• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Research of two dimensional structure formation of radial electric field and turbulence transport with improved high accuracy Heavy Ion Beam Probe

Research Project

Project/Area Number 16K06946
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Nuclear fusion studies
Research InstitutionNational Institute for Fusion Science

Principal Investigator

SHIMIZU AKIHIRO  核融合科学研究所, ヘリカル研究部, 助教 (00390633)

Research Collaborator IDO TAKECHI  核融合科学研究所, 高温プラズマ物理研究系, 准教授
FUJISAWA AKIHIDE  九州大学, 応用力学研究所, 教授
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2018: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2016: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Keywords電場構造 / 二次元構造 / 乱流揺動 / 乱流輸送 / 重イオンビームプローブ / ヘリカル / 大型ヘリカル装置 / 二次元計測 / 揺動計測 / 負イオン源 / プラズマ乱流 / 電位 / 層状流 / 電位計測 / 電場計測 / ヘリカル磁場閉じ込め / 構造形成
Outline of Final Research Achievements

The purpose of this research is two-dimensional measurement of potential and density fluctuation with good accuracy by heavy ion beam probe in the Large Helical Device. At first, in order to improve S/N ratio, we improved the negative ion source to extract negative ion beam of Ag. However, we were not able to obtain sufficient probe beam current of Ag as expected. Therefore, we designed and made a new negative ion source to increase the negative ion current. Now, we are testing it in the test stand device. As for two-dimensional measurement of potential and density fluctuation, we used the existing negative ion source. Two-dimensional fluctuation structure of 200 kHz Alfven mode and geodesic acoustic mode driven by energetic particle were successfully measured by HIBP.

Academic Significance and Societal Importance of the Research Achievements

LHDにおいて、HIBPにより電位・密度揺動を同時に二次元で計測できることを証明し、物理研究へ適用すれば非常に有用であることを示した。層状流の一種である測地線音響モードの二次元構造の計測に成功し、密度揺動についてm=1の構造だけではなく、m=0の構造への変化も示唆されるデータを取得した。S/N比をもう少し向上できれば、乱流と層状流について更に踏み込んだ研究が実施でき、異常輸送の解明への可能性につなげられることを見出した。

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (7 results)

All 2019 2018 2017 2016

All Journal Article (3 results) (of which Peer Reviewed: 3 results,  Acknowledgement Compliant: 2 results,  Open Access: 1 results) Presentation (4 results) (of which Int'l Joint Research: 2 results,  Invited: 1 results)

  • [Journal Article] Density profile measurement with a heavy ion beam probe in a toroidal plasma of the compact helical system2018

    • Author(s)
      A. Shimizu, A. Fujisawa, S. Ohshima, H. Nakano, T. Minami, M. Isobe, S. Okamura, K. Matsuoka
    • Journal Title

      Review of scientific instruments

      Volume: 89 Issue: 11 Pages: 113507-113507

    • DOI

      10.1063/1.5039571

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 2D spatial profile measurements of potential fluctuation with heavy ion beam probe on the Large Helical Device2016

    • Author(s)
      A. Shimizu, T. Ido, M. Nishiura, S. Kato, K. Ogawa, H. Takahashi, H. Igami, Y. Yoshimura, S. Kubo, T. Shimozuma
    • Journal Title

      Review of Scientific Instruments

      Volume: 87 Issue: 11

    • DOI

      10.1063/1.4963908

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Development of 2D Potential Profile Measurements Using the Heavy Ion Beam Probe on the Large Helical Device2016

    • Author(s)
      A. Shimizu, T. Ido, M. Nishiura, H. Takahashi, H. Igami, Y. Yoshimura, S. Kubo, T. Shimozuma, S. Kato, M. Yokoyama
    • Journal Title

      Plasma and Fusion Research

      Volume: 11 Issue: 0 Pages: 2402123-2402123

    • DOI

      10.1585/pfr.11.2402123

    • NAID

      130005395309

    • ISSN
      1880-6821
    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Presentation] LHDにおける高速イオン励起測地線音波の2次元構造の観測2019

    • Author(s)
      井戸毅、一ノ瀬薫、清水昭博、佐々木真
    • Organizer
      日本物理学会第74回年会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Energetic particle-driven Geodesic Acoustic Mode in the Large Helical Device2017

    • Author(s)
      Takeshi Ido, Akihiro Shimizu, Masaki Osakabe, Kimitaka Itoh, Maxime Lesur, Kunihiro Ogawa, Masaki Nishiura, Yusuke Kosuga, Makoto Sasaki, Katsumi Ida, Shigeru Inagaki, Sanae -I. Itoh, and the LHD Experiment Group
    • Organizer
      1st Asia-Pacific Conference on Plasma Physics
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] LHDにおけるHIBPの密度搖動計測の経路積分効果2016

    • Author(s)
      清水昭博、井戸毅、中野治久、西浦正樹、加藤眞治
    • Organizer
      プラズマ核融合学会
    • Place of Presentation
      東北大学青葉山キャンパス
    • Year and Date
      2016-11-29
    • Related Report
      2016 Research-status Report
  • [Presentation] 2D spatial profile measurements of potential and density fluctuation with Heavy Ion Beam Probe on the Large Helical Device2016

    • Author(s)
      A. Shimizu, T. Ido, M. Nishiura, S. Kato
    • Organizer
      21st Topical Conference on High-Temperature Plasma Diagnostics
    • Place of Presentation
      Monona Terrace, Madison, Wisconsin
    • Year and Date
      2016-06-05
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research

URL: 

Published: 2016-04-21   Modified: 2020-03-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi