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Measurements of rotational transform profile using Motional Stark Effect spectroscopy

Research Project

Project/Area Number 15206106
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Research Field Nuclear fusion studies
Research InstitutionNational Institute for Fusion Science

Principal Investigator

IDA Katsumi  National Institute for Fusion Science, Large Helical Device Research Dep., Professor, 大型ヘリカル研究部, 教授 (00184599)

Co-Investigator(Kenkyū-buntansha) YOSHINUMA Mikirou  National Institute for Fusion Science, Large Helical Device Research Dep., Professor, 大型ヘリカル研究部, 助手 (20323058)
WATANABE Kiyomasa  National Institute for Fusion Science, Large Helical Device Research Dep., Assistant Professor, 大型ヘリカル研究部, 助教授 (00249963)
KADO Shinichirou  University of Tokyo, High Temperature Plasma Center, Assistant Professor, 高温プラズマ研究センター, 助教授 (10300732)
SAKAKIBARA Satoru  National Institute for Fusion Science, Large Helical Device Research Dep., Assistant Professor, 大型ヘリカル研究部, 助教授 (90280594)
NARUSHIMA Yoshirou  National Institute for Fusion Science, Large Helical Device Research Dep., Research associate, 大型ヘリカル研究部, 助手 (40332184)
Project Period (FY) 2003 – 2005
Project Status Completed (Fiscal Year 2005)
Budget Amount *help
¥33,150,000 (Direct Cost: ¥25,500,000、Indirect Cost: ¥7,650,000)
Fiscal Year 2005: ¥7,800,000 (Direct Cost: ¥6,000,000、Indirect Cost: ¥1,800,000)
Fiscal Year 2004: ¥11,700,000 (Direct Cost: ¥9,000,000、Indirect Cost: ¥2,700,000)
Fiscal Year 2003: ¥13,650,000 (Direct Cost: ¥10,500,000、Indirect Cost: ¥3,150,000)
KeywordsMotional Stark Effect / Pitch angle of magnetic field / Rotational transform / Plasma equilibrium / soft X-ray CCD camera / モーショナルシュタルク効果 / 回転変換角度
Research Abstract

The object of the research is to study a relation between magnetic shear and transport and MHD instability in helical plasma by measuring rotational transform profiles with Motional Stark Effect spectroscopy.
In 2003 fiscal year, the database of plasma plasma equilibrium for various pressure profile and current profile are developed because a local pitch angle of magnetic field is determined by the toroidal current and Pfirsch-Schluter current due to finite beta. In the preparation of Motional Stark Effect spectroscopy, cooled CCD detector is purchased and tested and software for the CCD detector has been developed.
In 2004 fiscal year, the polarization spectrometer using Motional Stark Effect (Motional Stark Effect spectroscopy system) and a preliminary data was taken with the measurement in Large Helical Device. The computer code to calculate the rotational transform determining plasma characteristics from the pitch angle of magnetic field measured with the Motional Stark Effect spectroscopy. In order to study the validity of neutral beam current drive in changing the rotational transform, the current drive experiments have been done in LHD and CHS.
In 2005 fiscal year, radial profiles of rotational transform are measured in the current drive experiment with neutral bema injection. Central rotational transform is reduced by the current drive and how the plasma confinement changes was studied. MHD instability is studied by reducing magnetic shear with the increase of central rotational transform. The effects of rotational transform on the plasma confinement and MHD instability are studied in these experimental research.

Report

(4 results)
  • 2005 Annual Research Report   Final Research Report Summary
  • 2004 Annual Research Report
  • 2003 Annual Research Report
  • Research Products

    (22 results)

All 2006 2005 2003 Other

All Journal Article (21 results) Publications (1 results)

  • [Journal Article] Observation of Minor Collapse of Current-Carrying Plasma in LHD2006

    • Author(s)
      Y.Narushima, S.Sakakibara, K.Y.Watanabe, K.Ida, et al.
    • Journal Title

      Plasma and Fusion Research : Rapid Communications 1

      Pages: 4-4

    • NAID

      130002058801

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Observation of localized oscillations at m/n = 2/1 rational surface during counter neutral beam injection in the Large Helical Device2006

    • Author(s)
      A.Isayama, S.Inagaki, K.Y.Watanabe, Y.Narushima, S.Sakakibara, et al..
    • Journal Title

      Plasma Phys. Control. Fusion 48

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Z Dependence of Neutral Beam Driven Current in LHD and CHS2006

    • Author(s)
      K.Nagaoka, K.Y.Watanabe, K.Ida, M.Yoshinuma, et al.
    • Journal Title

      Journal of Korean Physical Society (to be published)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Development of Integrated Simulation System for Helical Plasmas2006

    • Author(s)
      Yuji Nakamura, M.Yokoyama, N.Nakajima, et al.
    • Journal Title

      Fusion Science and Technology (to be published)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Effect of net toroidal current on measurement of diamagnetic beta value in heliotron Plasma2006

    • Author(s)
      T.Yamaguchi, K.Y.Watanabe, S.Sakakibara, K.Ida, Y.Narushima, K.Narihara, K.Tanaka, T.Tokuzawa, M.Yoshinuma, T.Kobuchi, I.Yamada, K.Kawahata, H.Yamada, LHD Experimental Group
    • Journal Title

      submitted to Plasma Phys Control Fusion (to be published)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Experimental study of nonlinear processes in edge turbulence of toroidal plasmas2006

    • Author(s)
      Y.Nagashima, K.Hoshino, K.Nagaoka, et al.
    • Journal Title

      Plasma and Fusion Research (to be published)(submitted to)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Observation of Minor Collapse of Current-Carrying Plasma in LHD2006

