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Clarification of plasma evolution on new electrode configuration

Research Project

Project/Area Number 19K14685
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 14020:Nuclear fusion-related
Research InstitutionKyushu University

Principal Investigator

Kuroda Kengoh  九州大学, 応用力学研究所, 学術研究員 (40795035)

Project Period (FY) 2019-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2022: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2021: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2020: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2019: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Keywords球状トカマク / プラズマ立ち上げ / 核融合発電 / 非誘導電流駆動 / CHI / 電流駆動手法 / 磁場閉じ込め / 駆動電流増倍率の向上 / 閉じ込めの効率改善 / 真空容器内コイルの評価 / プラズマ / CHI電流駆動 / リコネクション / コイルコイル設計
Outline of Research at the Start

核融合発電実現のためのプラズマ実験装置QUEST(九州大学)では近年、装置への導入を容易にする新設計電極を用いた同軸ヘリシティ入射(CHI)システムのプラズマの立ち上げ評価実験が行われている。このCHI手法による初期形成プラズマに電子サイクロトロン加熱を重畳することで高効率のプラズマ閉じ込めが期待される。本研究ではCHIによるプラズマ発展過程を理論的に明らかにすることにより高精度な数値予想を可能とし、電極形状及びコイル配置を変更した最適配位におけるCHIプラズマの形成を評価する。

Outline of Final Research Achievements

In this project, we researched CHI plasma start-up on the largest spherical tokamak device in Japan, QUEST. In CHI, the current is injected into the plasma from a circular electrode in a vacuum vessel, and the plasma evolves and confinement flux configuration is formed. The first achievement was the theoretical elucidation of relation between the injector current and plasma evolution. As a second result, the prototype electrode was redesigned based on the elucidated theory and modified as a permanent electrode, and the expected performance was obtained.

Academic Significance and Societal Importance of the Research Achievements

将来の核融合発電炉に球状トカマク型の炉が適用出来れば建設コストの大幅な削減が見積もられ、その為の有効なプラズマ立ち上げ手法の研究がQUESTで実施されている。本件ではCHI手法の新たな理論的知見が得られ、QUESTへの導入実績は様々な装置への展開による更なる研究の発展を示唆する。今後QUESTでは新たに導入された本手法を活用してRF加熱などの他の手法と組み合わせることで様々な立ち上げシナリオの検討と評価が行われる。

Report

(5 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (14 results)

All 2022 2021 2020 2019 Other

All Int'l Joint Research (3 results) Journal Article (2 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 2 results,  Open Access: 1 results) Presentation (9 results) (of which Int'l Joint Research: 5 results)

  • [Int'l Joint Research] University of Washington/Princeton Plasma Physics Laboratory(米国)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] University of Washington/Princeton Plasma Physics Laboratory(米国)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] University of Washington/Princeton Plasma Physics Laboratory(米国)

    • Related Report
      2020 Research-status Report
  • [Journal Article] Improvements to the High-Field-Side Transient CHI System on QUEST2022

    • Author(s)
      Kuroda K.、Raman R.、Hasegawa M.、Onchi T.、Hanada K.、Ono M.、Nelson B. A.、Rogers J.、Ikezoe R.、Idei H.、Ido T.、Mitarai O.、Nagata M.、Kawasaki S.、Nagata T.、Higashijima A.、Shimabukuro S.、Niiya I.、Sekiya I.、Kojima S.、Nakamura K.、Takase Y.、Murakami S.
    • Journal Title

      Journal of Fusion Energy

      Volume: 41 Issue: 2

    • DOI

      10.1007/s10894-022-00338-4

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Initial Results from High-Field-Side Transient CHI Start-Up on QUEST2021

    • Author(s)
      Kengoh KURODA, Roger RAMAN et al.
    • Journal Title

      Plasma and Fusion Research

      Volume: 16 Issue: 0 Pages: 2402048-2402048

    • DOI

      10.1585/pfr.16.2402048

    • NAID

      130008033380

    • ISSN
      1880-6821
    • Year and Date
      2021-04-09
    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] QUESTにおけるトランジエントCHI改善電極の初期評価2022

    • Author(s)
      黒田 賢剛, Roger Raman, 他
    • Organizer
      第39回プラズマ・核融合学会年会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Improvements to the High-Field-Side Transient CHI System on QUEST2022

    • Author(s)
      Kengoh KURODA, Roger RAMAN et al.
    • Organizer
      The 21st International Spherical Torus Workshop
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] QUESTにおけるT-CHIプラズマの発展磁束の解析2022

    • Author(s)
      黒田 賢剛, Roger Raman, 他
    • Organizer
      日本物理学会 第77回年次大会
    • Related Report
      2021 Research-status Report
  • [Presentation] QUESTにおけるトランジエントCHIシステムの設計改善2021

    • Author(s)
      黒田 賢剛, Roger Raman, 他
    • Organizer
      第38回プラズマ・核融合学会年会
    • Related Report
      2021 Research-status Report
  • [Presentation] Initial results from high-field-side Transient CHI start-up on QUEST2020

    • Author(s)
      Kengoh KURODA, Roger RAMAN et al.
    • Organizer
      The 29th International Toki Conference on Plasma and Fusion Research
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] CHI Experiment in QUEST2020

    • Author(s)
      Kengoh KURODA, Roger RAMAN, Makoto HASEGAWA, Takumi ONCHI, Osamu MITARAI, Kazuaki HANADA, Masayuki ONO, et al.
    • Organizer
      8th RF Workshop
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] T-CHI current start up by a simple configuration electrode in QUEST2019

    • Author(s)
      Kengoh KURODA, Roger RAMAN, Makoto HASEGAWA, Takumi ONCHI, Osamu MITARAI, Kazuaki HANADA, Masayuki ONO, et al.
    • Organizer
      20th International Spherical Torus Workshop
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Transient CHI start-up of low inductance plasma for advanced ST scenarios2019

    • Author(s)
      R. Raman, F. Ebrahimi, S.C. Jardin, K. Kuroda
    • Organizer
      20th International Spherical Torus Workshop
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] ダイバーター電極配位における内側壁放電でのCHI生成電流の発展2019

    • Author(s)
      黒田賢剛, Roger RAMAN, 長谷川真, 恩地拓己, 御手洗修, 花田和明, 小野雅之, 他
    • Organizer
      プラズマ・核融合学会 第 36 回年会
    • Related Report
      2019 Research-status Report

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

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