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Establishment of efficient core heating by Resistive field guiding of fast electron beam in fast ignition laser fusion

Research Project

Project/Area Number 20H01886
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 14020:Nuclear fusion-related
Research InstitutionHiroshima University

Principal Investigator

Johzaki Tomoyuki  広島大学, 先進理工系科学研究科(工), 教授 (10397680)

Co-Investigator(Kenkyū-buntansha) 長友 英夫  大阪大学, レーザー科学研究所, 准教授 (10283813)
藤岡 慎介  大阪大学, レーザー科学研究所, 教授 (40372635)
Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥17,810,000 (Direct Cost: ¥13,700,000、Indirect Cost: ¥4,110,000)
Fiscal Year 2022: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2021: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2020: ¥8,190,000 (Direct Cost: ¥6,300,000、Indirect Cost: ¥1,890,000)
Keywords高速点火レーザー核融合 / レーザー加速電子ビーム / プラズマ / 抵抗性磁場 / コア加熱 / ビームガイド / 相対論電子ビーム / レーザー核融合 / 高速点火方式 / 抵抗性磁場ガイド / 高速点火
Outline of Research at the Start

高密度圧縮した燃料コアプラズマを相対論的高エネルギー電子ビーム(REB)で点火温度まで加熱する高速点火方式レーザー核融合の最大の課題は、大きな発散角を持つREBにより如何に高効率に燃料コアを加熱できるかにある。応募者らは外部印加磁場によるREBガイド方法で≧5%の加熱効率を実現した。この実績と経験を踏まえ、本課題では、将来の核融合炉に直接つながり、且つ既存の外部磁場ガイド法を上回る高効率ガイド法として、抵抗性磁場ガイド法(抵抗率の異なる物質境界に生じる磁場でREBをコアまでガイドする)をシミュレーションと実験により、確立する。

Outline of Final Research Achievements

For efficient core heating in fast ignition laser fusion, guiding of laser-accelerated electron beam to the imploded core to keep its intensity sufficiently high is indispensable. In the present study, we focused on the electron beam guiding scheme using resistive magnetic fields generated around the boundary between materials with different resistivity, i.e., resistive field guiding scheme. We evaluated the dependence of the resistive field guiding scheme on the laser intensity and duration by the numerical simulations. It was found that for a fast ignition-relevant laser condition (1e20 W/cm2 intensity and 10 ps duration), nickel works as a guiding material. The fundamental experiment using LFEX laser showed the guiding performance that was qualitatively consistent with the simulations at the low intensity, indicating the validity of the numerical evaluation. These results show the availability of resistive field guiding scheme for improving core heating efficiency.

Academic Significance and Societal Importance of the Research Achievements

本研究は、高速点火レーザー核融合の最大の課題である爆縮コア加熱効率の向上を図るための手法の確立を目的とし、比較的シンプルなターゲット構造で、レーザー加速電子ビームを爆縮コアまで誘導し、加熱の高効率化を可能とする手法の特性を明らかにした。この成果は、高速点火レーザー核融合の高効率化に貢献するもので、レーザー方式によるカーボンフリーな核融合炉の実現に貢献する点に社会的意義がある。また、本誘導法は高速点火レーザー核融合のみならず、レーザー加速電子による物質の高効率化を通して、レーザー高エネルギー密度科学全般に貢献でき、本分野の学術研究に大きな意義を持つ。

Report

(4 results)
  • 2023 Final Research Report ( PDF )
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • Research Products

    (26 results)

All 2023 2022 2021 2020 Other

All Int'l Joint Research (2 results) Journal Article (6 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 6 results,  Open Access: 5 results) Presentation (16 results) (of which Int'l Joint Research: 2 results) Remarks (2 results)

  • [Int'l Joint Research] Purdue University(米国)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] Purdue University(米国)

    • Related Report
      2020 Annual Research Report
  • [Journal Article] Effect of Kilo-Tesla Magnetic Fields on Ignition and Burn Dynamics in Fast Ignition Laser Fusion2023

