, 熱物性, 26 (1), 34, Japanese

    [Refereed]

    Meeting report

  • Evaluation and application of the EUV emitted from a laser-detonation atomic oxygen space environmental simulator: FY2011 repor

    M. Tagawa, K. Yokota, H. Shimamura, Y. Kimoto, M. Koga, H. Nishimura

    2012, 大阪大学レーザーエネルギー学研究センター平成22年度共同利用・共同研究成果報告書, 201 - 202, English

    Meeting report

  • Mechanistic studies of atomic oxygen reactions with polymers and combined effects with vacuum ultraviolet light

    Masahito Tagawa, Minton Timothy

    Jan. 2010, MRS Bulletin, Vol.35, No.1, pp.35-40, English

    [Refereed]

    Introduction scientific journal

  • 並進エネルギーアシストCVDによる機能性薄膜の室温反応形成技術

    Masahito Tagawa

    Mar. 2008, 平成18年度学術研究支援事業研究成果報告書, ひょうご科学技術協会、pp59-64, Japanese

    Others

  • 超熱原子状酸素ビームにより室温酸化したシリコン酸化膜の表面構造解析

    TAGAWA Masahito, YOKOTA Kumiko, SOGO Chie, HACHIUE Syunsuke, TERAOKA Yuden

    2005, 文部科学省ナノテクノロジー総合支援プロジェクト SPring-8 研究成果報告書, Vol.5 (2005) pp.2-5, Japanese

    Others

  • 超熱原子・分子線により室温処理したシリコン酸窒化膜の表面解析,

    TAGAWA Masahito, YOKOTA Kumiko, SOGO Chie, TERAOKA Yuden

    2005, 文部科学省ナノテクノロジー総合支援プロジェクト SPring-8 研究成果報告書, Vol.6 (2005) pp.2-5, Japanese

    Report scientific journal

  • 宇宙技術の向上を目指して

    TAGAWA Masahito

    2005, 神戸大学最前線, 25, Japanese

    Others

  • 宇宙環境における材料表面科学

    TAGAWA Masahito

    2005, 高温学会誌, Vol.31, No.5, 271-276, Japanese

    [Refereed]

    Introduction scientific journal

  • Surface analysis of silicon oxynitride film formed by the hyperthermal atomic beam at room temperature

    TAGAWA Masahito, YOKOTA Kumiko, SOGO Chie, TERAOKA Yuden

    2005, SPring-8 User experiment report, Vol.15, (2005) pp.128, English

    Report scientific journal

  • LPI法によるナノ形状セラミックスの高感度ガスセンサへの適用

    出来 成人, 水畑 穣, 梶並 昭彦, 大前 伸夫, 田川 雅人, 横田 久美子, 竹内 俊文, 石川 博, 葵 奎千, 前川 享, 前田 浩一, 齊藤 靖弘, 関口 幸成, 小林 哲彦, 木内 正人, 桜井 宏昭, 山中 直樹, 山口 寿一

    Mar. 2004, 地域新生コンソーシアム研究開発事業 地域申請コンソーシアム研究開発 平成15年度成果報告書, 未記入, Japanese

    Others

  • 私たちの暮らしを守る宇宙技術の向上をめざして

    TAGAWA Masahito

    2004, 平成16年度 第22回神戸大学工学部公開講座, 57-62, Japanese

    [Refereed]

    Others

  • 宇宙環境と表面分析

    TAGAWA Masahito

    2004, イオン工学ニュース, 57, 12-13, Japanese

    Introduction scientific journal

  • レーザーデトネーションを用いた超高度原子ビームの創成とその光学的応用

    田川 雅人

    2004, 倉田奨学金研究報告, 34, 33-34, Japanese

    Report scientific journal

  • Young-Dupreの式

    TAGAWA Masahito

    2004, トライボロジスト, 49(6),499-500, Japanese

    [Refereed]

    Introduction scientific journal

  • レーザーデトネーション誘起超音速原子ビームを用いた低損傷表面改質技術

    田川 雅人

    2003, 財団法人 ひょうご科学技術協会平成14年度学術研究支援事業 研究成果報告書, 75-79, Japanese

    Others

Books etc

  • 宇宙機の熱設計

    Masahito Tagawa

    Joint editor, 名古屋大学出版会, Feb. 2014, Japanese, abbreviated, ISBN: 9784815807580

    Scholarly book

  • 宇宙機の熱設計

    Ohnishi Akira, Sugita Hiroyuki, Tagawa Masahito

    Joint work, 名古屋大学出版会, 2014, Japanese, ISBN: 9784815807580

    Scholarly book

  • 新版固体潤滑ハンドブック

    Masahito Tagawa

    Joint work, 養賢堂, Mar. 2010, Japanese

    Scholarly book

  • 熱物性ハンドブック

    Masahito Tagawa

    Joint work, 養賢堂, Apr. 2008, Japanese

    Scholarly book

  • Enhancement of atomic oxygen-induced erosion of spacecraft polymeric materials by simultaneous ultraviolet exposure

    TAGAWA Masahito, YOKOTA Kumiko, OHMAE Nobuo

    Joint work, Springer, Apr. 2006, English

    Scholarly book

  • Atomic oxygen concentration using reflecting mirrors

    TAGAWA Masahito, YOKOTA Kumiko, OHMAE Nobuo, MATSUMOTO Koshi, DOI Hiroaki

    Joint work, Springer, Apr. 2006, English

    Scholarly book

  • DLC膜ハンドブック

    TAGAWA Masahito

    Joint work, NTS, Feb. 2006, Japanese

    Scholarly book

  • Effect of surface charging on the erosion rate of polyimide under 5 eV atomic oxygen beam exposures

