Plasma and Fusion Research

Volume 6, 2402081 (2011)

Regular Articles

Transport Study of LHD High-Beta Plasmas Based on Power Balance Analysis with TASK3D Code Module

Ryosuke SEKI, Hisamichi FUNABA, Kiyomasa WATANABE, Satoshi OHDACHI, Yasuhiro SUZUKI, Satoru SAKAKIBARA, Masahiko SATO, Masayuki YOKOYAMA, Sadayoshi MURAKAMI¹⁾, Atsushi FUKUYAMA¹⁾ and Noriyoshi NAKAJIMA

: National Institute for Fusion Science, Toki 509-5292, Japan
1): Graduate School of Engineering Kyoto University, Kyoto 606-8501, Japan

(Received 22 December 2010 / Accepted 22 April 2011 / Published 12 July 2011)

Abstract

We customized TASK3D in order to add a new function, TR-snap, for evaluating transport coefficients on the basis of a power balance analysis. To check the validity of the TR-snap's results, the thermal transport coefficient evaluated by TR-snap was compared with results of PROCTR, which is used as the transport analysis code in the Large Helical Device (LHD). The thermal transport coefficient evaluated by TR-snap was almost the same as that of PROCTR. The effect of re-entering fast ions on the transport coefficients in a typical LHD high-beta plasma was investigated using customized TASK3D. When the effect of the re-entering fast ions on the neutral-beam injection heating efficiency is considered, the thermal transport coefficient is slightly larger than that without considering the re-entering fast ions. However, the tendency of the thermal transport coefficient with considering the re-entering fast ions is rarely different from the previously identified tendency.

Keywords

transport analysis code, power balance analysis, TASK3D, re-entering fast ion, high-beta plasma

DOI: 10.1585/pfr.6.2402081

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This paper may be cited as follows:

Ryosuke SEKI, Hisamichi FUNABA, Kiyomasa WATANABE, Satoshi OHDACHI, Yasuhiro SUZUKI, Satoru SAKAKIBARA, Masahiko SATO, Masayuki YOKOYAMA, Sadayoshi MURAKAMI, Atsushi FUKUYAMA and Noriyoshi NAKAJIMA, Plasma Fusion Res. 6, 2402081 (2011).