H-MODE OF W7-AS STELLARATOR

被引：70

作者：

WAGNER, F ^{[1
]}

BALDZUHN, J ^{[1
]}

BRAKEL, R ^{[1
]}

BURHENN, R ^{[1
]}

ERCKMANN, V ^{[1
]}

ESTRADA, T ^{[1
]}

GRIGULL, P ^{[1
]}

HARTFUSS, HJ ^{[1
]}

HERRE, G ^{[1
]}

HIRSCH, M ^{[1
]}

HOFMANN, JV ^{[1
]}

JAENICKE, R ^{[1
]}

RUDYJ, A ^{[1
]}

STROTH, U ^{[1
]}

WELLER, A ^{[1
]}

机构：

[1] ASSOC EURATOM CIEMAT, E-28040 MADRID, SPAIN

来源：

PLASMA PHYSICS AND CONTROLLED FUSION | 1994年 / 36卷 / 07期

关键词：

D O I：

10.1088/0741-3335/36/7A/006

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：

In W7-AS the H-mode has been observed for the first time in a currentless stellarator plasma. H-modes are achieved with 0.4 MW Electron Cyclotron Resonance Heating with 140 GHz at 2.5 T and high density, with 70 GHz at 1.25 T and lower density and with neutral beam injection. The H-phases display all characteristics known from tokamak H-modes including the development of an edge transport barrier, an increase of the poloidal impurity flow velocity at the edge, the reduction of edge turbulence and ELMs. The power threshold for the H-mode seems to be lower than that in tokamaks and is in agreement With an n(e)B(T)BAR scaling. Major differences to the divertor H-mode is the small increase in energy content of maximally 30%, the lack of a strong isotope effect both in threshold and in H-mode characteristics and a peculiarly narrow operational range in iota.

引用

页码：A61 / A74

页数：14

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