    SEIKYU Shinsuke, MAEDA Ken-ichi, YOKOTA Kumiko, OHMAE Nobuo, TAGAWA Masahito

    Joint work, Elsevier, 2006, English

    Scholarly book

  • Polyimide erosion in low Earth orbit space environment

    TAGAWA Masahito, YOKOTA Kumiko

    Joint work, VSP, 2005, English

    Scholarly book

Presentations

  • 惑星高層大気環境模擬のための複合分子線システムの構築とロングノズルの効果について

    大倉僚太, 藤本友介, 清水鉄平, 岩田稔, 木本雄吾, 横田久美子, 田川雅人

    第55日本航空宇宙学会中部・関西支部合同秋季大会, 24 Nov. 2018

  • 大気吸入型イオンエンジン放電室内におけるECRプラズマ生成過程の粒子法による数値解析

    白川遼, 臼井英之, 三宅洋平, 田川雅人, 西山和孝

    第55日本航空宇宙学会中部・関西支部合同秋季大会, 24 Nov. 2018

  • 超低軌道宇宙環境における高分子材料の劣化原因対する考察とSLATSデータとの比較検討

    藤本友介, 井出航, 大倉僚太, 岩田稔, 土屋佑太, 後藤亜希, 行松和輝, 木本雄吾, 横田久美子, 田川雅人

    第55日本航空宇宙学会中部・関西支部合同秋季大会, 24 Nov. 2018

  • 大気吸入型イオンエンジンにおけるECRプラズマ粒子シミュレーション

    白川遼, 臼井英之, 三宅洋平, 田川雅人, 西山和孝

    2018年日本表面真空学会学術講演会, 19 Nov. 2018

  • 超低軌道宇宙環境での高分子材料の耐性評価とSLATSデータとの比較検討について

    藤本友介, 井出航, 大倉僚太, 岩田稔, 土屋佑太, 後藤亜希, 行松和輝, 木本雄吾, 横田久美子, 田川雅人

    2018年日本表面真空学会学術講演会, 19 Nov. 2018

  • 惑星高層大気シミュレーションのための複合分子線システムの構築とロングノズルの効果

    大倉僚太, 藤本友介, 清水鉄平, 岩田稔, 木本雄吾, 横田久美子, 田川雅人

    2018年日本表面真空学会学術講演会, 19 Nov. 2018

  • 超熱原子ビームによる固体表面の濡れ性制御

    田川雅人, 横田久美子

    第39回日本熱物性シンポジウム, 11 Nov. 2018

  • 超低軌道宇宙環境模擬のためのワンノズルツービームレーザーデトネーション原子状酸素ビーム装置

    横田久美子, 大倉僚太, 藤本友介, 岩田稔, 田川雅人

    第39回日本熱物性シンポジウム, 11 Nov. 2018

  • 大気吸入型イオンエンジン放電室内におけるECRプラズマ生成シミュレーション

    白川遼, 臼井英之, 三宅洋平, 田川雅人, 西山和孝

    第15回宇宙環境シンポジウム, 30 Oct. 2018, 仙台

  • ISS材料劣化実験における原子状酸素フルーエンス計測法に関する一考察

    田川雅人藤本友介, 大倉僚太, 白川遼, 井出航, 横田久美子, Kim K. de Groh, Bruce A. Banks

    第15回宇宙環境シンポジウム, 30 Oct. 2018, 仙台

  • “宇宙材料劣化研究拠点の活動“

    岩田稔, 田川雅人, 太刀川純孝

    第62回宇宙科学技術連合講演会, 24 Oct. 2018, 久留米市

  • “惑星高層大気環境模擬のための複合分子線システムの構築とロングノズルの効果“

    大倉僚太, 藤本友介, 清水鉄平, 岩田稔, 木本雄吾, 横田久美子, 田川雅人

    第62回宇宙科学技術連合講演会, 24 Oct. 2018, 久留米市

  • 超低軌道宇宙環境における高分子材料の劣化特性とSLATSデータとの比較検討

    藤本友介, 井出航, 大倉僚太, 岩田稔, 土屋佑太, 後藤亜季, 行松和輝, 木本雄吾, 横田久美子, 田川雅人

    第62回宇宙科学技術連合講演会, 24 Oct. 2018, 久留米市

  • 大気吸入型イオンエンジン放電室内におけるECRプラズマ生成シミュレーション

    白川遼, 臼井英之, 三宅洋平, 田川雅人, 西山和孝

    第62回宇宙科学技術連合講演会, 24 Oct. 2018, 超低軌道宇宙環境における高分子材料の劣化特性とSLATSデータとの比較検討

  • 宇宙用材料を指向した液晶ポリマーへの原子状酸素照射

    小柴康子, 横田久美子, 西本卓馬, 堀家匠平, 福島達也, 田川雅人, 石田謙司

    第79回応用物理学会秋季学術講演会, 18 Sep. 2018, 名古屋市

  • 原子状酸素ビーム照射試験における残留未解離酸素分子の影響

    横田久美子, 北 一貴, 藤本友介, 大倉僚太, 田川雅人

    第79回応用物理学会秋季学術講演会, 18 Sep. 2018, 名古屋市

  • 超低軌道環境における中性ガス衝突誘起材料劣化現象メカニズムの解析

    横田久美子, 田川雅人

    第4回超低高度衛星の利用に向けたワークショップ, 18 Sep. 2018, 東京

  • 空気吸込式イオンエンシ?ンの実証に向けたエアインテーク数値解析

    小澤宇志, 今村俊介, 西山和孝, 田川雅人, 藤田和央

    第50回流体力学講演会, 04 Jul. 2018, 宮崎

  • 超低軌道環境における中性ガス衝突誘起材料劣化現象メカニズムの解析

    横田久美子, 田川雅人

    SLATS報告会, 26 Mar. 2018

  • 薄型ピエゾバルブを用いたワンノズルツービム超熱原子線システム

    横田久美子, 清水鉄兵, 大倉僚太, 藤本友介, 北一貴, 徐世傑, 岩田稔, 田川雅人

    第65回応用物理学会春季学術講演会, 17 Mar. 2018

  • 研究紹介 ?神戸大学における宇宙環境工学研究2

    大倉僚太, 横田久美子, 田川雅人

    ライト祭, 02 Dec. 2017

  • 研究紹介 ?神戸大学における宇宙環境工学研究1

    藤本友介, 横田久美子, 田川雅人

    ライト祭, 02 Dec. 2017

  • 超低軌道宇宙環境におけるFEP/Agの劣化メカニズムについて

    藤本友介, 北一貴, 大倉僚太, 岩田稔, 横田久美子, 田川雅人

    第54回日本航空宇宙学会関西中部支部合同講演会, 11 Nov. 2017

  • 惑星高層大気環境模擬のための複合分子・原子線実験装置の開発

    大倉僚太, 藤本友介, 北一貴, 岩田稔, Chee Sze Keat, 木本雄吾, 横田久美子, 田川雅人

    第54回日本航空宇宙学会関西中部支部合同講演会, 11 Nov. 2017

  • 低軌道環境におけるFEP/Ag熱制御材劣化について

    横田久美子, 大倉僚太, 藤本友介, 北一貴, 田川雅人

    第38回日本熱物性シンポジウム, 07 Nov. 2017

  • 惑星高層大気シミュレーションのための複合分子線システムの構築と評価

    大倉僚太, 藤本友介, 北一貴, 岩田稔, 徐世傑, 木本雄吾, 横田久美子, 田川雅人

    第60回宇宙科学技術連合講演会, 25 Oct. 2017

  • 模擬超低軌道宇宙環境におけるFEP/Agフィルムの劣化評価について

    藤本友介, 北一貴, 大倉僚太, 岩田稔, 横田久美子, 田川雅人

    第60回宇宙科学技術連合講演会, 25 Oct. 2017

  • 宇宙機用熱制御材料における宇宙環境地上模擬研究に関する近年の話題

    横田久美子, 田川雅人

    日本航空宇宙学会関西支部 第463回航空懇談会, 29 Sep. 2017

  • 低軌道宇宙環境耐性をもつ木質炭素化膜の微細構造解析

    畑俊充, 梶本武志, 田川雅人, 小嶋浩嗣

    第15回木質炭化学会研究発表会, 01 Jun. 2017

  • 超低軌道宇宙環境におけるFEP/Agフィルムの劣化原因に対する考察

    藤本友介, 北一貴, 大倉僚太, 岩田稔, 横田久美子, 田川雅人

    第14回宇宙環境シンポジウム, Jun. 2017

  • 惑星高層大気環境模擬のための複合分子線実験装置の構築と評価について

    大倉僚太, 藤本友介, 北一貴, 岩田稔, Chee Sze Keat, 木本雄吾, 横田久美子, 田川雅人

    第14回宇宙環境シンポジウム, Jun. 2017

  • 軟X線照射によるフッ素含有DLC膜の膜物性変化

    高松大樹, 神田一浩, 三浦永理, 赤坂大樹, 雑賀章浩, 玉田耕治, 田川雅人, 横田久美子, 古山雄一

    第78回応用物理学会春季学術講演会, 14 Mar. 2017

  • レーザー駆動混合ガスプラズマからの極端紫外線放射スペクトル ―混合割合によるスペクトル変化―

    田川雅人, 大平淳貴, 木本雄吾, 西村博明, 横田久美子

    第78回応用物理学会春季学術講演会, 14 Mar. 2017

  • 宇宙環境地上試験におけるEUV放射強度の低減

    横田久美子, 大平淳貴, 大藪高詩, 木本雄吾, 西村博明, 田川雅人

    第78回応用物理学会春季学術講演会, 14 Mar. 2017

  • 大気吸入イオンエンジンの現状と課題

    安河内 翼, 田川雅人, 横田久美子, 三宅洋平, 臼井英之, 西山和孝

    第57回航空原動機・宇宙推進講演会, 09 Mar. 2017

  • 宇宙環境誘起材料劣化に関する最近の話題:劣化原因と複合効果の理解は正しかったのか

    田川雅人

    第330回生存圏シンポジウムプログラム, 10 Jan. 2017

  • プラズマシミュレーション援用による大気吸入型イオンエンジンの実験的研究

    安河内翼, 臼井英之, 三宅洋平, 福田雅人, 横田久美子, 田川雅人

    第332回生存圏シンポジウム, 02 Dec. 2016

  • 宇宙材料劣化研究拠点による学術研究の活性化と高度な衛星プロジェクト支援

    岩田稔, 田川雅人, 太刀川純孝, 平尾敏雄, 大津志保

    第37回日本熱物性シンポジウム, 28 Nov. 2016

  • 火星高層大気環境シミュレーションを目指した超熱混合分子ビーム形成の試み

    横田久美子, 初田光嶺, 田川雅人

    第37回日本熱物性シンポジウム, 28 Nov. 2016

  • 変位拡大機構を用いた高速超音速分子線バルブ

    横田久美子, 徐世傑, 田川雅人

    第77回応用物理学会秋季学術講演会, 13 Sep. 2016

  • 宇宙材料劣化研究拠点の形成と衛星プロジェクト支援(II)

    岩田稔, 田川雅人, 太刀川純孝, 平尾敏雄, 大津志保

    第60回宇宙科学技術連合講演会, 06 Sep. 2016

  • 固体粒子加速器への高出力レーザー応用

    守本郁, 弘中陽一郎, 重森啓介, 佐野孝好, 田川雅人, 北澤幸人, 阿藤敏行

    第60回宇宙科学技術連合講演会, 06 Sep. 2016

  • 放電室内電界分布の計算結果を考慮した大気吸入型イオンエンジンの実験的研究

    安河内翼, 臼井英之, 三宅洋平, 福田雅人, 横田久美子, 田川雅人

    第60回宇宙科学技術連合講演会, 06 Sep. 2016

  • 超低軌道領域における大気吸入型イオンエンジンの利用と課題

    安河内翼, 臼井英之, 三宅洋平, 福田雅人, 横田久美子, 田川雅人

    第60回宇宙科学技術連合講演会, 06 Sep. 2016

  • 原子状酸素誘起材料劣化地上試験に関わる複合効果について

    田川雅人, 横田久美子

    第60回宇宙科学技術連合講演会, 06 Sep. 2016

  • 不活性分子同時衝突による原子状酸素誘起材料劣化の加速効果

    北一貴, 山崎勇希, 横田久美子, 田川雅人

    第60回宇宙科学技術連合講演会, 06 Sep. 2016

  • Development of solid particle accelerator usig GXII laser system

    Yoichiro Hironaka, Masahito Tagawa, Takayoshi Sano, Kaoru Morimoto, Keisuke Shigemori

    レーザー研シンポジウム, 19 Apr. 2016

  • Evaluation of the EUV emission from the sub-LEO space environmental simulation using carbon dioxide laser: FY2015 report

    Masahito Tagawa, Kumiko Yokota, Junki Ohira, Kaoru Morimoto, Yugo Kimoto, Hiroaki Nishimura

    レーザー研シンポジウム, 19 Apr. 2016

  • 低軌道宇宙環境耐性をもった木質系炭素膜の微細構造

    畑 俊充, 梶本武志, 田川雅人, 小嶋浩嗣

    第66回日本木材学会大会, 27 Mar. 2016

  • 超低高度宇宙環境における原子状酸素誘起材料劣化現象における窒素分子同時衝突効果の定量化

    横田久美子, 北一貴, 山?勇希, 田川雅人

    第63回応用物理学会春季学術講演会, 19 Mar. 2016

  • 高出力レーザーを用いた非破壊固体粒子加速法の開発

    守本 郁, 弘中陽一郎, 重森啓介, 佐野孝好, 田川雅人, 北澤幸人, 阿藤敏行

    第63回応用物理学会春季学術講演会, 19 Mar. 2016

  • 分子流入を考慮した大気吸入型イオンエンジンの中性粒子シミュレーション

    安河内 翼, 臼井英之, 三宅洋平, 川口伸一郎, 福田雅人, 横田久美子, 田川雅人

    第63回応用物理学会春季学術講演会, 19 Mar. 2016

  • 高出力レーザーを用いた固体粒子加速法の開発

    守本 郁, 弘中陽一郎, 重森啓介, 佐野孝好, 田川雅人, 北澤幸人, 阿藤敏行

    平成27年度衝撃波シンポジウム, 07 Mar. 2016

  • 宇宙環境工学の観点から見たSLATSへの期待

    田川雅人, 井出健太, 山崎勇希, 北一貴, 横田久美子

    第3回超低高度衛星利用に向けてのワークショップ, 29 Feb. 2016

  • スペースデブリ問題に関するトピックス -微小デブリ研究と対策-

    松本晴久, 奥平修, 神谷浩紀, 花田俊也, 東出真澄, 赤星保浩, 仁田工美, 弘中陽一郎, 田川雅人, 北澤幸人

    テクノ・シンポジウム名大, 19 Feb. 2016

  • 宇宙デブリの衝突評価技術

    北澤幸人, 弘中陽一郎, 大平淳貴, 佐野孝好, 重森啓介, 田川雅人

    平成27年度光ビームプラットフォーム報告会, 25 Jan. 2016

  • 宇宙材料劣化研究拠点の形成 〜衛星プロジェクト支援のこれまでとこれから〜

    岩田稔, 田川雅人, 太刀川純孝, 平尾敏雄, 大津志保

    第31回宇宙構造材料シンポジウム, 15 Jan. 2016

  • プラズマシミュレーションを用いたABIE放電室内における中性粒子吸入を考慮したプラズマ生成解析

    川口 伸一郎, 臼井 英之, 三宅 洋平, 安河内 翼, 福田 雅人, YOKOTA KUMIKO, TAGAWA MASAHITO

    第12回宇宙環境シンポジウム, Nov. 2015, Japanese, Kitakyushu, Domestic conference

    Oral presentation

  • プラズマシミュレーション援用による大気吸入型イオンエンジン開発に向けたプラズマ解析と実機検証

    川口 伸一郎, 臼井 英之, 三宅 洋平, 安河内 翼, YOKOTA KUMIKO, TAGAWA MASAHITO

    第58回宇宙科学技術連合講演会, Oct. 2015, Japanese, Kagoshima, Domestic conference

    Poster presentation

  • Oxidation of titanium atoms in DLC films by hyperthermal atomic oxygen beam relevance to space environmental effect in LEO

    Masahito Tagawa, Akimine Hatsuda, Daiki Watanabe, Kumiko Yokota

    16th European Conference on Application of Surface and Interface Analysis,, Sep. 2015, English, Granada, Spain., International conference

    Poster presentation

  • Energy dependence on oxidation of Si-containing polyimide by hyperthermal atomic oxygen collisions

    Kumiko Yokota, Daiki Watanabe, Akimine Hatsuda, Masahito Tagawa

    16th European Conference on Application of Surface and Interface Analysis,, Sep. 2015, English, Granada, Spain., International conference

    Poster presentation

  • Property of hyperthermal CO2 beam formed by a laser-detonation facility for space environmental effect studies in upper Martian atmosphere

    Masahito Tagawa, Akimine Hatsuda, Kumiko Yokota

    13th International Conference on Laser Ablation, Aug. 2015, English, Cairns, Australia, International conference

    Poster presentation

  • Laser-detonation facility for acceleration of gaseous materials: Etching and deposition of solid materials

    Kumiko Yokota, Kenta Ide, Junki Ohira, Yuki Yamazaki, Kaoru Morimoto, Hidetoshi Asada, Masahito Tagawa

    13th International Conference on Laser Ablation, Aug. 2015, English, Cairns, Australia, International conference

    Poster presentation

  • Three Dimensional Particle-In-Cell Simulation for the Development of Air Breathing Ion Engine

    川口 伸一郎, 臼井 英之, 三宅 洋平, 安河内 翼, 福田 雅人, YOKOTA KUMIKO, TAGAWA MASAHITO

    Joint Conference of 30th International Symposium on Space Technology and Science, 34th International Electric Propulsion Conference and 6th Nano-satellite Symposium, Jul. 2015, English, Kobe, International conference

    Poster presentation

  • Numerical Simulation of ECR Plasma in Air Breathing Ion engine (ABIE): Neutral Gas Density Distribution and ECR Plasma Formation

    Yasukochi Tsubasa, Usui Hideyuki, Miyake Yohei, Kawaguchi Shin-ichirou, Fukuda Masato, Yokota Kumiko, Tagawa Masahito

