Stability of the resistive wall mode in JET

被引：62

作者：

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

Gimblett, C. G. ^{[1
]}

Gryaznevich, M. P. ^{[1
]}

Hender, T. C. ^{[1
]}

Howell, D. F. ^{[1
]}

Liu, Y. Q. ^{[1
]}

Pinches, S. D. ^{[1
]}

机构：

[1] UKAEA Euratom Fus Assoc, Culham Sci Ctr, Abingdon OX14 3DB, Oxon, England

来源：

PLASMA PHYSICS AND CONTROLLED FUSION | 2009年 / 51卷 / 05期

基金：

英国工程与自然科学研究理事会;

关键词：

ERROR FIELD AMPLIFICATION; DIII-D PLASMAS; HIGH-BETA; STABILIZATION; ROTATION; TOKAMAKS; KINK; BOUNDARY; FEEDBACK; MACHINE;

D O I：

10.1088/0741-3335/51/5/055015

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 kinetic effects influencing the stability of the resistive wall mode (RWM) are investigated by applying a drift kinetic code to calculate the change in the potential energy of the mode in the presence of thermal and energetic particles. The analysis is carried out for typical JET high-beta plasmas. It is found that the strongest kinetic damping of the RWM arises due to mode resonance with the precession motion of the trapped thermal particles. The stability of the RWM in JET plasmas is also probed by using active MHD spectroscopy. The frequency spectrum of the plasma response to oscillating externally applied fields has been measured and fitted to parameter models in order to infer the stability of the RWM. A new model retaining information about the plasma response is presented to describe the resonant field amplification in the presence of a stable RWM.

引用

页数：17

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