Effects of non-circular tokamak geometry on ion-temperature-gradient driven modes

被引：30

作者：

Anderson, J ^{[1
]}

Nordman, H ^{[1
]}

Weiland, J ^{[1
]}

机构：

[1] Chalmers Univ Technol, EURATOM, NFR Assoc, Dept Electromagnet, S-41296 Gothenburg, Sweden

来源：

PLASMA PHYSICS AND CONTROLLED FUSION | 2000年 / 42卷 / 05期

关键词：

D O I：

10.1088/0741-3335/42/5/305

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 influence of plasma elongation and Shafranov shift on the stability of electrostatic ion-temperature-gradient driven modes (eta(i)-modes) is investigated. An advanced fluid model is used for the ions together with Boltzmann distributed electrons. The derived eigenvalue equation is solved both analytically, in the strong ballooning limit, and numerically. It is found that the effects of elongation change from stabilizing, for peaked density profiles, to destabilizing in the Rat density regime. In addition, it is shown that the maximum growth rate is shifted towards shorter wavelengths as the elongation increases. The effects of shaping on tokamak stability are exemplified with data from a Joint European Torus (JET) high-performance mode discharge.

引用

页码：545 / 555

页数：11

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