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Effect of Alfven velocity on energetic ion transport due to wave-particle interaction

Research Project

Project/Area Number 19K03798
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 14020:Nuclear fusion-related
Research InstitutionNational Institute for Fusion Science

Principal Investigator

Ogawa Kunihiro  核融合科学研究所, ヘリカル研究部, 准教授 (90632274)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2021: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2020: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2019: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords磁場閉じ込めプラズマ / 高エネルギー粒子 / 放射線計測 / 核融合プラズマ / 高エネルギー粒子閉じ込め / 中性子計測 / 重水素実験 / 中性子 / 高速イオン閉じ込め / アルヴェン固有モード
Outline of Research at the Start

磁場核融合炉の大きな問題の一つはα粒子に代表される高速イオン(EP)が引き起こすアルヴェン固有モード(AE)によりEP自身が損失することである。核融合炉のα粒子ではキーパラメータであるEPの速度(VEP)/アルヴェン速度(VA)が1より大きく、EPの輸送(損失)時間が短くなりEP損失による炉壁への熱負荷のピーク値が大きくなる可能性がある。LHDでは磁場を下げるとVEP/VAが1より大きい領域までカバーできることがわかった。現行のEP計測の時間分解能を向上させるべく、サイズの大きなシンチレータを用いて高時間分解能の検出システムを開発する。

Outline of Final Research Achievements

In deuterium plasma experiments, measurements of the total neutron emission rate and the neutron emission profile can provide information on the confinement of energetic particles inside the plasma.
A fast-response neutron detector is newly developed and used with the existing spatial distribution of Alven eigenmodes and escaping energetic ion diagnostic. Simultaneous measurements of the spatial distribution of Alven eigenmodes, escaping energetic ion flux, and the fast-response neutron detector were carried out in discharges with different Alven speeds to study the effect of Alven eigenmodes on energetic particle confinement.

Academic Significance and Societal Importance of the Research Achievements

本研究で得られる結果は、国際熱核融合実験炉におけるアルファ粒子による第一壁への熱負荷のピーク値の予測にとって有用である。近年、トカマクにおいても、共鳴摂動磁場の印加等による3次元磁場構造でのアルヴェン固有モード並びにその高エネルギー粒子閉じ込めへの影響が注目されているため、3次元である大型ヘリカルの成果は有用である。また、天体プラズマにおいても、2015年に「ひので」と「IRIS」衛星の共同によってアルヴェン波が観測されアルヴェン波によるコロナ加熱問題解明が進められており、アルヴェン波との相互作用という観点では上記問題の解明に貢献できる可能性がある。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (23 results)

All 2022 2021 2020 2019 Other

All Int'l Joint Research (8 results) Journal Article (6 results) (of which Int'l Joint Research: 6 results,  Peer Reviewed: 6 results,  Open Access: 2 results) Presentation (8 results) (of which Int'l Joint Research: 5 results,  Invited: 3 results) Remarks (1 results)

  • [Int'l Joint Research] Institute of Plasma Physics(中国)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] Korea Institute of Fusion Energy(韓国)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] Max Planck Institute for Plasma Physics(ドイツ)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] Oak Ridge National Laboratory(米国)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] Korea Institute of Fusion Energy(韓国)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] Oak Ridge National Laboratory(米国)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] OAK RIDGE National Laboratory(米国)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] 北京大学(中国)

    • Related Report
      2019 Research-status Report
  • [Journal Article] Evaluation of Alpha Particle Emission Rate Due to the p-<sup>11</sup>B Fusion Reaction in the Large Helical Device2022

    • Author(s)
      Ogawa K.、Isobe M.、Nuga H.、Seki R.、Ohdachi S.、Osakabe M.
    • Journal Title

      Fusion Science and Technology

      Volume: 78 Issue: 3 Pages: 175-185

    • DOI

      10.1080/15361055.2021.1973294

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Progress on Integrated Neutron Diagnostics for Deuterium Plasma Experiments and Energetic Particle Confinement Studies in the Large Helical Device During the Campaigns from FY2017 to FY20192021

    • Author(s)
      Kunihiro Ogawa, Mitsutaka Isobe, and Masaki Osakabe
    • Journal Title

      Plasma and Fusion Research

      Volume: 16 Issue: 0 Pages: 1102023-1102023

    • DOI

      10.1585/pfr.16.1102023

    • NAID

      130008022663

    • ISSN
      1880-6821
    • Year and Date
      2021-03-12
    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] A study of beam ion and deuterium?deuterium fusion-born triton transports due to energetic particle-driven magnetohydrodynamic instability in the large helical device deuterium plasmas2021

    • Author(s)
      Ogawa K.、Isobe M.、Nuga H.、Kamio S.、Fujiwara Y.、Kobayashi M.I.、Sangaroon S.、Takada E.、Seki R.、Yamaguchi H.、Murakami S.、Jo J.、Osakabe M.
    • Journal Title

      Nuclear Fusion

      Volume: 61 Issue: 9 Pages: 096035-096035

    • DOI

      10.1088/1741-4326/ac0d8a

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Time-resolved secondary triton burnup 14 MeV neutron measurement by a new scintillating fiber detector in middle total neutron emission ranges in deuterium large helical device plasma experiments2021

