Toroidally localized and nonlocalized ballooning instabilities in a stellarator

被引：19

作者：

Cuthbert, P ^{[1
]}

Lewandowski, JLV

Gardner, HJ

Persson, M

Singleton, DB

Dewar, RL

Nakajima, N

Cooper, WA

机构：

[1] Australian Natl Univ, Res Sch Phys Sci & Engn, Dept Theoret Phys, Canberra, ACT 0200, Australia

[2] Australian Natl Univ, Res Sch Phys Sci & Engn, Plasma Res Lab, Canberra, ACT 0200, Australia

[3] Australian Natl Univ, Supercomp Facil, Canberra, ACT 0200, Australia

[4] Natl Inst Fus Sci, Gifu 50952, Japan

[5] Ecole Polytech Fed Lausanne, Ctr Rech Phys Plasmas, PPB Ecublens, CH-1015 Lausanne, Switzerland

来源：

PHYSICS OF PLASMAS | 1998年 / 5卷 / 08期

关键词：

D O I：

10.1063/1.873014

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：

It is shown that the coexistence of toroidally nonlocalized ideal-hydromagnetic ballooning instabilities, with a quasidiscrete spectrum, and toroidally localized ballooning instabilities with a broad continuous spectrum, as predicted by Dewar and Glasser [Phys. Fluids 26, 3038 (1983)] can be realized in a Mercier-unstable equilibrium case modeling the Large Helical Device (LHD) [A. Iiyoshi et al., Fusion Technol. 17, 148 (1990)] with a broad pressure profile. The quasidiscrete, interchange branch corresponds to extended modes that can be understood on the basis of a ripple-averaged ballooning equation, whereas the broad-continuum, ballooning branch corresponds to modes localized along a flux tube, The physical origin of the two branches is discussed. (C) 1998 American Institute of Physics.

引用

页码：2921 / 2931

页数：11

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