    • Author(s)
      MATSUMURA Naoki、JOHZAKI Tomoyuki、KIM Wookyung、ENDO Takuma
    • Journal Title

      Plasma and Fusion Research

      Volume: 18 Issue: 0 Pages: 2404061-2404061

    • DOI

      10.1585/pfr.18.2404061

    • ISSN
      1880-6821
    • Year and Date
      2023-08-28
    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Dependence of resistivity gradient guiding of laser-driven relativistic electron beams on laser intensity and duration2022

    • Author(s)
      Johzaki T.、Yoshitake K.、Endo T.、Kim W.、Fujioka S.、Nagatomo H.、Morita H.、Takizawa R.、Takemura M.
    • Journal Title

      Physics of Plasmas

      Volume: 29 Issue: 11 Pages: 112707-112707

    • DOI

      10.1063/5.0101615

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Hot Electron and Ion Spectra in Axial and Transverse Laser Irradiation in the GXII-LFEX Direct Fast Ignition Experiment2021

    • Author(s)
      OZAKI Tetsuo、ABE Yuki、ARIKAWA Yasunobu、OKIHARA Shinichirou、MIURA Eisuke、SUNAHARA Atsushi、ISHII Katsuhiro、HANAYAMA Ryohei、KOMEDA Osamu、SENTOKU Yasuhiko、IWAMOTO Akifumi、SAKAGAMI Hitoshi、JOHZAKI Tomoyuki、et al.
    • Journal Title

      Plasma and Fusion Research

      Volume: 16 Issue: 0 Pages: 2404076-2404076

    • DOI

      10.1585/pfr.16.2404076

    • NAID

      130008053133

    • ISSN
      1880-6821
    • Year and Date
      2021-06-07
    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Enhanced relativistic electron beams intensity with self-generated resistive magnetic field2020

    • Author(s)
      Li Huan、Sakata Shohei、Johzaki Tomoyuki、Tang Xiaobin、Matsuo Kazuki、Lee Seungho、Farley Law King Fai、Arikawa Yasunobu、Ochiai Yugo、Liu Chang、Nishibata Jo、Takizawa Ryunosuke、Morita Hiroki、Azechi Hiroshi、YasuhikoSentoku、Fujioka Shinsuke
    • Journal Title

      High Energy Density Physics

      Volume: 36 Pages: 100773-100773

    • DOI

      10.1016/j.hedp.2020.100773

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Monte Carlo particle collision model for qualitative analysis of neutron energy spectra from anisotropic inertial confinement fusion2020

    • Author(s)
      Y. Abe, T. Johzaki, A. Sunahara, Y. Arikawa, T. Ozaki, K. Ishii, R. Hanayama, S. Okihara, E. Miura, O. Komeda, S. Sakata, K. Matsuo, H. Morita, R. Takizawa, R. Mizutani, A. Iwamoto, H. Sakagami, Y. Sentoku, H. Shiraga, M. Nakai, S. Fujioka, Y. Mori, Y. Kitagawa
    • Journal Title

      High Energy Density Physics

      Volume: 36 Pages: 100803-100803

    • DOI

      10.1016/j.hedp.2020.100803

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Intensification of laser-produced relativistic electron beam using converging magnetic fields for ignition in fast ignition laser fusion2020

    • Author(s)
      Johzaki Tomoyuki、Hino Masaya、Horio Mie、Takeda Shijuro、Kim Wookyung、Endo Takuma、Fujioka Shinsuke、Sentoku Yasuhiko、Nagatomo Hideo、Sunahara Atsushi
    • Journal Title

      High Energy Density Physics

      Volume: 36 Pages: 100841-100841

    • DOI

      10.1016/j.hedp.2020.100841

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] 高速点火レーザー核融合における燃焼率の爆縮燃料密度分布依存性2023