    Joint Conference of 30th International Symposium on Space Technology and Science, 34th International Electric Propulsion Conference and 6th Nano-satellite Symposium, Jul. 2015, English, Kobe, International conference

    Poster presentation

  • Laser-detonation beam facilities for sub-LEO material erosion studies

    Kumiko Yokota, Kenta Ide, Yuki Yamasaki, Akimine Hatsuda, Kaoru Morimoto, Masahito Tagawa

    13th International Symposium on Materials in the Space Environment, Jun. 2015, English, ONERA, Pau, France, International conference

    Poster presentation

  • Effect of high-energy inert gas collisions on the atomic oxygen-induced polymer erosion

    Masahito Tagawa, Kenta Ide, Yuki Yamasaki, Daiki Watanabe, Kumiko Yokota

    13th International Symposium on Materials in the Space Environment, Jun. 2015, English, ONERA, Pau, France, International conference

    Oral presentation

  • Collision-induced oxidation of Si atoms embedded in carbon-based material

    Masahito Tagawa, Daiki Watanabe, Yuichi Furuyama, Kazuhiro Kanda, Akitaka Yoshigoe, Yuden Teraoka, Koji Matsumoto, Kumiko Yokota

    13th International Symposium on Materials in the Space Environment, Jun. 2015, English, ONERA, Pau, France, International conference

    Poster presentation

  • 超低軌道宇宙環境模擬のためのレーザーデトネーションビーム装置

    Yokota Kumiko, Ide Kenta, Ohira Junki, Watanabe Daiki, Yamasaki Yuki, Hatsuda Akimine, Morimoto Iku, Tagawa Masahito

    応用物理学会 第62回応用物理学会春季学術講演会, Mar. 2015, Japanese, 平塚市, Domestic conference

    Oral presentation

  • Si-ドープ木質系DLC被膜による低軌道宇宙環境耐性の向上

    Hata Toshimitsu, Tagawa Masahito, Kojima Hirotsugu, Kajimoto Takeshi

    京都大学生存圏研究所 第275回生存圏ミッションシンポジウム, Feb. 2015, Japanese, 宇治市, Domestic conference

    Oral presentation

  • 原子状酸素照射によるカーボンナノチューブ電界放出カソードへの影響と対策評価

    Shimada Atsuko, Imoto Shin, Yuasa Naoki, Ohkawa Yasushi, Matsumoto Koji, Tagawa Masahito, Yamagiwa Yoshiki

    宇宙航空研究開発機構 平成26年度宇宙輸送シンポジウム, Jan. 2015, Japanese, 相模原市, Domestic conference

    Oral presentation

  • Si含有水素化DLC膜への原子状酸素照射の影響

    Kidena Kengo, Niibe Masahito, Yokota Kumiko, Tagawa Masahito, Furuyama Yuichi, Komatsu Keiji, Saito Hidetishi, Kanda Koichi

    日本放射光学会 第28回日本放射光学会年会 放射光科学合同シンポジウム, Jan. 2015, Japanese, 草津市, Domestic conference

    Oral presentation

  • 研究紹介 -宇宙環境工学-

    Tagawa Masahito

    日本航空宇宙学会 2014ライト祭, Dec. 2014, Japanese, 大阪市, Domestic conference

    Oral presentation

  • Si, Ti添加ダイヤモンドライクカーボン膜表面酸化反応における原子状酸素衝突エネルギーの影響

    Watanabe Daiki, Hatsuda Akimine, Furuyama Yuichi, Kanda Kazuhiro, Yoshigoe Akitaka, Teraoka Yuden, Yokota Kumiko, Tagawa Masahito

    宇宙航空研究開発機構 第11回宇宙環境シンポジウム, Dec. 2014, Japanese, 大阪市, Domestic conference

    Oral presentation

  • 3次元PICシミュレーションを用いた大気吸入型イオンエンジン放電室内部におけるプラズマ生成解析

    KAWAGUCHI Shinichiro, USUI Hideyuki, MIYAKE Yohei, YASUKOCHI Tsubasa, FUKUDA Masato, YOKOTA Kumiko, TAGAWA Masato

    第11回宇宙環境シンポジウム, Dec. 2014, Japanese, Osaka, Domestic conference

    Oral presentation

  • 低軌道宇宙環境地上模擬試験の高度化について

    Tagawa Masahito, Yokota Kumiko

    日本航空宇宙学会 第58回宇宙科学技術連合講演会, Nov. 2014, Japanese, 長崎市, Domestic conference

    Oral presentation

  • 超低地球軌道環境シミュレーションのためのAr・O2混合プラズマの分光評価

    Ohira Junki, Yokota Kumiko, Tagawa Masahito

    日本真空学会 第55回真空に関する連合講演会, Nov. 2014, Japanese, 大阪市, Domestic conference

    Oral presentation

  • 超低高度大気環境による材料劣化現象について

    Yokota Kumiko, Yamasaki Yuki, Hatsuda Akimine, Ide Kenta, Watanabe Daiki, Tagawa Masahito

    日本航空宇宙学会 第58回宇宙科学技術連合講演会, Nov. 2014, Japanese, 長崎市, Domestic conference

    Oral presentation

  • 火星高層大気と宇宙機との相互作用に関する研究(1) レーザーデトネーション法による超熱二酸化炭素ビーム形成

    Hatsuda Akimine, Yokota Kumiko, Tagawa Masahito

    日本航空宇宙学会 第58回宇宙科学技術連合講演会, Nov. 2014, Japanese, 長崎市, Domestic conference

    Oral presentation

  • 衛星搭載用水晶振動子を用いた非回収軌道上材料曝露試験と地上キャリブレーション

    Yokota Kumiko, Ide Kenta, Yamasaki Yuki, Nishiyama Kazutaka, Tagawa Masahito

    日本熱物性学会 第35回日本熱物性シンポジウム, Nov. 2014, Japanese, 東京都, Domestic conference

    Oral presentation

  • 宇宙機搭載用QCMを用いた宇宙環境誘起材料劣化に関する地上対照試験法

    Yamasaki Yuki, Ide Kenta, Nishiyama Kazutaka, Yokota Kumiko, Tagawa Masahito

    日本航空宇宙学会 第58回宇宙科学技術連合講演会, Nov. 2014, Japanese, 長崎市, Domestic conference

    Oral presentation

  • カーボンナノチューブ電界放出カソードにおける原子状酸素対策の有効性評価

    Shimada Atsuko, Imoto Shin, Ohkawa Yasushi, Matsumoto Koji, Tagawa Masahito, Yamagiwa Yoshiki

    日本航空宇宙学会 第58回宇宙科学技術連合講演会, Nov. 2014, Japanese, 長崎市, Domestic conference

    Oral presentation

  • Si, Ti添加DLC膜表面酸化反応における原子状酸素衝突エネルギーの影響

    Watanabe Daiki, Yokota Kumiko, Tagawa Masahito

    日本真空学会 第55回真空に関する連合講演会, Nov. 2014, Japanese, 大阪市, Domestic conference

    Oral presentation

  • 3次元プラズマシミュレーションをもちいた大気吸入型イオンエンジン開発のためのECRプラズマ生成解析

    KAWAGUCHI Shinichiro, USUI Hideyuki, MIYAKE Yohei, YOKOTA Kumiko, TAGAWA Masato, YASUKOCHI Tsubasa

    第58回宇宙科学技術連合講演会, Nov. 2014, Japanese, Nagasaki, Domestic conference

    Oral presentation

  • Use of space-qualified quartz crystal microbalance for non-retrieval material tests in space

    Ide Kenta, Yamasaki Yuki, Nishiyama Kazutaka, Tagawa Masahito, Yokota Kumiko

    The 7th Vacuum and Surface Sciences Conference of Asia and Australia, Oct. 2014, English, Hsinchu,Taiwan, International conference

    Oral presentation

  • surface interactions in a complicated space environment for future spacecraft development

    Yokota Kumiko, Tagawa Masahito

    The 7th Vacuum and Surface Sciences Conference of Asia and Australia, Oct. 2014, English, Hsinchu,Taiwan, International conference

    Oral presentation

  • Hyperthermal collision of O-atom on metal-doped diamond-like carbon films: effect of collision energy on the formation of protective oxide films

    Watanabe Daiki, Hatsuda Akimine, Furuyama Yuichi, Kanda Kazuhiro, Yoshigoe Akitaka, Teraoka Yuden, Yokota Kumiko, Tagawa Masahito

    The 7th Vacuum and Surface Sciences Conference of Asia and Australia, Oct. 2014, English, Hsinchu,Taiwan, International conference

    Oral presentation

  • Extreme ultraviolet emission from a laser-driven mixed gas plasma relevance to sub-low Earth orbit space environmental effect studies

    Ohira Junki, Oyabu Takashi, Kimoto Yugo, Nishimura Hiroaki, Yokota Kumiko, Tagawa Masahito

    The 7th Vacuum and Surface Sciences Conference of Asia and Australia, Oct. 2014, English, Hsinchu,Taiwan, International conference

    Oral presentation

  • 高出力レーザーによる固体粒子加速

    Hironaka Yoichiro, Ohira Junki, Sano Takayoshi, Shigemori Keisuke, Tagawa Masahito, Kitazawa Yukihito

    応用物理学会 第75回応用物理学会秋季学術講演会, Sep. 2014, Japanese, 札幌市, Domestic conference

    Oral presentation

  • 火星高層大気シミュレーションのための超熱二酸化炭素ビーム形成

    Hatsuda Akimine, Yokota Kumiko, Tagawa Masahito

    応用物理学会 第75回応用物理学会秋季学術講演会, Sep. 2014, Japanese, 札幌市, Domestic conference

    Oral presentation

  • 宇宙材料分野でのビーム表面反応研究の必要性

    Tagawa Masahito

    応用物理学会 第75回応用物理学会秋季学術講演会, Sep. 2014, Japanese, 札幌市, Domestic conference

    Oral presentation

  • 宇宙機搭載用水晶振動子微小天秤による軌道上材料劣化評価と地上キャリブレーション

    Yokota Kumiko, Ushioda Yosuke, Ide Kenta, Yamasaki Yuki, Nishiyama Kazutaka, Tagawa Masahito

    応用物理学会 第75回応用物理学会秋季学術講演会, Sep. 2014, Japanese, 札幌市, Domestic conference

    Oral presentation

  • Si含有DLC膜の原子状酸素照射効果

    Kidena Kengo, Niibe Masahito, Yokota Kumiko, Tagawa Masahito, Furuyama Yuichi, Komatsu Keiji, Saito Hidetoshi, Kanda Kazuhiro

    応用物理学会 第75回応用物理学会秋季学術講演会, Sep. 2014, Japanese, 札幌市, Domestic conference

    Oral presentation

  • Protection of materials from O-atom collision in low Earth orbit using thin oxide film grown in space

    Yokota Kumiko, Yoshigoe Akitaka, Teraoka Yuden, Kanda Kazuhiro, Furuyama Yuichi, Matsumoto Koji, Tagawa Masahito

    13th European Vacuum Conference, Sep. 2014, English, Aveiro,Portugal, International conference

    Poster presentation

  • Formation of ultra-thin oxide film at Si(001) by well-characterized hyperthermal broad oxygen atom beam exposed at room temperature

    Tagawa Masahito, Yokota Kumiko, Yoshigoe Akitaka, Teraoka Yuden

    13th European Vacuum Conference, Sep. 2014, English, Aveiro,Portugal, International conference

    Poster presentation

  • Reduction of extreme ultraviolet emission from laser-induced oxygen plasma for atom-surface interaction studies in a simulated space environment

    Tagawa Masahito, Ohira Junki, Kimoto Yugo, Nishimura Hiroaki, Yokota Kumiko

    30th European Conference on Surface Science, Aug. 2014, English, Antalya,Turkey, International conference

    Poster presentation

  • Ground-based neutral gas environment simulation related to material degradation phenomena in the orbital altitudes of 200-500 km

    Tagawa Masahito, Oyabu Takashi, Ohira Junki, Watanabe Daiki, Yamasaki Yuki, Yokota Kumiko

