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Laboratory approach to the solar atmospheric plasma with a wide temperature range from the chromosphere to the corona

Research Project

Project/Area Number 19H00665
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Review Section Medium-sized Section 14:Plasma science and related fields
Research InstitutionThe University of Electro-Communications

Principal Investigator

Nakamura Nobuyuki  電気通信大学, レーザー新世代研究センター, 教授 (50361837)

Co-Investigator(Kenkyū-buntansha) 原 弘久  国立天文台, SOLAR-Cプロジェクト, 教授 (20270457)
村上 泉  核融合科学研究所, ヘリカル研究部, 教授 (30290919)
坂上 裕之  核融合科学研究所, ヘリカル研究部, 助教 (40250112)
山本 則正  中部大学, 工学部, 准教授 (40350326)
加藤 太治  核融合科学研究所, ヘリカル研究部, 准教授 (60370136)
Project Period (FY) 2019-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥45,760,000 (Direct Cost: ¥35,200,000、Indirect Cost: ¥10,560,000)
Fiscal Year 2022: ¥8,190,000 (Direct Cost: ¥6,300,000、Indirect Cost: ¥1,890,000)
Fiscal Year 2021: ¥8,710,000 (Direct Cost: ¥6,700,000、Indirect Cost: ¥2,010,000)
Fiscal Year 2020: ¥8,840,000 (Direct Cost: ¥6,800,000、Indirect Cost: ¥2,040,000)
Fiscal Year 2019: ¥20,020,000 (Direct Cost: ¥15,400,000、Indirect Cost: ¥4,620,000)
Keywords多価イオン / 太陽コロナ / 真空紫外スペクトル / プラズマ診断 / 鉄多価イオン / プラズマモデル / Solar-C
Outline of Research at the Start

「太陽コロナはなぜ高温を保てるのか?太陽フレアはどのようにして発生するのか?」これら天文学最大とも言われる問いに答えるべく、真空紫外から極端紫外の広い波長域で彩層からコロナまでの広い温度域を継ぎ目なく分光診断するSolar-C計画が提案されている。本研究はそれに先立ち、広い温度域にわたる太陽大気プラズマに実験室から迫るものである。具体的には、電子ビームイオントラップで得られる良く定義された実験室プラズマのスペクトルをベンチマークとすることで、非平衡プラズマモデルを構築する。これら実験とモデルから近未来の太陽観測で得られるスペクトルや起こり得る問題を予見する他、診断に必要なデータ・体制を整える。

Outline of Final Research Achievements

We have succeeded in obtaining spectroscopic data of highly charged ions, which are important for the next-generation solar-observing satellite Solar-C_EUVST, by using a new vacuum ultraviolet spectrometer originally developed for the electron beam ion trap in our laboratory. In particular, measurement of ionization cross section by a new method through the observation of emission lines of Ne VII, which are important for the diagnostics with the Solar-C_EUVST. In addition, by observing extreme ultraviolet lines in the shorter wavelength region with an existing spectrometer, the density dependence of Ar XIV emission lines and the electron energy dependence of Fe XV emission lines, which are important for solar corona diagnostics, were investigated, and the collisional radiative model calculations used for the diagnostics were successfully evaluated.

Academic Significance and Societal Importance of the Research Achievements

Solar-C_EUVSTを用いて近未来に得られるであろう多価イオンの発光スペクトルを実験室で得ることにより、太陽コロナプラズマ診断のモデル計算を実験室の良く定義されたプラズマにより評価した。将来の太陽観測に資するものであり、その学術的意義は大きい。また、太陽物理、プラズマ物理、原子分子物理という異なる分野間の学際的研究により成果を得たことも学術的意義の一つである。本研究課題において得られた顕著な結果については、電気通信大学によってプレスリリースすることで社会に発信し、反響を得た。

Report

(6 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • 2019 Comments on the Screening Results   Annual Research Report
  • Research Products

    (20 results)

All 2023 2022 2021 2020 Other

All Journal Article (6 results) (of which Peer Reviewed: 6 results,  Open Access: 4 results) Presentation (12 results) (of which Int'l Joint Research: 4 results,  Invited: 1 results) Remarks (2 results)

  • [Journal Article] Energy Dependence of the Line Ratio I(233.9 A)/I(243.8 A) in Fe xv Observed with an Electron Beam Ion Trap2023

    • Author(s)
      Sakaue Hiroyuki A.、Kato Daiji、Yamamoto Norimasa、Murakami Izumi、Hara Hirohisa、Nakamura Nobuyuki
    • Journal Title

      The Astrophysical Journal

      Volume: 943 Issue: 1 Pages: 14-14

    • DOI

      10.3847/1538-4357/aca895

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Evaluation of Fe XIV Intensity Ratio for Electron Density Diagnostics by Laboratory Measurements2021

    • Author(s)
      Kambara Nagaaki、Kawate Tomoko、Oishi Tetsutarou、Kawamoto Yasuko、Sakaue Hiroyuki A.、Kato Daiji、Nakamura Nobuyuki、Hara Hirohisa、Murakami Izumi
    • Journal Title

      Atoms

      Volume: 9 Issue: 3 Pages: 60-60

    • DOI

      10.3390/atoms9030060

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] A Wide Vacuum Ultraviolet Range Spectrometer for Use with an Electron Beam Ion Trap2021

    • Author(s)
      Nakamura Nobuyuki、Numadate Naoki、Sakaue Hiroyuki A.
    • Journal Title

