[Table of Contents]

Plasma and Fusion Research

Volume 8, 2403089 (2013)

Regular Articles


Development of Transport Model in Reactor Plasmas based on LHD Experiment Scaling
Ryosuke SEKI, Masahiko SATO, Kiyomasa WATANABE, Hisamichi FUNABA, Yasuhiro SUZUKI, Satoru SAKAKIBARA, Atsushi FUKUYAMA1), Sadayoshi MURAKAMI1) and Noriyoshi NAKAJIMA
National Institute for Fusion Science, Toki 509-5292, Japan
1)
Graduate School of Engineering Kyoto University, Kyoto 606-8501, Japan
(Received 9 December 2012 / Accepted 16 April 2013 / Published 15 August 2013)

Abstract

We propose a transport model based on a systematic analysis of local transport for a large number of Large Helical Device discharges. This model allows us to more accurately predict the plasma performance compared with early researches in the helical plasmas. The proposed model has been applied to the integrated modeling code, TASK3D. We have developed a code to predict the confinement performance in the reactor-relevant high-beta regime. In the predictions of high-beta discharges maintained by NBIs, when field strength increases from 0.43 T to 0.9 T, the achievable beta value decreases by about 1%, but the magnetic Reynolds number increases about 10 times larger. In the prediction to add the perpendicularly NBs with the “re-entering fast ion” effect, the achievable beta value increase by about 0.3%. On the other hand, the magnetic Reynolds number barely changes.


Keywords

transport model, prediction, high beta, LHD, re-entering fast ion

DOI: 10.1585/pfr.8.2403089


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This paper may be cited as follows:

Ryosuke SEKI, Masahiko SATO, Kiyomasa WATANABE, Hisamichi FUNABA, Yasuhiro SUZUKI, Satoru SAKAKIBARA, Atsushi FUKUYAMA, Sadayoshi MURAKAMI and Noriyoshi NAKAJIMA, Plasma Fusion Res. 8, 2403089 (2013).