Two-dimensional ion temperature measurement by application of tomographic reconstruction to Doppler spectroscopy

H. Tanabe, A. Kuwahata, H. Oka, M. Annoura, H. Koike, K. Nishida, S. You, Y. Narushima, A. Balandin, M. Inomoto, Y. Ono

研究成果: Article査読

13 被引用数 (Scopus)

抄録

A novel 2D ion temperature measurement for toroidal plasmas has been developed by use of cost-effective discrete tomography reconstruction of 2D ion Doppler spectroscopy composed of a polychromator with an ICCD camera and optical fibres. The 2D projection of the line spectrum collected by 35 (7 × 5) optical fibres is transformed into the r-z profile of the local spectrum by means of the Abel inversion at each wavelength and finally into the 2D (r-z) profile of the ion temperature. Numerical tests of its algorithm indicate that the reconstruction error for a peaked temperature profile is smaller than 15% if the chord-integrated signals have noise smaller than 5%. This system successfully measured the peaked ion temperature profile of a torus plasma on the r-z plane under the condition of negligibly small plasma flow.

本文言語English
論文番号093027
ジャーナルNuclear Fusion
53
9
DOI
出版ステータスPublished - 2013 9
外部発表はい

ASJC Scopus subject areas

  • 核物理学および高エネルギー物理学
  • 凝縮系物理学

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