Fe14+ and Fe15+ Spatial Distributions in a LHD Plasma Reconstructed from Multiple-Viewing-Chord EUV-Emission Observation

• YANAGIBAYASHI Jun

  Department of Mechanical Engineering and Science, Graduate School of Engineering, Kyoto University, Kyoto 606-8501, Japan

• GOTO Motoshi

  National Institute for Fusion Science, Toki 509-5292, Japan

• DONG Chunfeng

  National Institute for Fusion Science, Toki 509-5292, Japan

• MORITA Shigeru

  National Institute for Fusion Science, Toki 509-5292, Japan

• HASUO Masahiro

  Department of Mechanical Engineering and Science, Graduate School of Engineering, Kyoto University, Kyoto 606-8501, Japan

抄録

We have observed Fe¹⁴⁺ (3s^{2 1}S₀ - 3s3p ¹P₁) and Fe¹⁵⁺ (3s ²S_1/2 - 3p ²P_3/2) emissions from a LHD plasma with a space-resolved extreme-ultraviolet spectrometer. The observed intensity distributions against the viewing chord for the respective emissions are reconstructed to the emission flux distributions in the plasma against the normalized radius of the poloidal cross section with a maximum entropy method. Both of the emissions localize in the periphery region, and the Fe¹⁴⁺ emission is located outer side than that of Fe¹⁵⁺. We calculate the charge state distribution of Fe ions against the normalized radius assuming the ionization equilibrium at the electron temperature and density, which are measured by a Thomson scattering method. The calculated result is consistent with the experimental one.

収録刊行物

• Plasma and Fusion Research

  Plasma and Fusion Research 6 2402060-2402060, 2011

  一般社団法人 プラズマ・核融合学会

キーワード

• highly charged ion
• impurity
• iron
• EUV spectrum
• spatial distribution
• LHD plasma
• periphery plasma

詳細情報

• CRID: 1390001205253341824
• NII論文ID: 130002059532
• DOI: 10.1585/pfr.6.2402060
• ISSN: 18806821
• Web Site: http://www.jstage.jst.go.jp/article/pfr/6/0/6_0_2402060/_pdf
• 本文言語コード: en
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