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Feasibility Study on Electron Emission Device using Diamond Semiconductors for Space Applications

Research Project

Project/Area Number 16H04595
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Aerospace engineering
Research InstitutionJapan Aerospace EXploration Agency

Principal Investigator

Ohkawa Yasushi  国立研究開発法人宇宙航空研究開発機構, 研究開発部門, 主任研究開発員 (20415920)

Co-Investigator(Kenkyū-buntansha) 加藤 宙光  国立研究開発法人産業技術総合研究所, エネルギー・環境領域, 主任研究員 (00415655)
田川 雅人  神戸大学, 工学研究科, 准教授 (10216806)
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥16,380,000 (Direct Cost: ¥12,600,000、Indirect Cost: ¥3,780,000)
Fiscal Year 2018: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
Fiscal Year 2017: ¥5,850,000 (Direct Cost: ¥4,500,000、Indirect Cost: ¥1,350,000)
Fiscal Year 2016: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Keywords宇宙ごみ(スペースデブリ) / 宇宙推進 / エレクトロダイナミックテザー / ダイヤモンド半導体 / 電子放出 / スペースデブリ / 航空宇宙工学 / スペースデブリ除去
Outline of Final Research Achievements

Feasibility of electron emission devices using diamond semiconductors for space was investigated aiming at the future application to space debris mitigation technologies. The first major result is that the thermionic electron emission from the diamond semiconductor at low temperature, which was reported in previous studies, was reproduced using a simple heating system. It was also shown that how the low-work-function state degrades by atomic oxygen in the low Earth orbit environment. These results are an important bases for future space applications of diamond semiconductors.

Academic Significance and Societal Importance of the Research Achievements

本研究成果の主な適用先は、宇宙ごみを除去するための推進装置である。エレクトロダイナミックテザーと呼ばれる地球磁場を利用したユニークな推進機や、近年多く利用されるようになってきた電気推進機では、何らかの電子放出装置が必要となる。ダイヤモンド半導体の適用によりこれらの電子放出源を簡素化できれば、より効率的な推進システムの構築が可能となり、人類共通の課題となりつつある宇宙ごみ問題解決への一助となる。
また、ダイヤモンド半導体の宇宙用電子放出源への応用は初の試みであり、地球低軌道環境がその電子放出特性に与える影響も初めて評価された。

Report

(4 results)
  • 2019 Final Research Report ( PDF )
  • 2018 Annual Research Report
  • 2017 Annual Research Report
  • 2016 Annual Research Report
  • Research Products

    (13 results)

All 2019 2018 2017

All Journal Article (4 results) (of which Peer Reviewed: 4 results,  Open Access: 1 results) Presentation (9 results) (of which Int'l Joint Research: 5 results)

  • [Journal Article] Ion Thruster Operation with Carbon Nanotube Field Emission Cathode2019

    • Author(s)
      Yamamoto Naoji、Morita Taichi、Ohkawa Yasushi、Nakano Masakatsu、Funaki Ikkoh
    • Journal Title

      Journal of Propulsion and Power

      Volume: 35 Issue: 2 Pages: 490-493

    • DOI

      10.2514/1.b37214

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Charging Behavior of the H-II Transfer Vehicle by Active Electron Emission2019

    • Author(s)
      Ohkawa Yasushi、Okumura Teppei、Kawamoto Satomi、Kobayashi Yuki
    • Journal Title

      IEEE Transactions on Plasma Science

      Volume: 47 Issue: 8 Pages: 3852-3857

    • DOI

      10.1109/tps.2019.2915819

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Operation of a carbon nanotube field-emission cathode in low Earth orbit2019

    • Author(s)
      Ohkawa Yasushi、Okumura Teppei、Iki Kentaro、Okamoto Hiroyuki、Kawamoto Satomi
    • Journal Title

      Journal of Vacuum Science & Technology B

      Volume: 37 Issue: 2 Pages: 022203-022203

    • DOI

      10.1116/1.5067299

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Field Emission Cathodes for an Electrodynamic Tether Experiment on the H-II Transfer Vehicle2018

    • Author(s)
      Yasushi OHKAWA, Teppei OKUMURA, Yuuta HORIKAWA, Yoshiyuki MIURA, Satomi KAWAMOTO, Koichi INOUE
    • Journal Title

      TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, AEROSPACE TECHNOLOGY JAPAN

      Volume: 16 Issue: 1 Pages: 63-68

    • DOI

      10.2322/tastj.16.63

    • NAID

      130006301927

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed
  • [Presentation] ダイヤモンド半導体の宇宙用電子放出源への適用可能性評価2019

    • Author(s)
      恒川 尚輝、大川 恭志、加藤 宙光、山極 芳樹
    • Organizer
      平成30年度宇宙輸送シンポジウム
    • Related Report
      2018 Annual Research Report
  • [Presentation] Research and Development Status of a Miniature Ion Engine2019

    • Author(s)
      Yamamoto Naoji、Adachi Misaki、Ikeda Ryo、Takesue Ippei、Morita Taichi、Nakano Masakatsu、Ohkawa Yasushi、Funaki Ikkoh
    • Organizer
      32nd International Symposium on Space Technology and Science
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 低地球軌道上におけるカーボンナノチューブ電子放出源の性能変化について2019

    • Author(s)
      深見 侑希、大川 恭志、河本 聡美、横田 久美子、田川 雅人
    • Organizer
      第16回宇宙環境シンポジウム
    • Related Report
      2018 Annual Research Report
  • [Presentation] Results of Field-Emission Cathode Operation on the H-II Transfer Vehicle2018

    • Author(s)
      Ohkawa Yasushi、Okumura Teppei、Horikawa Yuuta、Miura Yoshiyuki、Kawamoto Satomi、Inoue Koichi
    • Organizer
      69th International Astronautical Congress (IAC)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Structural characterization and emission properties of phosphorus-doped NCD films2018

    • Author(s)
      Hiromitsu Kato, Takatoshi Yamada, Yasushi Ohkawa, Masahiko Ogura, Toshiharu Makino, Satoshi Yamasaki
    • Organizer
      The 31st International Vacuum Nanoelectronics Conference
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Operation of a Carbon Nanotube Field-Emission Cathode in Low Earth Orbit2018

    • Author(s)
      Yasushi Ohkawa, Teppei Okumura, Kentaro Iki, Hiroyuki Okamoto, Satomi Kawamoto
    • Organizer
      The 31st International Vacuum Nanoelectronics Conference
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] A Quick Review of an Electrodynamic Tether Experiment on the H-II Transfer Vehicle2017

    • Author(s)
      Yasushi Ohkawa, Kentaro Iki, Teppei Okumura, Satomi Kawamoto, Yuuta Horikawa, Koichi Inoue, Yuki Kobayashi, Takashi Uchiyama, Toru Kasai
    • Organizer
      35th International Electric Propulsion Conference
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] カーボンナノチューブカソード研究開発の現状2017

    • Author(s)
      大川恭志,奥村哲平
    • Organizer
      第61回宇宙科学技術連合講演会
    • Related Report
      2017 Annual Research Report
  • [Presentation] ダイヤモンド半導体を用いた宇宙用電子放出源の実現可能性検討2017

    • Author(s)
      恒川尚輝、大川恭志、加藤宙光、山極芳樹
    • Organizer
      第61回宇宙科学技術連合講演会
    • Related Report
      2017 Annual Research Report

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Published: 2016-04-21   Modified: 2021-02-19  

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