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Physical Mechanism of Self-Organization in Magnetospheric Plasmas: Focusing on Heat and Particle Transport

Research Project

Project/Area Number 18K13525
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 14020:Nuclear fusion-related
Research InstitutionNational Institute for Fusion Science (2020-2022)
The University of Tokyo (2018-2019)

Principal Investigator

Kenmochi Naoki  核融合科学研究所, ヘリカル研究部, 助教 (80781319)

Project Period (FY) 2018-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2020: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2019: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2018: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords磁気圏型プラズマ / 自己組織化 / 熱・粒子輸送 / 核融合 / トムソン散乱計測 / 深層学習
Outline of Final Research Achievements

The purpose of this study is to clarify the thermal and particle characteristics of spontaneously formed high-beta plasma using the RT-1 device in order to investigate the mechanism of spontaneous confinement of high-beta plasma in the celestial magnetosphere. This study provides two new findings on the mechanism of inward diffusion as follows. (i) Detailed visualization of the peaked density profiles spontaneously formed by inward diffusion was achieved by the detailed measurement and analysis method developed in this study. (ii) We found that low-frequency fluctuations are excited when the peaked density profile is reconstructed by neutral gas injection during the discharge, and detailed measurements of the spatiotemporal structure of the fluctuations suggest that the mechanism of inward diffusion is related to drift wave instability.

Academic Significance and Societal Importance of the Research Achievements

本論文で明らかにした密度分布の自己調整機構は、定常閉じ込め系に共通する長寿命構造の基礎物理における知見を与えることができる。トカマク等の磁場配位とは異なる新概念核融合装置の研究としてはもとより、将来の核融合装置に共通の物理工学課題も含んでおり、高性能な高ベータプラズマ生成とプラズマ閉じ込め物理研究の進展が期待できる。

Report

(6 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (35 results)

All 2023 2022 2021 2020 2019 2018 Other

All Int'l Joint Research (1 results) Journal Article (12 results) (of which Int'l Joint Research: 4 results,  Peer Reviewed: 12 results,  Open Access: 7 results) Presentation (20 results) (of which Int'l Joint Research: 12 results,  Invited: 6 results) Remarks (2 results)

  • [Int'l Joint Research] ウィスコンシン大学(米国)

    • Related Report
      2022 Annual Research Report
  • [Journal Article] Absorption Analysis of Electron Cyclotron Waves in the Magnetospheric Plasma Device RT-12022

    • Author(s)
      MORI Takahiro、NISHIURA Masaki、KENMOCHI Naoki、Ueda Kenji、Nakazawa Takuya、Yoshida Zensho
    • Journal Title

      Plasma and Fusion Research

      Volume: 17 Issue: 0 Pages: 2405090-2405090

    • DOI

      10.1585/pfr.17.2405090

    • ISSN
      1880-6821
    • Year and Date
      2022-08-24
    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Preceding propagation of turbulence pulses at avalanche events in a magnetically confined plasma2022

    • Author(s)
      Kenmochi N.、Ida K.、Tokuzawa T.、Yasuhara R.、Funaba H.、Uehara H.、Den Hartog D. J.、Yamada I.、Yoshinuma M.、Takemura Y.、Igami H.
    • Journal Title

      Scientific Reports

      Volume: 12 Issue: 1 Pages: 6979-6979

    • DOI

      10.1038/s41598-022-10499-z

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Collective Thomson scattering diagnostic with in situ calibration system for velocity space analysis in large helical device2022

    • Author(s)
      Nishiura Masaki、Adachi Shun、Tanaka Kenji、Kubo Shin、Kenmochi Naoki、Shimozuma Takashi、Yanai Ryoma、Saito Teruo、Nuga Hideo、Seki Ryosuke
    • Journal Title

      Review of Scientific Instruments

      Volume: 93 Issue: 5 Pages: 053501-053501

    • DOI

      10.1063/5.0079296

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Inward diffusion driven by low frequency fluctuations in self-organizing magnetospheric plasma2022

