Neoclassical transport optimization of LHD

被引：90

作者：

Murakami, S ^{[1
]}

Wakasa, A

Maassberg, H

Beidler, CD

Yamada, H

Watanabe, KY

机构：

[1] Natl Inst Fus Sci, Gifu 5095292, Japan

[2] Hokkaido Univ, Grad Sch Engn, Sapporo, Hokkaido 0608628, Japan

[3] Max Planck Inst Plasma Phys, Teilinst Greifswald, D-17491 Greifswald, Germany

来源：

NUCLEAR FUSION | 2002年 / 42卷 / 11期

关键词：

D O I：

10.1088/0029-5515/42/11/101

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

Neoclassical transport is studied for large helical device (LHD) configurations in which the magnetic axis has been shifted radially by determining the mono-energetic transport coefficient and the effective helical ripple. With respect to the transport in the long mean-free-path collisionality region-the so-called 1/v transport-the optimum configuration is found when the magnetic axis has a major radius of 3.53 m, which is 0.22 In inward shifted from the 'standard' configuration of LHD. In the optimized case, the effective helical ripple is very small, remaining below 2% inside 4/5 of the plasma radius. This indicates that a strong inward shift of the magnetic axis in the LHD can diminish the neoclassical transport to a level typical of so-called 'advanced stellarators'.

引用

页码：L19 / L22

页数：4

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