Role of divertor geometry on detachment and core plasma performance in JT60U

被引：66

作者：

Asakura, N ^{[1
]}

Hosogane, N ^{[1
]}

Itami, K ^{[1
]}

Sakasai, A ^{[1
]}

Sakurai, S ^{[1
]}

Shimizu, K ^{[1
]}

Shimada, M ^{[1
]}

Kubo, H ^{[1
]}

Higashijma, S ^{[1
]}

Takenaga, H ^{[1
]}

Tamai, H ^{[1
]}

Konoshima, S ^{[1
]}

Sugie, T ^{[1
]}

Masaki, K ^{[1
]}

Koide, Y ^{[1
]}

Naito, O ^{[1
]}

Shirai, H ^{[1
]}

Takizuka, T ^{[1
]}

Ishijima, T ^{[1
]}

Suzuki, S ^{[1
]}

Kumagai, A ^{[1
]}

机构：

[1] Japan Atom Energy Res Inst, Naka Fus Res Estab, Naka, Ibaraki 31101, Japan

来源：

JOURNAL OF NUCLEAR MATERIALS | 1999年 / 266卷

关键词：

divertor; divertor plasma; detached plasma; neutral transport; energy confinement time;

D O I：

10.1016/S0022-3115(98)00818-6

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Experimental results related to the divertor geometry such as divertor plasma detachment, neutral transport and plasma energy confinement, were compared in the open and W-shaped divertors. The ion flux near the outer strike point was larger than in the open divertor, and the electron temperature at the target, T-c(div), was reduced. Divertor detachment and x-point MARFEs occurred at (n) over bar(e) 10-20% lower than that for the open divertor. Although the leakage of neutrals from the divertor to the main chamber decreased, a neutral source in the main chamber due to an interaction of the outer scrape-off layer (SOL) plasma to the baffle plates became dominant above the baffle. Degradation in the enhancement factor of the energy confinement was observed similarly in the open and W-shaped diverters. The neutral density inside the separatrix was estimated to be a factor of 2-3 smaller, which did not affect the energy confinement. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：182 / 188

页数：7

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