    • Author(s)
      Kenmochi N.、Yokota Y.、Nishiura M.、Saitoh H.、Sato N.、Nakamura K.、Mori T.、Ueda K.、Yoshida Z.
    • Journal Title

      Nuclear Fusion

      Volume: 62 Issue: 2 Pages: 026041-026041

    • DOI

      10.1088/1741-4326/ac412c

    • NAID

      120007183005

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Calibration of coherence imaging spectroscopy using spectral line sources2021

    • Author(s)
      Ueda Kenji、Nishiura Masaki、Kenmochi Naoki、Yoshida Zensho、Nakamura Kaori
    • Journal Title

      Review of Scientific Instruments

      Volume: 92 Issue: 7 Pages: 073501-073501

    • DOI

      10.1063/5.0043875

    • NAID

      120007180074

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Reformation of the Electron Internal Transport Barrier with the Appearance of a Magnetic Island2020

    • Author(s)
      Kenmochi N.、Minami T.、Mizuuchi T.、Takahashi C.、Weir G. M.、Nishioka K.、Kobayashi S.、Nakamura Y.、Okada H.、Kado S.、Yamamoto S.、Ohshima S.、Konoshima S.、Ohtani Y.、Nagasaki K.
    • Journal Title

      Scientific Reports

      Volume: 10 Issue: 1 Pages: 5-5

    • DOI

      10.1038/s41598-019-56492-x

    • NAID

      120006777053

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Collective Thomson scattering with 77, 154, and 300 GHz sources in LHD2020

    • Author(s)
      Nishiura M.、Tanaka K.、Kubo S.、Saito T.、Kenmochi N.、Nuga H.、Seki R.、Shimozuma T.、Yoshimura Y.、Igami H.、Takahashi H.、Tsujimura T.I.、Yanai R.、Tatematsu Y.
    • Journal Title

      Journal of Instrumentation

      Volume: 15 Issue: 01 Pages: C01002-C01002

    • DOI

      10.1088/1748-0221/15/01/c01002

    • NAID

      120007180034

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Tomographic Reconstruction of Imaging Diagnostics with a Generative Adversarial Network2019

    • Author(s)
      KENMOCHI Naoki、NISHIURA Masaki、NAKAMURA Kaori、YOSHIDA Zensho
    • Journal Title

      Plasma and Fusion Research

      Volume: 14 Issue: 0 Pages: 1202117-1202117

    • DOI

      10.1585/pfr.14.1202117

    • NAID

      130007695048

    • ISSN
      1880-6821
    • Year and Date
      2019-07-30
    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Simulation of Electromagnetic Wave Propagation in a Magnetospheric Plasma2019

    • Author(s)
      MORI Takahiro、NISHIURA Masaki、YOSHIDA Zensho、KENMOCHI Naoki、KATSURA Shotaro、NAKAMURA Kaori、YOKOTA Yuuki、TSUJIMURA Toru I.、KUBO Shin
    • Journal Title

      Plasma and Fusion Research

      Volume: 14 Issue: 0 Pages: 3401134-3401134

    • DOI

      10.1585/pfr.14.3401134

    • NAID

      130007704082

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Experimental analysis of self-organized structure and transport on the magnetospheric plasma device RT-12019

    • Author(s)
      Nishiura M.、Yoshida Z.、Kenmochi N.、Sugata T.、Nakamura K.、Mori T.、Katsura S.、Shirahata K.、Howard J.
    • Journal Title

      Nuclear Fusion

      Volume: 59 Issue: 9 Pages: 096005-096005

    • DOI

      10.1088/1741-4326/ab259a

    • NAID

      120007176949

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Nd:YAG laser Thomson scattering diagnostics for a laboratory magnetosphere2018

    • Author(s)
      Kenmochi N.、Nishiura M.、Yoshida Z.、Yamada I.、Funaba H.、Sugata T.、Nakamura K.、Katsura S.
    • Journal Title

      Review of Scientific Instruments

      Volume: 89 Issue: 10

    • DOI

      10.1063/1.5037473

    • NAID

      120007180076

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] Coherence-imaging spectroscopy for 2D distribution of ion temperature and flow velocity in a laboratory magnetosphere2018

