The fishbone instability in ASDEX Upgrade
The fishbone instability in ASDEX Upgrade
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DOI：
10.1088/0029-5515/38/6/303
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发表时间：
1998
期刊：
影响因子：
3.3
通讯作者：
T. Kass;H.-S. Bosch;F. Hoenen;K. Lackner;M. Maraschek;H. Zohm;Asdex Upgrade Team
中科院分区：
文献类型：
--
作者：
T. Kass;H.-S. Bosch;F. Hoenen;K. Lackner;M. Maraschek;H. Zohm;Asdex Upgrade Team
在ASDEX升级中，对鱼骨不稳定性的激发进行了实验研究。鱼骨振荡的初始频率与快速捕获离子的环形进动频率成比例。发现了一个新的特征，即鱼骨模与边缘局域模（ELM）不稳定性的耦合，当βfast = βtor/（1+τE /τsd）超过一定阈值时，ASDEX Upgrade才出现鱼骨模。因此，它是可能的，以计算它们的不稳定制度的全球等离子体参数，如等离子体电流，等离子体密度，环形磁场和中心电子温度。
In ASDEX Upgrade the excitation of the fishbone instability has been experimentally investigated. The initial frequency of the fishbone oscillation scales with the toroidal precession frequency of the fast trapped ions. A new feature, the coupling of the fishbone mode with the edge localized mode (ELM) instability during high-β discharges, is found. Fishbones occur in ASDEX Upgrade only for βfast = βtor/(1+τE /τsd) above a certain threshold. It is thus possible to calculate their destabilization regime in terms of global plasma parameters, such as plasma current, plasma density, toroidal magnetic field and central electron temperature.