    • Author(s)
      城﨑知至、長友英夫、藤岡慎介
    • Organizer
      日本物理学会 2023春季大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Potential of Kilo-Tesla-Class Magnetic Field to Control Ignition and Burn Characteristics in Fast Ignition Laser Fusion2023

    • Author(s)
      Tomoyuki JOHZAKI, Naoki MATSUMURA, Yasuyuki KIMURA, Wookyung KIM, Takuma ENDO
    • Organizer
      International Conference on Inertial Fusion Sciences and Applications 2023
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 高速点火レーザー核融合における点火・燃焼特性の爆縮燃料状態依存性2022

    • Author(s)
      城﨑知至、長友英夫、藤岡慎介
    • Organizer
      第14回核融合エネルギー連合講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 散乱制限を考慮した縮退電子によるα粒子阻止能2022

    • Author(s)
      城﨑知至, 石田凌大, 遠藤琢磨, 金佑勁, 中尾安幸
    • Organizer
      日本物理学会 2022年秋季大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Effect of kilo-tesla magnetic field on ignition and burn dynamics in fast ignition laser fusion2022

    • Author(s)
      Naoki MATSUMURA, Tomoyuki JOHZAKI, Wookyug KIM, Takuma ENDO
    • Organizer
      The 31st International Toki Conference on Plasma and Fusion Research
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 超高コントラストレーザーによる核融合プラズマの加熱2022

    • Author(s)
      瀧澤龍之介
    • Organizer
      日本物理学会第77回年次大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 抵抗性磁場ガイドによる爆縮コア加熱の高効率化2022

    • Author(s)
      城﨑知至
    • Organizer
      日本物理学会第77回年次大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 中心点火レーザー核融合における磁場による電熱伝導抑制効果2021

    • Author(s)
      松村尚紀
    • Organizer
      第38回プラズマ・核融合学会年会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 抵抗性磁場ガイドによる爆縮コア加熱の高効率化2021

    • Author(s)
      城﨑知至
    • Organizer
      第38回プラズマ・核融合学会年会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 高速点火用金コーン付ターゲットの多段パルスによる密度圧縮2021

    • Author(s)
      長友英夫
    • Organizer
      第38回プラズマ・核融合学会年会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 磁場ガイド高速点火レーザー核融合の点火要件2021

    • Author(s)
      城﨑知至
    • Organizer
      日本物理学会2021年秋季大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] レーザー核融合高速点火実験の進展2021

    • Author(s)
      藤岡慎介、長友英夫、城崎知至 他 (総著者数32名)
    • Organizer
      日本物理学会第76回年次大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 超高コントラスト加熱ビームを用いた核融合プラズマの加熱効率2021

    • Author(s)
      瀧澤龍之介、長友英夫、城崎知至、藤岡慎介他 (総著者数19名)
    • Organizer
      日本物理学会第76回年次大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Experimental design for ion stopping power in dense plasmas2021

    • Author(s)
      A. Morace, S. Fujioka, T. Johzaki et al. (16 authors)
    • Organizer
      日本物理学会第76回年次大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 電子ビーム輸送効率向上のための抵抗性磁場ガイド法のレーザー強度・パルス長依存性評価2020

    • Author(s)
      吉武佳菜, 城崎知至, 遠藤琢磨, 金佑勁, 藤岡慎介
    • Organizer
      日本物理学会2020年秋季大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] テーパー型の自己生成磁場を用いた電子ビームの集束に関する実験2020

    • Author(s)
      嶽村真緒, 城崎知至, 藤岡慎介 他 (総著者数15名)
    • Organizer
      日本物理学会2020年秋季大会
    • Related Report
      2020 Annual Research Report
  • [Remarks]

    • URL

      https://www.rgdl.net/laserplasmasimulation

    • Related Report
      2022 Annual Research Report
  • [Remarks] Laser High Energy Density Physics simulation

    • URL

      https://www.rgdl.net/laserplasmasimulation

    • Related Report
      2021 Annual Research Report

URL: 

Published: 2020-04-28   Modified: 2025-01-30  

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