    • Author(s)
      Nakamura K.、Nishiura M.、Takahashi N.、Yoshida Z.、Kenmochi N.、Sugata T.、Katsura S.、Howard J.
    • Journal Title

      Review of Scientific Instruments

      Volume: 89 Issue: 10

    • DOI

      10.1063/1.5037124

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] 磁場閉じ込めプラズマの非局所輸送に関する実験的研究2023

    • Author(s)
      釼持尚輝
    • Organizer
      日本物理学会 2023年春季大会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] 敵対的生成ネットワークを用いた プラズマ加熱制御のための エッジAIシステムの開発2022

    • Author(s)
      釼持尚輝, 辻村亨, 水野嘉識, 舟場久芳, 安原亮, 山田一博, 上原日和, 吉村泰夫, 西浦正樹, 伊神弘恵, 高橋裕己, 矢内亮馬
    • Organizer
      第39回プラズマ・核融合学会年会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Preceding propagation of turbulence pulses at heat avalanche events2022

    • Author(s)
      N. Kenmochi, K. Ida, T. Tokuzawa, R. Yasuhara, H. Funaba, H. Uehara, D. J Den Hartog, I. Yamada, M. Yoshinuma, H. Igami
    • Organizer
      64th Annual Meeting of the APS Division of Plasma Physics
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Propagation characteristics of preceding turbulence pulses at avalanche events2022

    • Author(s)
      N. Kenmochi, K. Ida, T. Tokuzawa, R. Yasuhara, H. Funaba, H. Uehara, D. J, Den Hartog, I. Yamada, M. Yoshinuma, H. Igami
    • Organizer
      6th Asia-Pacific Conference on Plasma Physics
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 熱雪崩現象において先行伝搬する乱流パルスの特性2022

    • Author(s)
      釼持尚輝, 居田克巳, 徳澤季彦, 安原 亮, 舟場久芳, 上原日和, D. J. Den Hartog, 山田一博, 吉沼幹朗, 武村勇輝, 伊神弘恵
    • Organizer
      第14回核融合エネルギー連合講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Application of Generative Adversarial Networks for Plasma Diagnostics and Heating Control System2021

    • Author(s)
      N. Kenmochi , M. Nishiura , Z. Yoshida , H. Nuga , T.I. Tsujimura , Y. Mizuno
    • Organizer
      The 30th International Toki Conference on Plasma and Fusion Research
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Inward Diffusion Driven by Low Frequency Fluctuations in Self-Organizing Magnetospheric Plasma2021

    • Author(s)
      N. Kenmochi , Y. Yokota , M. Nishiura , H. Saitoh , N. Sato , K. Nakamura , T. Mori , K. Ueda , Z. Yoshida
    • Organizer
      28th IAEA Fusion Energy Conference
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] 磁気圏型プラズマの自己組織化における 低周波揺動が駆動する内向き拡散の実験解析2020

    • Author(s)
      釼持尚輝, 横田侑己, 西浦正樹, 齋藤晴彦, 佐藤直木, 森敬洋, 上田研二, 吉田善章
    • Organizer
      第37回プラズマ・核融合学会年会
    • Related Report
      2020 Research-status Report
  • [Presentation] 敵対的生成ネットワークを用いた プラズマ計測・加熱制御手法の開発2020

    • Author(s)
      釼持尚輝, 西浦正樹, 吉田善章, 辻村亨, LHD実験グループ
    • Organizer
      第37回プラズマ・核融合学会年会
    • Related Report
      2020 Research-status Report
  • [Presentation] Generative adversarial networks for plasma diagnostics and heating control2020

    • Author(s)
      Naoki KENMOCHI, Masaki NISHIURA, Toru Ii TSUJIMURA, the LHD Experimental Group, the RT-1 Experimental Group
    • Organizer
      The 29th International Toki Conference on Plasma and Fusion Research
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] 深層敵対的生成ネットワークを用いた線積分型イメージング計測における局所分布再構成2019