    COSPAR Scientific Assembly, Aug. 2014, English, Moscow,Russia, International conference

    [Invited]

    Invited oral presentation

  • Formation of protective oxide film with self-healing capability on metal-doped diamond-like carbon films using hyperthermal O-atom collision in LEO space environment

    Yokota Kumiko, Yamazaki Yuki, Hatsuda Akimine, Watanabe Daiki, Tagawa Masahito

    30th European Conference on Surface Science, Aug. 2014, English, Antalya,Turkey, International conference

    Poster presentation

  • Extreme ultraviolet emission from laser-induced plasma relevance to neutral gas environment simulation in LEO

    Tagawa Masahito, Ohira Junki, Watanabe Daiki, Kimoto Yugo, Nishimura Hiroaki, Yokota Kumiko

    COSPAR Scientific Assembly, Aug. 2014, English, Moscow,Russia, International conference

    Oral presentation

  • Atomic oxygen beam irradiation effect on the Si-doped hydrogenated DLC film

    Kidena Kengo, Endo Minami, Takamatsu Hiroki, Imai Ryo, Niibe Masahito, Yokota Kumiko, Tagawa Masahito, Kanda Kazuhiro

    International Union of Materials Research Societies, Aug. 2014, English, Fukuoka,Japan, International conference

    Oral presentation

  • Atomic oxygen beam irradiation effect on the Si-doped DLC film

    Kidena Kengo, Endo Minami, Imai Ryo, Niibe Masahito, Yokota Kumiko, Tagawa Masahito, Kanda Kazuhiro

    The 15th IUMRS-International Conference in Asia, Aug. 2014, English, Fukuoka,Japan, International conference

    Oral presentation

  • Wood-based, diamond-like carbon for improved resistance against atomic oxygen

    Kajimoto Takeshi, Hata Toshimitsu, Tagawa Masahito, Kojima Hirotsugu, Hayakawa Hajime

    11th International Conference on Protection of Materials and Structures from Space Environment, May 2014, English, Lijiang,China, International conference

    Oral presentation

  • 低軌道宇宙環境模擬用レーザーデトネーション型原子状酸素発生装置から発生する極端紫外線の評価とその応用に関する研究

    Tagawa Masahito, Yokota Kumiko, Ohira Junki, Kimoto Yugo, Nishimura Hiroaki

    大阪大学レーザー研シンポジウム2014, Apr. 2014, Japanese, 吹田市, Domestic conference

    Oral presentation

  • 導電性木質炭素化物の低軌道宇宙環境耐性向上に関する研究

    Masahito Tagawa, Tishimitsu Hata, Hirotsugu Kojima, Takeshi Kajimoto

    生存圏ミッションシンポジウム, Mar. 2014, Japanese, 京都大学, Uji, abbreviated, Domestic conference

    Oral presentation

  • レーザー誘起超音速混合原子ビーム法を用いた酸素原子の電子衝撃イオン化確率測定

    Kumiko Yokota, Takashi Oyabu, Shigeru Yasuda, Masahito Tagawa

    第60回応用物理学会春季学術講演会, Mar. 2014, Japanese, JSAP, Yokohama, abbreviated, Domestic conference

    Oral presentation

  • 9eV窒素・アルゴン分子衝突によるフッ素系高分子材料劣化現象―地上実験結果と宇宙実験データの比較―

    Masahito Tagawa, Shinji Fujimoto, Shigeru Yasuda, Kumiko Yokota

    第60回応用物理学会春季学術講演会, Mar. 2014, Japanese, JSAP, Yokohama, abbreviated, Domestic conference

    Oral presentation

  • 衝突誘起酸化反応におけるSi酸化プロセスのエネルギー依存性

    Masahito Tagawa, Kumiko Yokota, Akitaka Yoshigoe, Yuden Teraoka

    JAXA研究開発本部宇宙材料勉強会, Jan. 2014, Japanese, JAXA, Tsukuba, abbreviated, Domestic conference

    Public discourse

  • 非回収軌道上試験を目指した国産宇宙用QCMの特性と地上キャリブレーション法

    Kenta Ide, Yuki Yamazaki, Yosuke Ushioda, Kazutaka Nishiyma, Kumiko Yokota, MasahitoTagawa

    第10回宇宙環境シンポジウム, Dec. 2013, Japanese, JAXA, Tokyo, abbreviated, Domestic conference

    Oral presentation

  • 大気吸入型イオンエンジン放電室内におけるプラズマ生成シミュレーション

    Takahito Motoyama, Hideyuki Usui, Yohei Miyake, Shinichiro Kawaguchi, Kumiko Yokota, Masahito Tagawa

    第10回宇宙環境シンポジウム, Dec. 2013, Japanese, JAXA, Tokyo, abbreviated, Domestic conference

    Oral presentation

  • 低軌道宇宙環境におけるOSR用Ag/FEP劣化に対する窒素分子衝突の影響

    Kumiko Yokota, Daiki Watanabe, Masahito Tagawa

    第34回日本熱物性シンポジウム,, Nov. 2013, Japanese, JSTP, Toyama, abbreviated, Domestic conference

    Oral presentation

  • Ti含有DLC膜の原子状酸素照射への耐性評価

    Kengo Kidena, Minami Endo, Ryo Imai, Masahito Niibe, Kumiko Yokota, Masahito Tagawa, Yuichi Furuyama, Keishi Kobayashi, Hidetoshi Saito, Kazuhiro Kanda

    NewSUBARU・立命館SRセンター合同シンポジウム2013, Nov. 2013, Japanese, 兵庫県立大学, Kyoto, abbreviated, Domestic conference

    Oral presentation

  • A Synchrotron Radiation Photoelectron Spectroscopic Study on the Oxidation Reaction of Si by O-atom with Collision Energies between 2 to 9 eV

    Kumiko Yokota, Masahito Tagawa, Akitaka Yoshigoe, Yuden Teraoka

    PSA-13, Nov. 2013, English, PSA, Okinawa, abbreviated, International conference

    Poster presentation

  • 超低軌道環境を模擬するための中性アルゴンガスのフラックス測定

    Masahito Tagawa, Daiki Watanabe, Kumiko Yokota

    第57回宇宙科学技術連合講演会, Oct. 2013, Japanese, JSASS, Yonago, abbreviated, Domestic conference

    Oral presentation

  • 原子状酸素照射によるカーボンナノチューブ電界放出カソードへの影響評価

    Atsuko Shimada, Yoshinobu Tanaka, Yasushi Ohkawa, Koji Matsumoto, Masahito Tagawa, Shin Matsui, Yoshiki Yamagiwa

    第57回宇宙科学技術連合講演会, Oct. 2013, Japanese, JSASS, Yonago, abbreviated, Domestic conference

    Oral presentation

  • 原子状酸素及びアルゴン混合ビームによるSLATS/MDM地上対照加速試験

    Daiki Watanabe, Takashi Oyabu, Kumiko Yokota, Masahito Tagawa

    第57回宇宙科学技術連合講演会, Oct. 2013, Japanese, JSASS, Yonago, abbreviated, Domestic conference

    Oral presentation

  • 地上実験装置を用いた宇宙環境シミュレーションとトライボマテリアル影響評価

    Masahito Tagawa, Kumiko Yokota

    トライボロジー懇談会, Sep. 2013, Japanese, トライボロジー学会, Nagoya, abbreviated, Domestic conference

    [Invited]

    Invited oral presentation

  • 原子状酸素照射によるTi含有DLC膜の表面構造変化

    Kengo Kidena, Minami Endo, Ryo Imai, Masahito Niibe, Kumiko Yokota, Masahito Tagawa, Yuichi Furuyama, Kazuhiro Kanada

    第74回応用物理学会秋季学術講演会, Sep. 2013, Japanese, JSAP, Kyoto, abbreviated, Domestic conference

    Oral presentation

  • 原子状酸素照射によるSi含有DLC膜への影響

    Minami Endo, Kengo Kidena, Ryo Imai, Msahito Niibe, Kumiko Yokota, Masahito Tagawa, Yuichi Furuyama, Kazuhiro Kanda

    第74回応用物理学会秋季学術講演会, Sep. 2013, Japanese, JSAP, Kyoto, abbreviated, Domestic conference

    Oral presentation

  • 巨大フレアにより発生する軟X線の産業素材・生物に対する影響

    Ryo Imai, Masahito Niibe, Kazuhiro Kanda, Masahito Tagawa, Norimasa Kobayashi

    第6回兵庫県立大学シンポジウム, Sep. 2013, Japanese, 兵庫県立大学, Kobe, abbreviated, Domestic conference

    Oral presentation

  • レーザー駆動酸素プラズマからの極端紫外線分光の試み

    Masahito Tagawa, Kumiko Yokota, Hiroyuki Shimamura, Yugo Kimoto, Mayuko Koga, Hiroaki Nishimura

    第74回応用物理学会秋季学術講演会,, Sep. 2013, Japanese, JSAP, Kyoto, abbreviated, Domestic conference

    Oral presentation

  • レーザー駆動混合ガスプラズマからの極端紫外線放射スペクトル

    Junki Ohira, Takashi Oyabu, Yugo Kimoto, Hiroaki Nishimura, Kumiko Yokota, Masahito Tagawa

    第74回応用物理学会秋季学術講演会, Sep. 2013, Japanese, JSAP, Kyoto, abbreviated, Domestic conference

    Oral presentation

  • Use of laser-induced plasmas for gas-surface interaction studies on Earth observation satellites

    Masahito Tagawa, Kumiko Yokota

    International Conference on Research and Applications of Plasmas, Sep. 2013, English, Warsow/Poland, abbreviated, International conference

    Poster presentation

  • Influence of 9 eV collision of chemically inert molecules on fluorinated polymer erosion in sub-low earth orbit

    Kumiko Yokota, Masahito Tagawa, Koji Matsumoto, Yuichi Furuyama, Akira Kitamura, Kazuhiro Kanda, Mayumi Tode, Akitaka Yoshigoe, Yuden Teraoka

    19th International Vacuum Congress,, Sep. 2013, English, EVS, Paris/France, abbreviated, International conference

    Poster presentation

  • Influence of 5 eV collision of O-atoms on material erosions in low earth orbit space environment

    Masahito Tagawa, Kumiko Yokota

    19th International Vacuum Congress,, Sep. 2013, English, EVS, Paris/France, abbreviated, International conference

    Poster presentation

  • An attempt to form multiple-composition hyperthermal atomic beams by a laser- induced plasma for planetary environmental studies

    Kumiko Yokota, Daiki Watanabe, Junki Ohira, Takashi Oyabu, Masahito Tagawa

    International Conference on Research and Applications of Plasmas, Sep. 2013, English, Warsow/Poland, abbreviated, International conference

    Poster presentation

  • Microwave Plasma Simulation for the Development of Air Breathing Ion Engine

    Takahito Motoyama, Hideyuki Usui, Yohei Miyake, Akihiko Hashimoto, Masahito Tagawa, Kumiko Yokota

    The 11th International School Symposium for Space Simulations, Aug. 2013, English, abbreviated, International conference

    Oral presentation

  • 宇宙環境下における衛星材料劣化現象

    Masahito Tagawa

    放射線トピックス講演会, Jul. 2013, Japanese, 岡山理科大学, abbreviated, Domestic conference

    Public discourse

  • Synergistic effect of atomic oxygen and vacuum ultraviolet on polymeric materials at various temperatures

    Yosuke Ushioda, Takaho Tsuboi, Kenta Ide, Masahito Tagawa, Kumiko Yokota, Akio Okamoto

    The 29th International Space Technology and Sciences, Jun. 2013, English, JSASS, Nagoya, abbreviated, International conference

    Oral presentation

  • Sub-low Earth orbit neutral gas environment simulation using laser detonation beam source

    Takashi Ohyabu, Shigeru Yasuda, Masahito Tagawa, Kumiko Yokota

    The 29th International Space Technology and Sciences, Jun. 2013, English, JSASS, Nagoya, abbreviated, International conference

