The role of particle sinks and sources in Alcator C-Mod detached divertor discharges

被引：40

作者：

Lipschultz, B ^{[1
]}

Terry, JL ^{[1
]}

Boswell, C ^{[1
]}

Goetz, JA ^{[1
]}

Hubbard, AE ^{[1
]}

Krasheninnikov, SI ^{[1
]}

LaBombard, B ^{[1
]}

Pappas, DA ^{[1
]}

Pitcher, CS ^{[1
]}

Wising, F ^{[1
]}

Wukitch, S ^{[1
]}

机构：

[1] MIT, Plasma Sci & Fus Ctr, Cambridge, MA 02139 USA

来源：

PHYSICS OF PLASMAS | 1999年 / 6卷 / 05期

关键词：

D O I：

10.1063/1.873448

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：

Detailed measurements of the magnitude and location of volumetric recombination occurring in the detached divertor of Alcator C-Mod tokamak [I. H. Hutchinson et al., Phys. Plasmas 1, 1511 (1994)] are presented. The drop in divertor plate ion current during detachment is due to two mechanisms: (1) volumetric recombination in the divertor plasma; and (2) reductions in the divertor ion source. Depending on plasma conditions, each of these can be the primary mechanism for the observed ion current reduction in detachment. The ion source during detachment is inferred and its magnitude is consistent with the measured divertor power flow. A scaling of the density in the divertor recombining region for L- (low confinement) mode plasmas is found, n(e,r)proportional to (n) over bar(e)(0.8).P-SOL(2/7). A model based on pressure variation along a flux surface during detachment is consistent with the main features of this scaling. (C) 1999 American Institute of Physics. [S1070-664X(99)93505-X].

引用

页码：1907 / 1916

页数：10

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