2005 Fiscal Year Final Research Report Summary
Measurements of rotational transform profile using Motional Stark Effect spectroscopy
| Project/Area Number |
15206106
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Nuclear fusion studies
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| Research Institution | National Institute for Fusion Science |
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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)
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| 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)
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| Project Period (FY) |
2003 – 2005
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| Keywords | Motional Stark Effect / Pitch angle of magnetic field / Rotational transform / Plasma equilibrium / soft X-ray CCD camera |
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| 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.
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[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
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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
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[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
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Journal Title
Plasma and Fusion Research : Rapid Communications
Pages: 1004
Description
「研究成果報告書概要(欧文)」より
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[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
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Journal Title
Plasma Phys.Control.Fusion 48
Pages: L45-L55
Description
「研究成果報告書概要(欧文)」より
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[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
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Journal Title
Fusion Science and Technology (to be published)
Description
「研究成果報告書概要(欧文)」より
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[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
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Journal Title
submitted to Plasma Phys Control Fusion
Description
「研究成果報告書概要(欧文)」より
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