    Oral presentation

  • Microwave plasma simulation for the development of air breathing ion engine

    Takahito Motoyama, Hideyuki Usui, Yohei Miyake, Kumiko Yokota, Masahito Tagawa

    The 29th International Space Technology and Sciences, Jun. 2013, English, JSASS, Nagoya, abbreviated, International conference

    Oral presentation

  • Impact of high-energy collision of inert gas on the material degradation in space environment -Erosion properties in the hyperthermal multiple composition beams-

    Masahito Tagawa, Takashi Ohyabu, Shigeru Yasuda, Kumiko Yokota, Akio Okamoto

    The 29th International Space Technology and Sciences, Jun. 2013, English, JSASS, Nagoya, abbreviated, International conference

    Oral presentation

  • Impact of high-energy collision of inert gas on the material degradation in space environment -Comparison of the ground-based data and MISSE-2 analysis-,

    Kumiko Yokota, Takashi Ohyabu, Shigeru Yasuda, Masahito Tagawa

    The 29th International Space Technology and Sciences, Jun. 2013, English, JSASS, Nagoya, abbreviated, International conference

    Oral presentation

  • A ground-based simulation study for FEP erosion on the SLATS MDM mission

    Shinji Fujimoto, Shigeru Yasuda, Daiki Watanabe, Kumiko Yokota, Masahito Tagawa, Yugo Kimoto, Junichiro Ishizawa

    The 29th International Space Technology and Sciences, Jun. 2013, English, JSASS, Nagoya, abbreviated, International conference

    Oral presentation

  • 低軌道宇宙環境模擬用レーザーデトネーション型原子状酸素発生装置から発生する極端紫外線の評価とその応用に関する研究

    Masahito Tagawa, Kumiko Yokota, Yugo Kimoto, Mayuko Koga, Hiroaki Nishimura

    レーザー研シンポジウム2013, May 2013, Japanese, ILE, Osaka University, Suita, abbreviated, Domestic conference

    Oral presentation

  • 低軌道宇宙環境における高分子劣化現象とその評価

    Masahito Tagawa, Kumiko Yokota

    第62回高分子年次大会, May 2013, Japanese, 日本高分子学会, Kyoto, abbreviated, Domestic conference

    [Invited]

    Invited oral presentation

  • 宇宙環境地上シミュレーション分野における高出力レーザーの利用と期待

    Masahito Tagawa, Kumiko Yokota

    レーザー研シンポジウム2013, May 2013, Japanese, ILE, Osaka University, Suita, abbreviated, Domestic conference

    Invited oral presentation

  • Hyperthermal atomic oxygen beam irradiation effect on the Ti-containing DLC film

    Kazuhiro Kanda, Kazuhiro Fukuda, Ryo Imai, Masahito Niibe, Sinya Fujimoto, Kumiko Yokota, Masahito Tagawa

    New Diamond and Nanocarbon Conference, 2013, English, Singapole, abbreviated, International conference

    Poster presentation

  • 原子状酸素照射による木質炭素化物の構造変化の解明

    Takeshi Kajimoto, Toshimitu Hata, Masahito Tagawa, Hirotsugu Kojima

    第37回炭素材料学会, Dec. 2010, Japanese, 炭素学会, 姫路, Domestic conference

    Oral presentation

  • ATOX-related researches at Kobe University

    Masahito Tagawa

    ESTEC QEM Seminar, Nov. 2010, English, European Space Agency, Noordwijk, International conference

    [Invited]

    Invited oral presentation

  • フッ素系高分子の原子状酸素誘起エロージョンにおける非線形エネルギー依存性

    Masahito Tagawa, Kazuhiro Kishida, Kumiko Yokota, Akira Okamoato

    第7回宇宙環境シンポジウム, Oct. 2010, Japanese, 宇宙航空研究機構, 東京, Domestic conference

    Oral presentation

  • 宇宙環境誘起材料劣化に及ぼす不活性分子衝突の効果

    Masahito Tagawa, Kumiko Yokota, Akira Okamoato

    第71回応用物理学会学術講演会, Sep. 2010, Japanese, 応用物理学会, 長崎, Domestic conference

    Oral presentation

  • 宇宙環境誘起材料劣化に及ぼす原子状酸素と真空紫外線の複合効果

    Kumiko Yokota, Masahito Tagawa, Akira Okamoato

    第71回応用物理学会学術講演会, Sep. 2010, Japanese, 応用物理学会, 長崎, Domestic conference

    Oral presentation

  • 宇宙環境地上試験の高度化について(2) 原子状酸素照射時にレーザープラズマから放射される極端紫外線スペクトル計測の試み

    Masahito Tagawa, Kazuhiro Kishida, Akira Mizutani, Kumiko Yokota, Hiroyuki Shimamurra, Yugo Kimoto, Mayuko Koga, Hiroaki Nishimura

    第54回宇宙科学技術連合講演会, Sep. 2010, Japanese, 日本航空宇宙学会, 静岡, Domestic conference

    Oral presentation

  • 宇宙環境地上試験の高度化について(1) 紫外線敏感材料における紫外線照射効果"

    Kumiko Yokota, Kazuhiro Kishida, Masahito Tagawa, Jun-ichiro Ishizawa

    第54回宇宙科学技術連合講演会, Sep. 2010, Japanese, 日本航空宇宙学会, 静岡, Domestic conference

    Oral presentation

  • 低軌道宇宙環境模擬用レーザーデトネーション型原子状酸素発生装置から発生する極端紫外線の評価とその応用に関する研究

    Masahito Tagawa, Kumiko Yokota, Mayuko Koga, Hiroaki Nishimura

    レーザー研シンポジウム2010, May 2010, Japanese, 大阪大学, 吹田, Domestic conference

    Oral presentation

  • 宇宙用木質材料の耐腐食性の向上

    Takeshi Kajimoto, Toshimitu Hata, Masahito Tagawa, Hirotsugu Kojima, Hajime Hayakawa, Hiroshi Yamakawa, Yoshikatu Ueda

    第8回木質炭化学会大会, May 2010, Japanese, 日本木質学会, 東京, Domestic conference

    Oral presentation

  • 軟X線照射によるDLC膜からの水素脱離過程

    kazuhiro kanda, Masahito Tagawa, Kumiko Yokota, Mayumi Tode, Yuden Teraoka, Shinji Mayumi

    先端技術セミナー2010, Mar. 2010, Japanese, 兵庫県立大学, 姫路市, Domestic conference

    Oral presentation

  • 高水素化DLC膜への真空紫外線照射効果

    Kumiko Yokota, Masahito Tagawa, Yuichi Furuyama, Mayumi Tode, Akitaka Yoshigoe, Yuden Teraoka

    第57回応用物理学関係連合講演会, Mar. 2010, Japanese, 応用物理学会, 平塚市, Domestic conference

    Oral presentation

  • 高水素化DLC膜からの水素脱離に対する表面金属酸化膜の効果

    Masahito Tagawa, Kumiko Yokota, Yuichi Furuyama, Mayumi Tode, Akitaka Yoshigoe, Yuden Teraoka

    第57回応用物理学関係連合講演会, Mar. 2010, Japanese, 応用物理学会, 平塚市, Domestic conference

    Oral presentation

  • Arのマイクロ波放電フロー中でのテトラメチルシランの分解を用いた硬質a-SiCx膜の形成(2) 局所構造解析

    Akira Wada, Takeshi Ohgaki, Masahito Niibe, Masahito Tagawa, Hidetoshi Saito, Kazuhiro Kanda, Haruhiko Ito

    第57回応用物理学関係連合講演会, Mar. 2010, Japanese, 応用物理学会, 平塚市, Domestic conference

    Oral presentation

  • Effect of Vacuum Ultraviolet Exposure and Surface Oxide Layer on the Hydrogen Desorption from Hydrogenated Diamond-like Carbon Films

    Masahito Tagawa, Kumiko Yokota, Yuichi Furuyama, Kazuhiro Kanda, Mayumi Tode, Akitaka Yoshigoe, Yuden Teraoka

    第5回JEAE放射光科学シンポジウム, Feb. 2010, English, JAEA, 佐用町, Domestic conference

    Poster presentation

  • Departure Process of Hydrogen from Highly-Hydrogenated Diamond-Like Carbon Film by Exposure to Synchrotron Radiation

    Kazuhiro Kanda, Kumiko Yokota, Masahito Tagawa, Mayumi Tode, Yuden Teraoka, Shinji Matsui

    第5回JEAE放射光科学シンポジウム, Feb. 2010, English, JAEA, 佐用町, Domestic conference

    Poster presentation

  • 軟X線照射による高水素化DLC膜の表面改質

    Kazuhiro Kanda, Kumiko Yokota, Masahito Tagawa, Shinji Matsui

    第23回放射光学会年会・合同シンポジウム, Jan. 2010, Japanese, 日本放射光学会, 姫路市, Domestic conference

    Oral presentation

  • 原子状酸素地上試験の高精度化について

    Kumiko Yokota, Kazuhiro Kishida, Masahito Tagawa

    第26回宇宙利用シンポジウム, Jan. 2010, Japanese, JAXA, 相模原市, Domestic conference

    Poster presentation

  • 衛星搭載用原子状酸素センサーのキャリブレーション法について

    Masahito Tagawa, Kazuhiro Kishida, Kumiko Yokota

    第26回宇宙利用シンポジウム, Jan. 2010, Japanese, JAXA, 相模原市, Domestic conference

    Poster presentation

  • 宇宙用木質材料への原子状酸素の照射効果

    Takeshi Kajimoto, Toshimitu hata, Masahito Tagawa, Hirotugu Kojima, Hiroshi Yamakawa, Yoshikatsu Ueda

    第2回宇宙環境利用シンポジウム(第133回生存圏シンポジウム), Dec. 2009, Japanese, 京都大学, 宇治市, Domestic conference

    Oral presentation

  • 11th Int. Symposium On Materials in a Space Environment 報告

    Masahito Tagawa, Minoru Iwata

    宇宙材料の熱物性とシステムデザイン第6回研究会, Dec. 2009, Japanese, 日本熱物性学会, 東京都, Domestic conference

    Oral presentation

  • 炭酸ガスレーザー励起酸素プラズマからの極端紫外線分光

    Masahito Tagawa, Kumiko Yokota, Hiroyuki Shimamura, Yugo Kimoto, Mayuko Koga, Hiroaki Nishimura

    第50回真空に関する連合講演会, Nov. 2009, Japanese, 日本真空協会, 東京都, Domestic conference

    Oral presentation

  • 水素化ダイヤモンドライクカーボンの表面処理と水素定量解析

    Masahito Tagawa, Kumiko Yokota

    NEDO水素貯蔵材料先端基盤研究事業 第5回材料物性グループ研究会, Nov. 2009, Japanese, JAEA, 佐用町, Domestic conference

    Oral presentation

  • 高水素化DLCフィルムへの紫外線照射による脱水素化反応

    Kumiko Yokota, Masahito Tagawa, Koji Matsumoto, Kazuhiro Kanda, Akira Kitamura

    第50回真空に関する連合講演会, Nov. 2009, Japanese, 日本真空協会, 東京都, Domestic conference

    Oral presentation

  • フッ素系ポリマーエロージョンにおける原子状酸素衝突エネルギーの効果

    Kazuhiro Kishida, Masahito Tagawa, Kumiko Yokota

    第46回日本航空宇宙学会中部・関西支部合同秋季大会, Nov. 2009, Japanese, 日本航空宇宙学会, 京都市, Domestic conference

    Oral presentation

  • 低軌道におけるテフロン系熱制御材の劣化機構:原子状酸素、紫外線、それとも?

    Kumiko Yokota, Masahito Tagawa

    第30回日本熱物性シンポジウム,, Oct. 2009, Japanese, 日本熱物性学会, 米沢市, Domestic conference

    Oral presentation

  • 地上設備を用いた低軌道原子状酸素環境試験:本当に宇宙環境を模擬できているのか?

