Scaling of the marginal βp of neoclassical tearing modes during power ramp-down experiments in ASDEX Upgrade

被引：15
作者：
Maraschek, M
Sauter, O
Günter, S
Zohm, H
机构：
[1] EURATOM, Max Planck Inst Plasmaphys, D-85748 Garching, Germany
[2] EURATOM, CRPP EPFL, Ctr Rech & Phys Plasmas, CH-1015 Lausanne, Switzerland
来源：
PLASMA PHYSICS AND CONTROLLED FUSION | 2003年 / 45卷 / 07期
关键词：
D O I：
10.1088/0741-3335/45/7/322
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：
Based on the models describing the behaviour of neoclassical tearing modes (NTMs), fits for the seed-island triggered excitation and disappearance of these modes at small beta-values have been tested for an extended parameter range in the rho(pi)*-(upsilon) over bar (ii) plane in ASDEX Upgrade. The disappearance of NTMs at the marginal beta(p,marg) during power rampdown phases provides input for a direct comparison with models without the influence of the seed-island size. It has been found that for low q(95) the NTM remains present until the HL-transition, whereas for higher q(95) the mode decays well in H-mode. Scalings for the onset and the marginal beta(p) for the (3/2)-NTM and the analysis of marginal beta(p) for the (2/1)-NTM are presented.
引用
收藏
页码：1369 / 1384
页数：16
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