Neoclassical tearing mode suppression with ECRH and current drive in ASDEX upgrade

被引：0
|
作者：
Gantenbein, G [1 ]
Keller, A [1 ]
Leuterer, F [1 ]
Maraschek, M [1 ]
Suttrop, W [1 ]
Zohm, H [1 ]
机构：
[1] Univ Stuttgart, Inst Plasmaforsch, D-70569 Stuttgart, Germany
来源：
RADIO FREQUENCY POWER IN PLASMAS | 2003年 / 694卷
关键词：
D O I：
暂无
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：
Neoclassical tearing modes (NTMs) occurring in high beta discharges have a substantial influence on the performance of a tokamak. The suppression and avoidance of these instabilities is considered as a primary task for future machines like ITER, In ASDEX Upgrade, ECRH power is used to stabilise NTMs in high confinement discharges by replacing the 'missing' bootstrap current. For the m=3, n=2 modes complete stabilisation at high beta(N) was successfully demonstrated in ASDEX Upgrade. Additional features in the case of 2/1 NTM are the vicinity of the q = 2 surface to the vacuum vessel which triggers undesirable interaction, leading to mode locking, and the lower plasma temperature and hence lower current drive efficiency compared to the q = 3/2 surface.
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页码：317 / 320
页数：4
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