    Masahito Tagawa, Kumiko Yokota

    第30回日本熱物性シンポジウム,, Oct. 2009, Japanese, 日本熱物性学会, 米沢市, Domestic conference

    Oral presentation

  • 衛星搭載用原子状酸素モニター装置の地上キャリブレーションに関する一考察

    Masahito Tagawa, Kumiko Yokota

    第6回宇宙環境シンポジウム, Oct. 2009, Japanese, JAXA, 北九州市, Domestic conference

    Oral presentation

  • 超低高度技術試験衛星(SLATS)開発に利用可能な原子状酸素地上試験装置の特性と限界

    Masahito Tagawa, Kumiko Yokota

    第53回宇宙科学技術連合講演会アブストラクト集, Sep. 2009, Japanese, 日本航空宇宙学会, 京都市, Domestic conference

    Oral presentation

  • 高水素化DLC膜に対する軟X線照射効果

    Kazuhiro Kanda, Masahito Niibe, Kumiko Yokota, Masahito Tagawa, Shinji Matsui

    第70回応用物理学会学術講演会, Sep. 2009, Japanese, 応用物理学会, 富山市, Domestic conference

    Oral presentation

  • 宇宙環境下で原子線表面反応により生成する分子コンタミネーション

    Masahito Tagawa, Kumiko Yokota

    第70回応用物理学会学術講演会, Sep. 2009, Japanese, 応用物理学会, 富山市, Domestic conference

    Oral presentation

  • フッ素系高分子のエッチングに及ぼす酸素原子衝突エネルギーの効果

    Kumiko Yokota, Kazuhiro Kishida, Akio Okamoto, Masahito Tagawa

    第70回応用物理学会学術講演会, Sep. 2009, Japanese, 応用物理学会, 富山市, Domestic conference

    Oral presentation

  • 生体材料への細胞接着・増殖性におよぼす原子ビーム表面改質効果

    Kumiko Yokota, Chiaki Hiwa, Masahito Tagawa, Yoshikazu Nakai, Taiji Adachi

    電気学会研究会資料、量子・光デバイス研究会, May 2009, Japanese, 電気学会, 神戸市, Domestic conference

    Oral presentation

  • 低軌道宇宙環境模擬用レーザーデトネーション型原子状酸素発生装置から発生する極端紫外線の評価とその応用に関する研究

    Masahito Tagawa, Kumiko Yokota

    レーザー研シンポジウム2009, Apr. 2009, Japanese, 大阪大学, 吹田市, Domestic conference

    Oral presentation

  • 水素化ダイヤモンドライクカーボンの表面処理と水素定量解析

    Masahito Tagawa, Kumiko Yokota

    NEDO水素貯蔵材料先端基盤研究事業 第4回材料物性グループ研究会, Mar. 2009, Japanese, JAEA, 佐用町, Domestic conference

    Oral presentation

  • 宇宙材料の耐環境性試験:現状と問題点

    Masahito Tagawa

    宇宙材料の熱物性とシステムデザイン第4回研究会, Mar. 2009, Japanese, 日本熱物性学会, 東京都, Domestic conference

    Oral presentation

  • 大気吸入型イオンエンジン(ABIE)に関する実験的研究

    Masahito Tagawa, Kazutaka Nishiyama, Kumiko Yokota, Yasuo Yoshizawa, Daisaku Yamamoto, Hitoshi Kuninaka

    平成20年度宇宙輸送シンポジウム, Jan. 2009, Japanese, JAXA, 相模原市, Domestic conference

    Oral presentation

  • 水素含有DLC薄膜の光電子分光

    Yuichi Haruyama, Masahito Tagawa, Kumiko Yokota, Shinji Matsui

    第22回日本放射光学会年会放射光科学合同シンポジウム, Jan. 2009, Japanese, 日本放射光学会, 東京都, Domestic conference

    Oral presentation

  • 2008年度軌道上材料曝露実験高度化ワーキンググループ活動報告

    Masahito Tagawa, Kumiko Yokota, Mengu Cho, Minoru Iwata, Rikio Yokota, Mineo Suzuki, Koji Matsumoto, Yugo Kimoto, Hiroyuki Shimamura

    第25回宇宙利用シンポジウム, Jan. 2009, Japanese, JAXA, 相模原市, Domestic conference

    Oral presentation

  • 宇宙環境と人工衛星-極限環境への挑戦-

    Masahito Tagawa, Kumiko Yokota

    日本航空宇宙学会関西支部2008年度ライト祭, Dec. 2008, Japanese, 日本航空宇宙学会, 大阪市, Domestic conference

    Oral presentation

  • Problems and recent trends on material degradation studies in a real and simulated space environment

    Masahito Tagawa, Kumiko Yokota

    第5回宇宙環境シンポジウム, Dec. 2008, Japanese, JAXA, つくば市, Domestic conference

    Oral presentation

  • 模擬複合宇宙環境地上試験におけるフッ素系ポリマーのシナジー効果

    Kazuhiro Kishida, Masahito Tagawa, Kumiko Yokota

    第45回日本航空宇宙学会中部・関西支部合同秋季大会, Nov. 2008, Japanese, 日本航空宇宙学会, 名古屋市, Domestic conference

    Oral presentation

  • 低軌道における原子状酸素誘起材料劣化とその分子コンタミネーション源としての可能性(2)"

    Kumiko Yokota, Masahito Tagawa

    第52回宇宙科学技術連合講演会アブストラクト集, Nov. 2008, Japanese, 日本航空宇宙学会, 淡路市, Domestic conference

    Oral presentation

  • 原子状酸素誘起ポリイミド質量減少における衝突エネルギーの効果

    Masahito Tagawa, Kazuhiro Kishida, Kumiko Yokota

    第52回宇宙科学技術連合講演会アブストラクト集, Nov. 2008, Japanese, 日本航空宇宙学会, 淡路市, Domestic conference

    Oral presentation

  • シロキサン変性ポリイミドフィルムの耐原子状酸素性評価

    Eiji Miyazaki, Masahito Tagawa, Rikio Yokota, Junichiro Ishizawa, Yugo Kimoto

    第52回宇宙科学技術連合講演会アブストラクト集, Nov. 2008, Japanese, 日本航空宇宙学会, 淡路市, Domestic conference

    Oral presentation

  • 水素化DLC膜の軟X線照射による改質効果

    kazuhiro kanda, Masahito Niibe, Masahito Tagawa, Kumiko Yokota, Shinji Matsui

    第22回ダイヤモンドシンポジウム, Oct. 2008, Japanese, ニューダイヤモンドフォーラム, 東京都, Domestic conference

    Oral presentation

  • 宇宙環境における熱制御材料の劣化現象

    Masahito Tagawa, Kumiko Yokota

    第29回日本熱物性シンポジウム,, Oct. 2008, Japanese, 日本熱物性学会, 東京都, Domestic conference

    Oral presentation

  • 水素含有ダイヤモンドライクカーボン薄膜の電子状態

    Yuichi Haruyama, Masahito Tagawa, Kumiko Yokota, Shinji Matsui

    日本物理学会2008秋季大会, Sep. 2008, Japanese, 日本物理学会, 岩手市, Domestic conference

    Oral presentation

  • 原子状酸素を照射した水素化ダイヤモンドライクカーボン薄膜の水素分布

    Masahito Tagawa, Kumiko Yokota, Akira Kitamura, Koji Matsumoto, Akitaka Yoshigoe, Yuden Teraoka

    第69回応用物理学会学術講演会, Sep. 2008, Japanese, 応用物理学会, 春日井市, Domestic conference

    Oral presentation

  • 原子ビームにより表面改質した生体材料の細胞接着性

    YOKOTA Kumiko, HIWA Chiaki, TAGAWA Masato, 安達 泰治, NAKAI Yoshikazu

    M&M2008材料力学カンファレンス, Sep. 2008, Japanese, 日本機械学会, 草津市, Domestic conference

    Oral presentation

  • フッ素系高分子材料の劣化に及ぼす原子状酸素と極端紫外線の複合効果

    Kumiko Yokota, Kazuhiro Kishida, Masahito Tagawa, Akio Okamoto

    第69回応用物理学会学術講演会, Sep. 2008, Japanese, 応用物理学会, 春日井市, Domestic conference

    Oral presentation

  • 神戸大学機械工学科におけるものづくり導入教育

    ASANO Hitoshi, TAGAWA Masato, HOSOKAWA Shigeo, HIWA Chiaki, ADACHI Kazuhiko

    平成20年度工学・工業教育研究講演会, Aug. 2008, Japanese, 日本工学教育協会, 神戸, Domestic conference

    Oral presentation

  • 摩擦誘起極表面改質ダイヤモンドライクカーボン薄膜の放射光/超音速分子線による非破壊評価

    Tagawa Masahito, Yokota Kumiko, Yoshigoe Akitaka, Teraoka Yuden, Matsumoto Koji

    第3回JAEA放射光科学研究シンポジウム, Mar. 2008, Japanese, 日本原子力研究開発機構, 兵庫県、佐用郡, Domestic conference

    Poster presentation

  • 水素化ダイヤモンドライクカーボンの表面処理と水素定量解析

    Masahito Tagawa, Kumiko Yokota

    第2回NEDO水素貯蔵材料先端基盤研究事業材料物性グループ研究会, Mar. 2008, Japanese, JAEA, 佐用町, Domestic conference

    Oral presentation

  • 宇宙航空技術におけるEUV光アブレーション

    Tagawa Masahito, Yokota Kumiko

    第55回応用物理学関係連合講演会, Mar. 2008, Japanese, 応用物理学会, 千葉県、船橋市, Domestic conference

    [Invited]

    Invited oral presentation

  • 低軌道宇宙環境下での材料曝露試験高度化のための原子状酸素収束化技術の開発

    Tagawa Masahito, Yokota Kumiko

    第24回宇宙利用シンポジウム, Jan. 2008, Japanese, 日本学術会議, 東京都, Domestic conference

    [Invited]

    Invited oral presentation

  • 軌道上材料曝露実験高度化ワーキンググループ活動報告

    Tagawa Masahito, Yokota Kumiko, Suzuki Mineo, Miyazaki Eiji, Shimamura Hiroyuki, Matsumoto Koji, Yokota Rikio, Cho Mengu, Iwata Minoru

    第24回宇宙利用シンポジウム, Jan. 2008, Japanese, 日本学術会議, 東京都, Domestic conference

    [Invited]

    Invited oral presentation

  • Erosion properties of polyimide as a monitoring material of atomic oxygen environment in space (3): Synergistic effect of atomic oxygen and ultraviolet

    Tagawa Masahito, Yokota Kumiko

    第4回宇宙環境シンポジウム, Jan. 2008, English, 宇宙航空研究開発機構, 東京都, International conference

    [Invited]

    Invited oral presentation

  • 超熱酸素原子線による水素化ダイヤモンドライクカーボン薄膜の選択的エッチング

    Tagawa Masahito, Yokota Kumiko, Kitamura Akira, Matsumoto Koji, Yamada Noriko, Kanda Kazuhiro, Niibe Masato, Yoshigoe Akitaka, Teraoka Yuden, Belin Michel, Fontaine Julien

    第48回真空に関する連合講演会, Nov. 2007, Japanese, 日本真空協会, 東京都, Domestic conference

    Oral presentation

  • 極端紫外線を除去可能な宇宙材料試験用レーザーデトネーション型原子状酸素発生装置

    Yokota Kumiko, Okamoto Akio, Kishida Kazuhiro, Yasuda Hidehiro, Tagawa Masahito

    第48回真空に関する連合講演会, Nov. 2007, Japanese, 日本真空協会, 東京都, Domestic conference

    Oral presentation

  • 低軌道宇宙環境における水素化ダイヤモンドライクカーボン薄膜と原子状酸素の反応

    Tagawa Masahito, Yokota Kumiko, Matsumoto Koji, Kitamura Akira, Yamada Noriko, Kanda Kazuhiro, Niibe Masato, Yoshigoe Akitaka, Teraoka Yuden, Belin Michel, Fontaine Julien

