Identification of geodesic chirping Alfven modes and q-factor estimation in hot core tokamak plasmas in ASDEX Upgrade

被引：4

作者：

Elfimov, A. G. ^{[1
]}

Galvao, R. M. O. ^{[1
,3
]}

Garcia-Munoz, M. ^{[2
]}

Igochine, V. ^{[2
]}

Lauber, P. ^{[2
]}

Maraschek, M. ^{[2
]}

机构：

[1] Univ Sao Paulo, Inst Phys, BR-05508900 Sao Paulo, Brazil

[2] Max Planck Inst Plasma Phys, EURATOM Assoc, D-85748 Garching, Germany

[3] Ctr Brasileiro Pesquisas Fis, BR-22290180 Rio De Janeiro, Brazil

来源：

PLASMA PHYSICS AND CONTROLLED FUSION | 2011年 / 53卷 / 02期

关键词：

Q factor measurement - Geodesy - Electric discharges - Magnetoplasma;

D O I：

10.1088/0741-3335/53/2/025006

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：

Alfven eigenmodes (AE) driven by ion cyclotron resonance heating are usually registered by different diagnostic channels in the hot core plasmas of large tokamaks like JET and ASDEX Upgrade. These AE appear very near to the extremum points of Alfven wave continuum, which is modified by the geodesic effect due to poloidal mode coupling. It is shown that the AE spectrum may be explored as the magnetic spectroscopy (like Alfven cascades by Sharapov et al 2001 Phys. Lett. A 289 127) to determine the q-factor minimum and geodesic frequency at the magnetic axis in standard sawtoothed discharges without reversed shear.

引用

页数：6