Electron density modulation in magnetic islands in the TUMAN-3M tokamak

被引：14

作者：

Kornev, VA ^{[1
]}

Askinazi, LG ^{[1
]}

Vil'dzhyunas, MI ^{[1
]}

Golant, VE ^{[1
]}

Zhubr, NA ^{[1
]}

Krikunov, SV ^{[1
]}

Lebedev, SV ^{[1
]}

Rozhdestvenskii, VV ^{[1
]}

Tukachinskii, AS ^{[1
]}

机构：

[1] Russian Acad Sci, AF Ioffe Physicotech Inst, St Petersburg 194021, Russia

来源：

PLASMA PHYSICS REPORTS | 2005年 / 31卷 / 10期

基金：

俄罗斯基础研究基金会;

关键词：

Density Gradient; Modulation Structure; Significant Modulation; Density Modulation; Characteristic Density;

D O I：

10.1134/1.2101967

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：

MHD oscillations with m/n = 4/1 and 3/1 that arise at the periphery of the TUMAN-3M tokamak in the initial stage of a discharge are investigated. It is found that these oscillations lead to a significant modulation of the electron density n(e), which is attributable to the accumulation of plasma within a magnetic island. Numerical simulations of the modulation structure made it possible to determine the radius of the resonant surface and the radial width of the island and to evaluate the characteristic density gradient in the island. The gradient was found to be ten times larger than that of the unperturbed profile of n(e)(r) near the resonant surface. This points to reduced plasma transport within the magnetic island. (c) 2005 Pleiades Publishing, Inc.

引用

页码：803 / 808

页数：6

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