Stability of the detachment front in a tokamak divertor

被引：61

作者：

Krasheninnikov, SI

Rensink, M

Rognlien, TD

Kukushkin, AS

Goetz, JA

LaBombard, B

Lipschultz, B

Terry, JL

Umansky, M

机构：

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

[2] Univ Calif Lawrence Livermore Natl Lab, Livermore, CA 94550 USA

[3] Max Planck Inst Plasmaphys, ITER Garching Joint Work Site, D-85748 Garching, Germany

[4] IV Kurchatov Atom Energy Inst, Moscow 123098, Russia

来源：

JOURNAL OF NUCLEAR MATERIALS | 1999年 / 266卷

关键词：

tokamak; detachment; stability; impurity; recombination;

D O I：

10.1016/S0022-3115(98)00577-7

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Experimental observations show that when a divertor plasma detaches, radiation regions (fronts) move towards the X-point. This indicates that the localization of the fronts in the divertor is unstable. We study theoretically the stability of detached divertor operation and compare our results with experimental data. We show that the impurity radiation and plasma recombination effects play a crucial role in the evolution of detached plasma parameters. In the tokamak SOL these effects result in the saturation of upstream plasma density and temperature as the total number of particles (ions and neutrals) in the SOL is increased, and cause both impurity radiation and ionization-recombination fronts propagation towards the X-point. These conclusions are supported by experimental data from Alcator C-Mod. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：251 / 257

页数：7

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