Influence of ELMs on operation of ICRF antennas in ASDEX upgrade

被引：10

作者：

Bobkov, VV

Braun, F

Hartmann, DA

Lamalle, P

Monakhov, I

Noterdaeme, JM

Wouters, P

Würsching, E

机构：

[1] Max Planck Inst Plasma Phys, D-85748 Garching, Germany

[2] Royal Mil Acad, TEC, Assoc EURATOM Belgian State, KMS,LPP,ERM, B-1000 Brussels, Belgium

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

[4] State Univ Ghent, EESA Dept, B-9000 Ghent, Belgium

来源：

JOURNAL OF NUCLEAR MATERIALS | 2005年 / 337卷 / 1-3期

关键词：

ASDEX Upgrade; ELM; ICRF antenna; RF discharge;

D O I：

10.1016/j.jnucmat.2004.10.109

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The coupling characteristics of the ion cyclotron range of frequencies antenna during type I edge localized modes (ELMs), asymmetries in the reaction of toroidally distributed antennas to ELMs and arcing phenomena following ELMs are studied for ASDEX Upgrade. The maximum change of the antenna resistance due to ELMs increases with triangularity delta(L) in the on-axis minority heating. In the cases with off-axis heating, the change of the resistance is less sensitive to delta(L). Time-resolved RF measurements show asymmetries in times of response of the toroidally distributed antennas to the rising edge of ELMs and in the further evolution of this response. Toroidal propagation of ELM perturbations in counter-current direction with times approximate to 50 mu s for one toroidal turn is observed. ELM-induced arcing is observed during ELMs and with delays after ELMs. Conditioning takes place as the arc number during ELMs decreases and time delay between ELM and are increases. (c) 2004 Elsevier B.V. All rights reserved.

引用

页码：776 / 780

页数：5

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