    第51回宇宙科学技術連合講演会, Oct. 2007, Japanese, 日本航空宇宙学会, 北海道、札幌市, Domestic conference

    Oral presentation

  • 低軌道における原子状酸素誘起材料劣化とその分子コンタミネーション源としての可能性

    Yokota Kumiko, Tagawa Masahito

    第51回宇宙科学技術連合講演会, Oct. 2007, Japanese, 日本航空宇宙学会, 北海道、札幌市, Domestic conference

    Oral presentation

  • 複合宇宙環境下における材料劣化現象とそのコンタミネーションソースとしての可能性

    Tagawa Masahito, Yokota Kumiko

    第1回コンタミネーション管理技術ワークショップ, Sep. 2007, Japanese, 物質材料研究機構, つくば市, Domestic conference

    [Invited]

    Invited oral presentation

  • 超熱フッ素原子ビームを用いたポリイミド表面のフッ素化と直接無電解めっき技術の開発(2)

    Tagawa Masahito, Maeda Kenichi, Yokota Kumiko, Akamatsu Kensuke, Nawafune Hidemi

    第68回応用物理学会学術講演会, Sep. 2007, Japanese, 応用物理学会, 北海道、札幌市, Domestic conference

    Oral presentation

  • 超熱フッ素原子ビームを用いたダイヤモンドライクカーボンの表面改質

    Yamada Noriko, Kanda Kazuhiro, Yokota Kumiko, Tagawa Masahito, Haruyama Yuichi, Matsui Shinji

    第68回応用物理学会学術講演会, Sep. 2007, Japanese, 応用物理学会, 北海道、札幌市, Domestic conference

    Oral presentation

  • レーザーデトネーション型原子線源からの極端紫外線除去用高速回転チョッパーシステム

    Yokota Kumiko, Abe Shingo, Yasuda Hidehiro, Tagawa Masahito

    第68回応用物理学会学術講演会, Sep. 2007, Japanese, 応用物理学会, 北海道、札幌市, Domestic conference

    Oral presentation

  • 二硫化モリブデン焼成膜の宇宙環境曝露による特性変化

    Matsumoto Koji, Akiyama Masao, Tagawa Masahito

    国際宇宙ステーション軌道環境技術-特殊真空対応技術の展開, Jun. 2007, Japanese, 日本真空協会, 東京都, Domestic conference

    [Invited]

    Invited oral presentation

  • 低軌道原子状酸素環境の地上シミュレーション

    Tagawa Masahito, Yokota Kumiko

    日本地球惑星科学連合2007年大会, May 2007, Japanese, 日本地球惑星科学連合, 東京都, Domestic conference

    Oral presentation

  • Photoemission Analysis with Synchrotron Radiation for Nitridation of SiO2 Thin Film on Si(001) by Irradiation of N+ Ion Beams

    TERAOKA Yuden, HACHIUE Shynsuke, YOKOTA Kumiko, TAGAWA Masahito

    American Vacuum Society 53rd International Symposium and Exhibition, Nov. 2006, English, San Francisco, International conference

    Oral presentation

  • Surface oxidation and tribological properties of a hydrogenated DLC exposed to a simulated low earth orbit space environment

    TAGAWA Masahito, YOKOTA Kumiko, OOHARA Hisanori, NAKAHIGASHI Takahiro, TERAOKA Yuden, MARTIN Jean-Miche, BELIN Michel

    The 3rd International Conference on Tribology, Oct. 2006, English, Kanazawa, International conference

    Poster presentation

  • Hyperthermal molecular beam deposition of DLC using laser-induced detonation phenomena

    TAGAWA Masahito, ASADA Hidetoshi, MATSUURA Yoshimitsu, YOKOTA Kuimiko, TERAOKA Yuden, KITAMURA Akira, FONTAINE Julien, BELIN Michel

    The 3rd International Conference on Tribology, Oct. 2006, English, Kanazawa, International conference

    Oral presentation

  • Synchrotron radiation photoemission spectroscopic study on the room temperature oxidation of Si(001):H formed by hyperthermal atomic/molecular beams

    TAGAWA Masahito, YOKOTA Kumiko, YOSHIGOE Akitaka, TERAOKA Yuden

    the 232nd American Chemical Society National Meeting and exhibition, Sep. 2006, English, San Francisco, International conference

    [Invited]

    Invited oral presentation

  • SM/SEED flight experimental results on molybdenum disulfide-based solid lubricants

    TAGAWA Masahito, ASADA Hidetoshi, YOKOTA Kumiko, MATSUMOTO Koji, AKIYAMA Masao

    ISTS-25, Jun. 2006, English, Kanazawa, International conference

    Oral presentation

  • Comparative study of polyimide and FEP on the simultaneous exposure effects on atomic oxygen and ultraviolet

    YOKOTA kumiko, OKAMOTO Akio, TAGAWA Masahito

    ISTS-25, Jun. 2006, English, Kanazawa, International conference

    Oral presentation

  • Atomic Oxygen concentration for material exposure acceleration tests in low earth orbit

    YOKOTA kumiko, IKEDA Kohei, OKAMOTO Akio, TAGAWA Masahito

    10th International Symposium on Materials in Space Environment, 8th International Space Conference, Jun. 2006, English, Collioure, International conference

    Oral presentation

  • Atomic Oxygen concentration for material exposure acceleration tests in low earth orbi

    TAGAWA Masahito, DOI Hiroaki, YOKOTA Kumiko

    10th International Symposium on Materials in Space Environment, Jun. 2006, English, Collioure, International conference

    Oral presentation

  • A novel room temperature oxidation technique using hyperthermal broad atomic/molecular beams

    TAGAWA Masahito, YOKOTA Kumiko, YOSHIGOE Akitaka, TERAOKA Yuden

    2nd International Symposium on Oxidation Reaction, May 2006, English, Osaka, International conference

    Oral presentation

  • 超熱酸素・窒素分子ビームを用いたSi表面の酸化・窒化膜形成とその光電子分光分析

    TAGAWA Masahito, YOKOTA Kumiko, TERAOKA Yuden, YOSHIGOE Akitaka

    第1回JAEA放射光科学シンポジウム, Mar. 2006, Japanese, SPring-8, Domestic conference

    Poster presentation

  • 低地球軌道上の原子状酸素によるシリコン酸化膜形成とその特徴 (3)

    YOKOTA kumiko, TAGAWA Masahito, YOSHIGOE Akitaka, TERAOKA Yuden

    第22回宇宙利用シンポジウム講演予稿集, Jan. 2006, Japanese, 東京, Domestic conference

    Oral presentation

  • Surface and tribological properties of the MoS2-based lubricants retrieved from real LEO space environment: the first and second year results obtained by SM/SEED

    AKIYAMA Masao, MATSUMOTO Koji, IMAGAWA Kichiro, OCHI Kunitaka, ASADA Hidetoshi, YOKOTA Kumiko, TAGAWA Masahito

    11th European Space Mechanisms and Tribology Symposium, Sep. 2005, English, Lucerne, International conference

    Poster presentation

  • Changes in Tribological Properties of MoS2 film exposed to LEO on SM/SEED

    MATSUMOTO Koji, IMAGAWA Kichiro, AKIYAMA Masao, TAGAWA Masahito

    World Tribology Congress III,, Sep. 2005, English, Washington D.C., International conference

    Poster presentation

  • Atomic oxygen-induced erosion of spacecraft materials -Potential hazards for spacecraft systems

    TAGAWA Masahito

    9th Spacecraft Charging Technology Conference (Plenary), Apr. 2005, English, つくば, International conference

    [Invited]

    Invited oral presentation

  • 低地球軌道上の原子状酸素利用に向けての収束化技術の開発 (3)

    Masahito Tagawa, Kumiko Yokota

    第21回宇宙利用シンポジウム, 2005, Japanese, 東京, Domestic conference

    Oral presentation

  • 超熱原子ビームによる高分子表面改質

    Masahito Tagawa

    スリービーム技術による表面改質と解析(招待講演), 2005, Japanese, 和光, Domestic conference

    [Invited]

    Invited oral presentation

  • レーザーデトネーション誘起高速原子ビーム励起表面反応

    Masahito Tagawa

    量子ビーム理工学研究最前線-その現状と今後の展望-, 2005, Japanese, Kobe, Domestic conference

    Poster presentation

  • Surface degradation of polymeric materials under hyperthermal atomic oxygen beam bombardment; temperature dependence

    YOKOTA Kumiko, TAGAWA Masahito, SEIKYU Shinsuke, OHMAE Nobuo

    International Symposium on Applications of Quantum Beam 2005, 2005, English, Kobe, International conference

    Poster presentation

  • Photoemission spectroscopy with synchrotron radiation for nitrogen-impinged Si(001) surfaces with an ultra-thin-SiO2 overlayer

    HACHIUE Syunsuke, TERAOKA Yuden, TAGAWA Masahito

    11th European Conference on Applications of Surface and Interfac, 2005, English, Vienna, International conference

    Poster presentation

  • Passive oxidation of Si(001) by hyperthermal atomic oxygen beam -A synchrotron radiation photoemission spectroscopic study-

    TAGAWA Masahito, SOGO Chie, MIYAGAI Suguru, YOKOTA Kumiko, YOSHIGOE Akitaka, TERAOKA Yuden

    International Symposium on Applications of Quantum Beam 2005, 2005, English, Kobe, International conference

    Poster presentation

  • Atomic oxygen-induced polymer degradation phenomena in simulated LEO space environments: How do polymers react in a complicated space environment?

    TAGAWA Masahito, YOKOTA Kumiko

    56th International Astronautical Congress, 2005, English, Fukuoka, International conference

    Oral presentation

  • Atomic oxygen-induced erosion of polymeric materials under surface charging conditio

    YOKOTA Kumiko, OHMAE Nobuo, SEIKYU Shinsuke, TAGAWA Masahito

    9th Spacecraft Charging Technology Conference, 2005, English, つくば, International conference

    Oral presentation

  • プラズマCVD法により作製したカーボンナノチューブの配向制御

    KUME Ippei, SAKAI Hirokazu, KINOSHITA Hiroshi, TAGAWA Masahito, SEIKYU Shinsuke, OHMAE Nobuo

    第51回応用物理学関係連合講演会, Mar. 2004, Japanese, 応用物理学会, 東京工科大学, Domestic conference

    Oral presentation

  • 表面帯電時における原子状酸素誘起高分子エロージョン

    横田 久美子, 田川 雅人

    第1回宇宙環境シンポジウム, 2004, Japanese, 日本航空宇宙学会関西支部, 宇宙航空研究開発機構, Domestic conference

    Oral presentation

  • 熱電子原子ビームによる炭素系薄膜作成の試み

    浅田 秀俊, 横田 久美子, 大前 伸夫, 田川 雅人

    第45回真空に関する連合講演会, 2004, Japanese, 日本真空協会, 大阪大学, Domestic conference

    Oral presentation

  • 二硫化モリブデン皮膜に及ぼす原子状酸素と紫外線の複合効果-第2報-

    MATSUMOTO Koji, SUZUKI Mineo, OBARA Shingo, TAGAWA Masahito

    トライボロジー会議2004秋, 2004, Japanese, 日本トライボロジー学会, 鳥取, Domestic conference

    Oral presentation

  • 低地球軌道上の原子状酸素環境利用に向けての収束化技術の開発(2)

    田川 雅人, 横田 久美子, 大前 伸夫

    第20回宇宙利用シンポジウム, 2004, Japanese, 宇宙航空研究開発機構, 宇宙航空研究開発機構・宇宙科学研究本部, Domestic conference

    Oral presentation

  • 低地球軌道上の原子状酸素によるシリコン酸化膜形成とその特徴

    横田 久美子, 大前 伸夫, 田川 雅人

    第20回宇宙利用シンポジウム, 2004, Japanese, 宇宙航空研究開発機構, 宇宙航空研究開発機構・宇宙科学研究本部, Domestic conference

    Oral presentation

  • 低地球軌道上における高効率原子状酸素収束化技術の開発(2)

    DOI Hiroaki, YOKOTA Kumiko, OHMAE Nobuo, TAGAWA Masahito

    第41回日本航空宇宙学会中部関西支部合同秋期大会, 2004, Japanese, 日本航空宇宙学会関西支部, 名城大学, Domestic conference