    • Author(s)
      Ogawa K.、Isobe M.、Sangaroon S.、Takada E.、Nakada T.、Murakami S.、Jo J.、Zhong G. Q.、Zhang Yipo、Tamaki S.、Murata I.
    • Journal Title

      AAPPS Bulletin

      Volume: 31 Issue: 1 Pages: 1-9

    • DOI

      10.1007/s43673-021-00023-2

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Characteristics of neutron emission profile from neutral beam heated plasmas of the Large Helical Device at various magnetic field strengths2021

    • Author(s)
      Ogawa K、Isobe M、Sugiyama S、Spong D A、Sangaroon S、Seki R、Nuga H、Yamaguchi H、Kamio S、Fujiwara Y、Kobayashi M I、Jo J、Osakabe M
    • Journal Title

      Plasma Physics and Controlled Fusion

      Volume: 63 Issue: 6 Pages: 065010-065010

    • DOI

      10.1088/1361-6587/abf575

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Energetic particle transport and loss induced by helically-trapped energetic-ion-driven resistive interchange modes in the Large Helical Device2020

    • Author(s)
      30.K. Ogawa, M. Isobe, S. Sugiyama, H. Matsuura, D. A. Spong, H. Nuga, R. Seki, S. Kamio, Y. Fujiwara, H. Yamaguchi, M. Osakabe, and LHD Experiment Group
    • Journal Title

      Nuclear Fusion

      Volume: 60 Issue: 11 Pages: 112011-112011

    • DOI

      10.1088/1741-4326/ab6da0

    • Related Report
      2020 Research-status Report 2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] A Comprehensive Study of Energetic Particle Transport Due to Energetic Particle Driven MHD Instabilities in LHD Deuterium Plasmas2021

    • Author(s)
      K. Ogawa, M. Isobe, S. Kamio, Y. Fujiwara, S. Sangaroon, R. Seki, H. Nuga, H. Yamaguchi, M. I. Kobayashi, and M. Osakabe
    • Organizer
      The 28th IAEA Fusion Energy Conference (FEC 2020), Online, 10-15 May 2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Energetic Ion Transport due to Energetic Particle Continuum Mode in Deuterium LHD Plasmas2021

    • Author(s)
      K. Ogawa, M. Isobe, S. Kamio, H. Nuga, R. Seki, S. Sangaroon, H. Yamaguchi, Y. Fujiwara, E. Takada, S. Murakami, J. Jo, and M. Osakabe
    • Organizer
      17th IAEA Technical Meeting on Energetic Particles and Theory of Plasma Instabilities in Magnetic Confinement Fusion
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Evaluation of alpha particle emission rate due to p-11B fusion reaction in the Large Helical Device2021

    • Author(s)
      K. Ogawa, M. Isobe, H. Nuga, R. Seki, S. Ohdachi, and M. Osakabe
    • Organizer
      IEEE Pulsed Power Conference & Symposium on Fusion Engineering
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Energetic Particle Confinement Study Using Integrated Neutron Diagnostics in the Large Helical Device Deuterium Plasmas2021

    • Author(s)
      Kunihiro Ogawa, Mitsutaka Isobe, Siriyaporn Sangaroon, Hideo Nuga, Ryosuke Seki, Shuji Kamio, Eiji Takada, and Masaki Osakabe
    • Organizer
      International Conference on Frontiers of Physics -2022 (ICFP-2022) Kathmandu Nepal
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 大型ヘリカル装置における高エネルギーイオン励起不安定性による高エネルギーイオン輸送の研究2021

    • Author(s)
      7.K. Ogawa, M. Isobe, S. Sangaroon, D. A. Spong, H. Matsuura, H. Nuga, R. Seki, S. Kamio, Y. Fujiwara, H. Yamaguchi, M. I. Kobayashi, J. Jo, and M. Osakabe
    • Organizer
      日本物理学会第76回年次大会
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] 大型ヘリカル装置の重水素実験における中性子計測と高エネルギー粒子閉じ込め研究の進展2020

    • Author(s)
      6.小川国大、磯部光孝、長壁正樹
    • Organizer
      第37回プラズマ・核融合学会年会
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] Energetic Particle Transport and Loss Induced by Helically-trapped Energetic-ion-driven Resistive Interchange Mode in the Large Helical Device2019

    • Author(s)
      Kunihiro Ogawa
    • Organizer
      16th Technical Meeting on Energetic Particles in Magnetic Confinement Systems - Theory of Plasma Instabilities
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Development of Neutron Energy Spectrometer in Large Helical Device2019

    • Author(s)
      小川国大
    • Organizer
      プラズマ・核融合学会
    • Related Report
      2019 Research-status Report
  • [Remarks] 研究者ページ

    • URL

      https://www-app.nifs.ac.jp/cgi-bin/people/member.cgi?id=ogawa_kunihiro

    • Related Report
      2019 Research-status Report

URL: 

Published: 2019-04-18   Modified: 2023-01-30  

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