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Development of an electrodeless absorption and emission cell for application to remote sensing of planetary upper atmospheres

Research Project

Project/Area Number 16K13887
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Space and upper atmospheric physics
Research InstitutionRikkyo University

Principal Investigator

TAGUCHI Makoto  立教大学, 理学部, 教授 (70236404)

Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2018: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2017: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2016: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Keywords惑星コロナ / 散逸大気 / ハビタブルゾーン / 水素ライマンアルファ / 大気散逸 / オーロラ / 大気光
Outline of Final Research Achievements

A new absorption cell technique has been developed for measuring hydrogen escape and hydrogen deuterium ratio of planets and comets in the solar system. To maximize the performance of the developed cell, size, length and power of a filament, optical path length and hydrogen gas density have been optimized by an experiment using a spectrometer with ultra-high spectral resolution. It is found that not only depth of absorption but also stability of absorption is important in designing a cell. Satellite and planetary missions using the absorption cell technique developed in this study have been under consideration.

Academic Significance and Societal Importance of the Research Achievements

生命の誕生に液体の水の存在は不可欠であると考えられている。惑星や太陽系内小天体から散逸する水素原子の計測はそれらの天体に液体の水が現在どれだけ存在するか、あるいは過去にどれだけ存在したかを知る手がかりとなる。散逸する水素原子が散乱する太陽紫外線強度から水素原子密度と温度を推定することができる。しかしそのためには、高い波長分解能の分光器が必要である。本研究で開発された水素吸収セル法は小型軽量で高性能分光器に匹敵する波長分解能を実現できるため、それらの天体を対象とする宇宙ミッションに重要な観測手段を提供する。

Report

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

    (8 results)

All 2018 2016

All Journal Article (2 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 2 results) Presentation (6 results) (of which Int'l Joint Research: 2 results,  Invited: 1 results)

  • [Journal Article] Evaluation of hydrogen absorption cells for observations of the planetary coronas2018

    • Author(s)
      Kuwabara, M., M. Taguchi, K. Yoshioka, T. Ishida, N. de Oliveira, K. Ito, S. Kameda, F. Suzuki, and I. Yoshikawa
    • Journal Title

      Rev. Sci. Instr.

      Volume: 89 Pages: 0231111-10

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Evaluation of hydrogen absorption cells for observations of the planetary coronas2018

    • Author(s)
      Kuwabara M., Taguchi M., Yoshioka K., Ishida T., de Oliveira N., Ito K., Kameda S., Suzuki F., and Yoshikawa I.
    • Journal Title

      Review of Scientific Instruments

      Volume: 89 Issue: 2 Pages: 023111-023111

    • DOI

      10.1063/1.5007812

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Optimization of the hydrogen absorption cell dedicated to small satellite missions2018

    • Author(s)
      Masaki Kuwabara, Makoto Taguchi, Kazuo Yoshioka, Shingo Kameda, and Ichiro Yoshikawa
    • Organizer
      2018 AGU Fall Meeting
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] D/H吸収セルの開発と惑星科学への貢献2018

    • Author(s)
      吉岡和夫、桑原正輝、田口 真、川原琢也、亀田真吾、吉川一朗
    • Organizer
      第19回惑星圏研究会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Optimization of the hydrogen absorption cell dedicated for ultra-small missions2018

    • Author(s)
      M. Kuwabara, M. Taguchi, K. Yoshioka, S. Kameda, F. Suzuki, and I. Yoshikawa
    • Organizer
      JpGU-AGU Joint Meeting 2018
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] D/H吸収セルの開発と惑星科学への貢献2018

    • Author(s)
      吉岡和夫、桑原正輝、田口 真、川原琢也、亀田真吾、吉川一朗
    • Organizer
      惑星圏研究会
    • Related Report
      2017 Research-status Report
  • [Presentation] 水素吸収セル法による惑星コロナ観測2016

    • Author(s)
      田口 真
    • Organizer
      「プラズマ科学における分光計測の高度化と原子分子過程研究の新展開」「原子分子データ応用フォーラムセミナー」合同研究会
    • Place of Presentation
      核融合科学研究所(岐阜県土岐市)
    • Year and Date
      2016-12-20
    • Related Report
      2016 Research-status Report
    • Invited
  • [Presentation] Evaluation of hydrogen absorption cells for observation of the planetary coronas2016

    • Author(s)
      Masaki Kuwabara, Makoto Taguchi, Kazuo Yoshioka, Tokio Ishida, Shingo Kameda, and Ichiro Yoshikawa
    • Organizer
      地球電磁気・地球惑星圏学会
    • Place of Presentation
      九州大学(福岡県福岡市)
    • Year and Date
      2016-11-19
    • Related Report
      2016 Research-status Report

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Published: 2016-04-21   Modified: 2020-03-30  

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