    • Author(s)
      釼持尚輝, 西浦正樹, 中村香織, 上田研二, 吉田善章
    • Organizer
      第36回 プラズマ・核融合学会 年会
    • Related Report
      2019 Research-status Report
  • [Presentation] Deep learning for tomographic reconstruction of imaging diagnostics2019

    • Author(s)
      N. Kenmochi, M. Nishiura, K. Nakamura, K. Ueda, Z. Yoshida
    • Organizer
      3rd Asia-Pacific Conference on Plasma Physics
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Characteristics of uphill diffusion with low frequency fluctuation in dipole magnetic field2019

    • Author(s)
      N. Kenmochi, Y. Yokota, M. Nishiura, H. Saitoh, K. Nakamura, T. Mori, Z. Yoshida
    • Organizer
      46th European Physical Society Conference on Plasma Physics
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Collective Thomson scattering with 77, 154, and 300 GHz sources in LHD2019

    • Author(s)
      M. Nishiura, K. Tanaka, S. Kubo, T. Saito, N. Kenmochi, H. Nuga, R. Seki, T. Shimozuma, Y. Yoshimura, H. Igami, H. Takahashi, T. I. Tsujimura, R. Yanai, Y. Tatematsu, LHD experiment group
    • Organizer
      Laser Aided Plasma Diagnostics 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] ダイポール磁場中の粒子のアップヒル拡散と揺動特性2018

    • Author(s)
      釼持尚輝,西浦正樹,吉田善章,桂将太郎,中村香織,森敬洋,横田侑己
    • Organizer
      第35回プラズマ・核融合学会年会
    • Related Report
      2018 Research-status Report
  • [Presentation] Uphill Diffusion with Low Frequency Fluctuation in Dipole Magnetic Field2018

    • Author(s)
      Naoki Kenmochi. Masaki Nishiura, Zensho Yoshida, Tetsuya Sugata, Shotaro Katsura, Kaori Nakamura, Takahiro Mori, Yuuki Yokota
    • Organizer
      The 27th International Toki Conference on Plasma and Fusion Research & The 13th Asia Pacific Plasma Theory Conference
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] ダイポール磁場中の密度揺動と粒子の内向き拡散特性2018

    • Author(s)
      釼持尚輝,西浦正樹,吉田善章,管田徹也,桂将太郎,中村香織
    • Organizer
      第12回核融合エネルギー連合講演会
    • Related Report
      2018 Research-status Report
  • [Presentation] Nd:YAG laser Thomson scattering diagnostics for laboratory magnetosphere2018

    • Author(s)
      N. Kenmochi, M. Nishiura, Z. Yoshida, I. Yamada, H. Funaba, T. Sugata, K. Nakamura, and S. Katsura
    • Organizer
      High Temperature Plasma Diagnostics Conference
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Experimental approach for understanding self-organized plasma transport in laboratory magnetosphere RT-12018

    • Author(s)
      M. Nishiura, Z. Yoshida, N. Kenmochi, T. Sugata, K. Nakamura, S. Katsura, K. Shirahata, Y. Yokota, T. Mori, C. Michael, J. Howard
    • Organizer
      2nd Asia-Pacific Conference on Plasma Physics
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Progress in the Dipole Plasma Experiment RT-12018

    • Author(s)
      M. Nishiura, Z. Yoshida, N. Kenmochi, T. Sugata, K. Nakamura, S. Katsura, C. Michael, J. Howard
    • Organizer
      19th International Congress on Plasma Physics
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited
  • [Remarks] Researchmap

    • URL

      https://researchmap.jp/nkenmochi/

    • Related Report
      2022 Annual Research Report 2021 Research-status Report 2020 Research-status Report 2019 Research-status Report 2018 Research-status Report
  • [Remarks] プラズマ理工学講座ホームページ

    • URL

      http://www.ppl.k.u-tokyo.ac.jp/index.html

    • Related Report
      2021 Research-status Report 2020 Research-status Report 2019 Research-status Report 2018 Research-status Report

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Published: 2018-04-23   Modified: 2024-01-30  

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