Effects of 'sharpness' of the plasma cross-section on the MHD stability of tokamak edge plasmas

被引：14

作者：

Aiba, N. ^{[1
]}

Tokuda, S. ^{[1
]}

Takizuka, T. ^{[1
]}

Kurita, G. ^{[1
]}

Ozeki, T. ^{[1
]}

机构：

[1] Japan Atom Energy Agcy, Naka, Ibaraki 3110193, Japan

来源：

NUCLEAR FUSION | 2007年 / 47卷 / 04期

关键词：

D O I：

10.1088/0029-5515/47/4/008

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：

The stability of peeling, ballooning, and peeling-ballooning modes, which relate to edge-localized modes, is investigated numerically with the linear ideal magnetohydrodynamic stability code MARG2D. The effects of 'sharpness' on the stability of the peeling-ballooning mode are examined, where the sharpness is defined in terms of the curvature at the top or bottom of the outermost flux surface. It is found that the stability limit of the pressure gradient significantly improves as the sharpness increases even when the ellipticity and the triangularity are unchanged. The sharpness is an important parameter for high performance H-mode operations with high pedestal pressure.

引用

页码：297 / 304

页数：8

共 20 条

[1]

AIBA N, 2007, IN PRESS PLASMA FUSI

[2] Extension of the Newcomb equation into the vacuum for the stability analysis of tokamak edge plasmas [J].