    Oral presentation

  • 低軌道宇宙環境におけるポリイミドの表面劣化(3)-原子状酸素と紫外線の複合照射における定量化-

    横田 久美子, 清久 慎右, 田川 雅人, 大前 伸夫

    第48回宇宙科学技術連合講演会, 2004, Japanese, 日本航空宇宙学会, 福井県福井市, Domestic conference

    Oral presentation

  • 超熱原子状酸素ビームによる高分子材料のガス化反応-高温での温度依存性について-

    YOKOTA kumiko, SEIKYU Shinsuke, OHMAE Nobuo, TAGAWA Masahito

    第65回応用物理学会学術講演会, 2004, Japanese, 応用物理学会, 東北学院大学, Domestic conference

    Oral presentation

  • 超熱原子状酸素ビームによる高分子材料のガス化反応-温度依存性について-

    横田 久美子, 田川 雅人, 清久 慎右, 大前 伸夫

    第51回応用物理学関係連合講演会, 2004, Japanese, 応用物理学会, 東京工科大学, Domestic conference

    Oral presentation

  • 超熱原子状酸素ビームによるSi02極薄膜の形成

    SOGO Chie, YOKOTA Kumiko, OHMAE Nobuo, TAGAWA Masahito, YOSHIGOE Akitaka, TERAOKA Yuden

    第45回真空に関する連合講演会, 2004, Japanese, 日本真空協会, 大阪大学, Domestic conference

    Oral presentation

  • 超熱原子状酸素ビームにより形成したSi(001)極薄酸化膜のXPS解析

    SOGO Chie, 裙本 晋之助, 横田 久美子, 田川 雅人, 大前 伸夫, 寺岡 有殿

    第51回応用物理学関係連合講演会, 2004, Japanese, 応用物理学会, 東京工科大学, Domestic conference

    Oral presentation

  • 超熱原子状フッ素ビームの形成と評価

    前田 健一, 横田 久美子, 大前 伸夫, 田川 雅人

    第45回真空に関する連合講演会, 2004, Japanese, 日本真空協会, 大阪大学, Domestic conference

    Oral presentation

  • 走査電子顕微鏡組込みマイクロトライボメーターによる垂直配向カーボンナノチューブ薄膜のマイクロトライボロジーの解明

    木之下 博, 久米 一平, 田川 雅人, 大前 伸夫

    第65回応用物理学会学術講演会, 2004, Japanese, 応用物理学会, 東北学院大学, Domestic conference

    Oral presentation

  • 垂直配向カーボンナノチューブ薄膜のマイクロトライボロジー

    木之下 博, 久米 一平, 酒井 洋和, 田川 雅人, 大前 伸夫

    第51回応用物理学関係連合講演会, 2004, Japanese, 応用物理学会, 東京工科大学, Domestic conference

    Oral presentation

  • 原子状酸素誘起高分子材料劣化における表面帯電の影響

    清久 慎右, 横田 久美子, 大前 伸夫, 田川 雅人

    第41回日本航空宇宙学会中部関西支部合同秋期大会, 2004, Japanese, 日本航空宇宙学会関西支部, 名城大学, Domestic conference

    Oral presentation

  • 原子状酸素収束器の開発(3)

    田川 雅人, 土井 洋明, 横田 久美子, 大前 伸夫

    第48回宇宙科学技術連合講演会, 2004, Japanese, 日本航空宇宙学会, 福井県福井市, Domestic conference

    Oral presentation

  • 原子ビームを用いた細胞のマイクロパターンニング

    河東 万智子, 安達 泰治, 佐藤 克也, 田川 雅人

    関西支部第79期定時総会講演会, 2004, Japanese, 日本機械学会関西支部, 大阪府立大学, Domestic conference

    Oral presentation

  • 円周走査型走査原子間力顕微鏡による局面形状の精密測定

    木之下 博, 田川 雅人, 大前 伸夫

    トライボロジー会議2004秋, 2004, Japanese, 日本トライボロジー学会, 鳥取, Domestic conference

    Oral presentation

  • プラズマCVD法により作製したカーボンナノチューブの配向性制

    久米 一平, 酒井 洋和, 木之下 博, 田川 雅人, 大前 伸夫

    第52回応用物理学関係連合講演会, 2004, Japanese, 応用物理学会, 未記入, Domestic conference

    Oral presentation

  • コンピュータシミュレーションによるホーン型原子状酸素収束器の最適化

    田川 雅人, 土井 洋明, 横田 久美子, 大前 伸夫

    第51回応用物理学関係連合講演会, 2004, Japanese, 応用物理学会, 東京工科大学, Domestic conference

    Oral presentation

  • カーボンナノチューブ薄膜のマイクロトライボロジー -走査電子顕微鏡組込みマイクロトライボメーターによる観察-

    木之下 博, 久米 一平, 田川 雅人, 大前 伸夫

    トライボロジー会議2004春, 2004, Japanese, 日本トライボロジー学会, 機械振興会館, Domestic conference

    Oral presentation

  • カーボンナノチューブ薄膜のマイクロトライボロジー特性におよぼす摩擦相手材の影響

    木之下 博, 久米 一平, 大畠 民生, 田川 雅人, 大前 伸夫

    トライボロジー会議2004秋, 2004, Japanese, 日本トライボロジー学会, 鳥取, Domestic conference

    Oral presentation

  • Si基板上に成長させたC60薄膜のナノトライボロジー特性

    鈴木 宏樹, 木之下 博, 田川 雅人, 大前 伸夫

    トライボロジー会議2004秋, 2004, Japanese, 日本トライボロジー学会, 鳥取, Domestic conference

    Oral presentation

  • Si(111)表面からのアルカリ金属イオン放出

    OHNISHI Yuki, OHMAE Nobuo, TAGAWA Masahito, SHIOTA Tadashi

    第65回応用物理学会学術講演会, 2004, Japanese, 応用物理学会, 東北学院大学, Domestic conference

    Oral presentation

  • Si(001)の超熱原子状酸素ビーム酸化における酸化曲線

    田川 雅人, 十河 千恵, 横田 久美子, 大前 伸夫, 寺岡 有殿

    第65回応用物理学会学術講演会, 2004, Japanese, 応用物理学会, 東北学院大学, Domestic conference

    Oral presentation

  • MoS2焼成膜の宇宙環境曝露での劣化特性について-SM-SEED軌道上1年曝露-

    田川 雅人, 松本 康司, 秋山 正雄

    第48回宇宙科学技術連合講演会, 2004, Japanese, 日本航空宇宙学会, 福井県福井市, Domestic conference

    Oral presentation

  • mN荷重域でのカーボンナノチューブ薄膜のトライボロジー特性

    KUME Ippei, OKADA Shinsaku, KINOSHITA Hiroshi, TAGAWA Masahito, OHMAE Nobuo

    トライボロジー会議2004秋, 2004, Japanese, 日本トライボロジー学会, 鳥取, Domestic conference

    Oral presentation

  • 原子状酸素照射による細胞接着パターンの作成

    梶田 文昭, 松本 康志, 佐藤 克也, 田川 雅人, 安達 泰治

    日本機械学会第15回バイオエンジニアリング部門講演会(BE2003), Jan. 2003, Japanese, 日本機械学会 バイオエンジニアリング部門, 大阪大学コンベンションセンター, Domestic conference

    Oral presentation

  • 低地球軌道上における高効率原子状酸素収束化技術の開発

    土井 洋明, 横田 久美子, 田川 雅人, 大前 伸夫

    第40回日本航空宇宙学会関西・中部支部合同秋季大会, 2003, Japanese, 日本航空宇宙学会関西・中部支部, 神戸大学 神大会館, Domestic conference

    Oral presentation

  • 低軌道宇宙環境の原子状酸素を用いたSi酸化膜の形成

    十河 千恵, 裙本 晋之助, 横田 久美子, 田川 雅人, 大前 伸夫

    第40回日本航空宇宙学会関西・中部支部合同秋季大会, 2003, Japanese, 日本航空宇宙学会関西・中部支部, 神戸大学 神大会館, Domestic conference

    Oral presentation

  • 低軌道宇宙環境におけるポリイミドの表面劣化(3)-原子状酸素を紫外線の複合照射における定量化-

    横田 久美子, 清久 慎介, 田川 雅人, 大前 伸夫

    第47回宇宙科学技術連合講演会, 2003, Japanese, 日本航空宇宙学会, 新潟コンベンションセンター, Domestic conference

    Oral presentation

  • 超熱原子状酸素によるSiO2酸化膜の室温形成

    裙本 晋之助, 十河 千恵, 木之下 博, 横田 久美子, 田川 雅人, 大前 伸夫

    第64回応用物理学会学術講演会, 2003, Japanese, 応用物理学会, 福岡大学, Domestic conference

    Oral presentation

  • 炭素系材料マイクロトライボロジー特性におよぼす相対湿度の影響

    木之下 博, 久米 一平, 酒井 洋和, 田川 雅人, 大前 伸夫

    トライボロジー会議, 2003, Japanese, 日本トライボロジー学会, 新潟, Domestic conference

    Oral presentation

  • 原子状酸素照射時の温度および紫外線の複合効果

    清久 慎右, 横田 久美子, 田川 雅人, 大前 伸夫

    第40回日本航空宇宙学会関西・中部支部合同秋季大会, 2003, Japanese, 日本航空宇宙学会関西・中部支部, 神戸大学 神大会館, Domestic conference

    Oral presentation

  • 原子状酸素収束器の開発(2)

    田川 雅人, 土井 洋明, 横田 久美子, 大前 伸夫

    第47回宇宙科学技術連合講演会, 2003, Japanese, 日本航空宇宙学会, 新潟コンベンションセンター, Domestic conference

    Oral presentation

  • 原子状酸素ビーム照射によるポリイミドの質量減少:入射角依存性について

    横田 久美子, 田川 雅人, 清久 慎右, 大前 伸夫

    第64回応用物理学会学術講演会, 2003, Japanese, 応用物理学会, 福岡大学, Domestic conference

    Oral presentation

  • 原子ビームを用いた材料表面改質と細胞接着制御

    安達 泰治, 梶田 文昭, 佐藤 克也, 松本 康志, 田川 雅人

    日本材料学会第52期学術講演会, 2003, Japanese, 日本材料学会, 工学院大学, Domestic conference

    Oral presentation

  • 急冷却時におけるSi(111)からの非定常イオン放出現象

    寺本 泰章, 大西 優輝, 田川 雅人, 大前 伸夫, 塩田 忠

    第44回真空に関する連合講演会, 2003, Japanese, 日本真空協会, 機械振興会館, Domestic conference

    Oral presentation

  • 宇宙用高分子材料の原子状酸素劣化における帯電の影響-神戸大学の取り組み-

    横田 久美子, 前田 健一, 清久 慎右, 大前 伸夫, 田川 雅人

    第6回宇宙飛翔体環境研究会, 2003, Japanese, 地球電磁気・地球惑星圏学会分科会, 筑波宇宙センター, Domestic conference

    Oral presentation

  • コンピュータシミュレーションによる原子状酸素収束用ミラーの最適化

    田川 雅人, 土井 洋明, 横田 久美子, 大前 伸夫

    第64回応用物理学会学術講演会, 2003, Japanese, 応用物理学会, 福岡大学, Domestic conference

    Oral presentation

  • カーボンナノチューブの生成とマイクロトライボロジー特性

    久米 一平, 坂井 洋和, 木之下 博, 田川 雅人, 大前 伸夫

    トライボロジー会議, 2003, Japanese, 日本トライボロジー学会, 新潟, Domestic conference

    Oral presentation

Association Memberships

  • 日本表面科学会

  • 日本真空協会

  • 日本機械学会

  • トライボロジー学会

  • アメリカ化学会

  • アメリカ航空宇宙学会

  • 電気学会

  • 日本航空宇宙学会

  • 応用物理学会

Research Projects

Social Contribution

  • 外部講師

    市立西宮高等学校

    Lecturer, 理系進路説明会