Island divertor experiments on the Wendelstein 7-AS stellarator

被引：36

作者：

McCormick, K ^{[1
]}

Grigull, P ^{[1
]}

Burhenn, R ^{[1
]}

Brakel, R ^{[1
]}

Ehmler, H ^{[1
]}

Feng, Y ^{[1
]}

Fischer, R ^{[1
]}

Gadelmeier, F ^{[1
]}

Giannone, L ^{[1
]}

Hildebrandt, D ^{[1
]}

Hirsch, A ^{[1
]}

Holzhauer, E ^{[1
]}

Jaenicke, R ^{[1
]}

Kisslinger, J ^{[1
]}

Klinger, T ^{[1
]}

Klose, S ^{[1
]}

Knauer, JP ^{[1
]}

König, R ^{[1
]}

Kühner, G ^{[1
]}

Laqua, HP ^{[1
]}

Naujoks, D ^{[1
]}

Niedermeyer, H ^{[1
]}

Pasch, E ^{[1
]}

Ramasubramanian, N ^{[1
]}

Rust, N ^{[1
]}

Sardei, F ^{[1
]}

Wagner, F ^{[1
]}

Weller, A ^{[1
]}

Wenzel, U ^{[1
]}

Werner, A ^{[1
]}

机构：

[1] EURATOM, Max Planck Inst Plasmaphys, D-85748 Munich, Germany

来源：

JOURNAL OF NUCLEAR MATERIALS | 2003年 / 313卷

关键词：

stellarator; W7-AS; island divertor; H-mode; impurity control; plasma properties;

D O I：

10.1016/S0022-3115(02)01506-4

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A promising new operational regime on the Wendelstein stellarator W7-AS has been discovered, fulfilling the conditions of optimal core behavior in combination with edge parameters suitable for successful divertor scenarios. This regime, the high density H-mode (HDH), displays no systematically evident mode activity, and is edge localized mode (ELM)-free. It is extant above a power-dependent threshold density and characterized by flat density profiles, high energy- and low. impurity-confinement times and edge-localized radiation. Impurity accumulation, normally associated with ELM-free H-modes, is avoided. Quasi-stationary discharges with line-averaged densities (n) over bar (e) to 4 x 10(20) m(-3), radiation levels to 90%, and partial plasma detachment at the divertor target plates can be simultaneously realized. Energy confinement is up to twice that predicted by a conventional scaling. HDH has been attained for both H+ and D+ plasmas. The development of plasma energy as a function of density shows an isotopic dependence. (C) 2003 Elsevier Science B.V. All rights reserved.

引用

页码：1131 / 1140

页数：10

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