      Journal of the Physical Society of Japan

      Volume: 90 Issue: 11

    • DOI

      10.7566/jpsj.90.114301

    • NAID

      210000159430

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Electron Density Dependence of Extreme Ultraviolet Line Intensity Ratios in Ar XIV2021

    • Author(s)
      Nakamura Nobuyuki、Numadate Naoki、Kono Yasutaka、Murakami Izumi、Kato Daiji、Sakaue Hiroyuki A.、Hara Hirohisa
    • Journal Title

      The Astrophysical Journal

      Volume: 921 Issue: 2 Pages: 115-115

    • DOI

      10.3847/1538-4357/ac1c6f

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Emission Lines in 290-360 nm of Highly Charged Tungsten Ions W20+-W29+2021

    • Author(s)
      Era Shota、Kato Daiji、Sakaue Hiroyuki A.、Umezaki Toshiki、Nakamura Nobuyuki、Murakami Izumi
    • Journal Title

      Atoms

      Volume: 9 Issue: 3 Pages: 63-63

    • DOI

      10.3390/atoms9030063

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Resonant electron impact excitation of highly charged Fe ions studied with a compact electron beam ion trap2020

    • Author(s)
      M. Monobe, H.A. Sakaue, D. Kato, I. Murakami, H. Hara, T. Watanabe, N. Nakamura
    • Journal Title

      X-Ray Spectrometry

      Volume: 0 Issue: 4 Pages: 1-4

    • DOI

      10.1002/xrs.3148

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] Detailed analysis of atomic processes relevant to the line intensity ratio of FeXV(233.9A/243.8A) in a compact electron beam ion trap2022

    • Author(s)
      Norimasa Yamamoto, Hiroyuki A. Sakaue, Daiji Kato, and Nobuyuki Nakamura
    • Organizer
      20th International Conference on the Physics of Highly Charged Ions (HCI2022)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Observation of vacuum ultraviolet transitions relevant to astrophysical plasmas with a compact electron beam ion trap2022

    • Author(s)
      Masayoshi Hosoya, Daiji Kato, Nobuyuki Nakamura
    • Organizer
      20th International Conference on the Physics of Highly Charged Ions (HCI2022)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Observation of extreme ultraviolet spectra relevant to the electron density diagnostics of solar corona active regions2022

    • Author(s)
      Yasutaka Kono, Norimasa Yamamoto, Daiji Kato, Hiroyuki A. Sakaue, Izumi Murakami, Hirohisa Hara, Nobuyuki Nakamura
    • Organizer
      20th International Conference on the Physics of Highly Charged Ions (HCI2022)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Plasma atomic processes studied with two complementary electron beam ion traps in Tokyo2022

    • Author(s)
      Nobuyuki NAKAMURA
    • Organizer
      The 31st International Toki Conference on Plasma and Fusion Research (ITC31)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 電子ビームイオントラップを用いた多価イオンの真空紫外分光2022

    • Author(s)
      中村信行
    • Organizer
      原子分子データ応用フォーラムセミナー
    • Related Report
      2022 Annual Research Report
  • [Presentation] 電子密度診断に用いるMg VII輝線強度比の衝突輻射モデルの構築、及び評価2022

    • Author(s)
      神原永昌, 川手朋子, 大石鉄太郎, 川本靖子, 坂上裕之, 加藤太治, 中村信行, 原弘久, 村上泉
    • Organizer
      日本天文学会2022年秋季年会
    • Related Report
      2022 Annual Research Report
  • [Presentation] FeXV(233 A/243 A)線強度比の密度依存性2022

    • Author(s)
      山本則正, 加藤太治, 坂上裕之, 中村信行
    • Organizer
      日本物理学会第77回年次大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Ar XIVにおけるEUV発光線強度比の電子密度依存性2021

    • Author(s)
      河野泰隆, 沼館直樹, 大野望海, 坂上裕之, 加藤太治, 村上泉, 原弘久, 中村信行
    • Organizer
      日本物理学会2021年秋季大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Spectroscopic studies of heavy ions relevant to astrophysics2021

    • Author(s)
      N. Nakamura
    • Organizer
      RIKEN r-EMU workshop
    • Related Report
      2021 Annual Research Report
  • [Presentation] 多価イオンの極端紫外域発光線の強度比測定2021

    • Author(s)
      細谷征由, 河野泰隆, 坂上裕之, 加藤太治, 村上泉, 原弘久, 中村信行
    • Organizer
      原子衝突学会第46回年会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 太陽フレアの密度診断に有用なEUV発光線強度比の測定2021

    • Author(s)
      河野泰隆,細谷征由,沼館直樹,坂上裕之,加藤太治,村上泉,原弘久,中村信行
    • Organizer
      原子衝突学会第46回年会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 電子ビームイオントラップによる多価イオンEUVスペクトル強度比の電子密度依存性2020

    • Author(s)
      河野泰隆、沼館直樹、大野望海、坂上裕之、加藤太治、村上泉、原弘久、中村信行
    • Organizer
      原子分子データ応用フォーラムセミナー
    • Related Report
      2020 Annual Research Report
  • [Remarks] 中村信行研究室ホームページ

    • URL

      http://yebisu.ils.uec.ac.jp/nakamura/index.html

    • Related Report
      2022 Annual Research Report
  • [Remarks] 研究室ホームページ

    • URL

      http://yebisu.ils.uec.ac.jp/nakamura/

    • Related Report
      2021 Annual Research Report

URL: 

Published: 2019-04-18   Modified: 2024-01-30  

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