    • Author(s)
      Y.Narushima, S.Sakakibara, K.Y.Watanabe, K.Ida, K.Narihara, S.Ohdachi, S.Inagaki, M.Yoshimuma, I.Yamada, W.A.Cooper, H.Yamada, T.Yamaguchi, Y.Takeiri, LHD Experimental Group
    • Journal Title

      Plasma and Fusion Research : Rapid Communications

      Pages: 1004-1004

    • NAID

      130002058801

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] LHD Experimental Group Observation of localized oscillations at m/n = 2/1 rational surface during counter neutral beam injection in the Large Helical Device2006

    • Author(s)
      A.Isayama, S.Inagaki, K.Y.Watanabe, Y.Narushima, S.Sakakibara, H.Funaba, K.Ida, Y.Nagayama, H.Yamada, K.Kawahata, A.Komori, O.Motojima
    • Journal Title

      Plasma Phys.Control.Fusion 48

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Effect of Plasma current on m=1 mode in LHD2006

    • Author(s)
      Y.Narushima, S.Sakakibara, K.Y.Watanabe, K.Ida, K.Narihara, S.Ohdachi, S.Inagaki, et al.
    • Journal Title

      Plasma Fusion Res. 1

      Pages: 4-4

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Measurements of Rotational Transform due to Noninductive Toroidal Current using Motional Stark Effect Spectroscopy in the Large Helical Device2005

    • Author(s)
      K.Ida, M.Yoshinuma, K.Y.Watanabe, T.Kobuchi, K.Nagaoka
    • Journal Title

      Rev. Sci. Instrum. 76

      Pages: 53505-53505

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Line Ratios within, and, Components of H, Lines from High Energy Hydrogen Atom with Motional Stark Effect2005

    • Author(s)
      K.Ida, M.Yoshinuma, M.Goto, M.Arake, A.Iwamae
    • Journal Title

      J. Plasma Fusion Res. SERIES, 7

      Pages: 5-8

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Heat pulse propagation across the rational surface in a large helical device plasma with counter-neutral beam injection2005

    • Author(s)
      M.Yakovlev, S.Inagaki, T.Shimozuma, S.Kubo, T.Morisaki, Y.Nagayama
    • Journal Title

      Phys. Plasmas 12

      Pages: 92506-92506

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Measurements of Rotational Transform due to Noninductive Toroidal Current using Motional Stark Effect Spectroscopy in the Large Helical Device2005

    • Author(s)
      K.Ida, M.Yoshinuma, K.Y.Watanabe, T.Kobuchi, K.Nagaoka
    • Journal Title

      Rev.Sci.Instrum. 76

      Pages: 53505-53505

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Line Ratios within, and, Components of H, Lines from High Energy Hydrogen Atom with Motional Stark Effect2005

    • Author(s)
      K.Ida, M.Yoshinuma, M.Goto, M.Arake, A.Iwamae
    • Journal Title

      J.Plasma Fusion Res.SERIES Vol.7

      Pages: 5-8

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Heat pulse propagation across the rational surface in a large helical device plasma with counter-neutral beam injection2005

    • Author(s)
      M.Yakovlev, S.Inagaki, T.Shimozuma, S.Kubo, T.Morisaki, Y.Nagayama, K.Kawahata, A.Komori, LHD Experimental Group
    • Journal Title

      Phys.Plasmas 12

      Pages: 92506-92506

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Measurements of rotational transform due to non-inductive toroidal current using Motional Stark Effect spectroscopy in Large Helical Device2005

    • Author(s)
      K.Ida, M.Yoshinuma, K.Y.Watanabe, T.Kobuchi, K.Nagaoka
    • Journal Title

      Rev.Sci.Instrum. 76・1

      Pages: 53505-53505

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Measurement of magnetic field pitch angle using motional stark effect spectroscopy in the compact helical system2003

    • Author(s)
      S.Takayama, K.Ida, et al.
    • Journal Title

      Rev.Sci.Instrum. 74

      Pages: 73-79

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Z Dependence of Neutral Beam Driven Current in LHD and CHS

    • Author(s)
      K.Nagaoka, K.Y.Watanabe, K.Ida, M.Yoshinuma, et al.
    • Journal Title

      Journal of Korean Physical Society (to be published)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Development of Integrated Simulation System for Helical Plasmas

    • Author(s)
      Yuji Nakamura, M.Yokoyama, N.Nakajima, A.Fukuyama, K.Y.Watanabe, H.Funaba, Y.Suzuki, S.Murakami, K.Ida, S.Sakakibara, H.Yamada
    • Journal Title

      Fusion Science and Technology (to be published)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Effect of net toroidal current on measurement of diamagnetic beta value in heliotron Plasma

    • Author(s)
      T.Yamaguchi, K.Y.Watanabe, S.Sakakibara, K.Ida, Y.Narushima, K.Narihara, K.Tanaka, T.Tokuzawa, M.Yoshinuma, T.Kobuchi, I.Yamada, K.Kawahata, H.Yamada, LHD Experimental Group
    • Journal Title

      submitted to Plasma Phys Control Fusion

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Experimental study of nonlinear processes in edge turbulence of toroidal plasmas

    • Author(s)
      Y.Nagashima, K.Hoshino, K.Nagaoka, et al.
    • Journal Title

      submitted to Plasma and Fusion Research

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Publications] S.Takayama, K.Ida, et al.: "Measurement of magnetic field pitch angle using motional stark effect spectroscopy in the compact helical system"Rev.Sci.Instrum.. 74. 73-79 (2003)

    • Related Report
      2003 Annual Research Report

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Published: 2003-04-01   Modified: 2016-04-21  

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