Modeling sawtooth stabilization by energetic ions from neutral beam injection

被引：22

作者：

Chapman, I. T. ^{[1
]}

Pinches, S. D.

Appel, L. C.

Hastie, R. J.

Hender, T. C.

Saarelma, S.

Sharapov, S. E.

Voitsekhovitch, I.

Graves, J. P.

机构：

[1] UKAEA Euratom Fus Assoc, Culham Sci Ctr, Abingdon OX14 2DE, Oxon, England

[2] Ecole Polytech Fed Lausanne, CRPP, Assoc Euratom Confederat Suisse, CH-1015 Lausanne, Switzerland

来源：

PHYSICS OF PLASMAS | 2007年 / 14卷 / 07期

基金：

欧盟地平线“2020”; 英国工程与自然科学研究理事会;

关键词：

D O I：

10.1063/1.2753420

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：

Recent advances in modeling the effects of anisotropic energetic ion distributions have enabled the development of a complete coherent physics explanation of sawtooth stabilization in both conventional and spherical tokamaks. As an example, a complete model has been developed to explain the asymmetric stabilization of sawteeth with respect to neutral beam injection direction in the Joint European Torus. This asymmetric sawtooth stabilization [M. Nave , Phys. Plasmas 13, 014503 (2006)] arises because of both the destabilizing contribution from the counterpassing ions and the strong modification of the stabilizing contribution of the nonadiabatic trapped ions due to flow shear. The fast particle effects including pressure anisotropy, sheared flows, and the adiabatic response to the internal kink mode have been modeled in general toroidal geometry for the first time.

引用

页数：4

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