Fishbone Instability Excited by Barely Trapped Electrons
WANG Zhong-Tian1, LONG Yong-Xing1, DONG Jia-Qi1, WANG Long2, Fulvio Zonca3
1Southwestern Institute of Physics, PO Box 432, Chengdu 610041
2Institute of Physics, Chinese Academy of Sciences, Beijing 100080
3Associazione EURATOM-ENEA, Sulla Fusione, C.P. 65-00044 Frascati, Rome, Italy
Fishbone Instability Excited by Barely Trapped Electrons
WANG Zhong-Tian1;LONG Yong-Xing1;DONG Jia-Qi1;WANG Long2;Fulvio Zonca3
1Southwestern Institute of Physics, PO Box 432, Chengdu 610041
2Institute of Physics, Chinese Academy of Sciences, Beijing 100080
3Associazione EURATOM-ENEA, Sulla Fusione, C.P. 65-00044 Frascati, Rome, Italy
Abstract： Fishbone instability excited by barely trapped suprathermal electrons (BTSEs) in tokamaks is investigated theoretically. The frequency of the mode is found to close to procession frequency of BTSEs. The growth rate of the mode is much smaller than that of the ideal magnetohytrodynamic (MHD) internal kink mode that is in contrast to the case of trapped ion driven fishbone instability. The analyses also show that spatial density gradient reversal is necessary for the instability. The correlation of the results with experiments is discussed.
YANG Qing-Wei;ZHOU Hang-Yu;FENG Bei-Bin;LIU Yi;PAN Yu-Dong;LI Wei;DUAN Xu-Ru;CHEN Wei;CUI Zheng-Ying;JI Xiao-Quan;DING Xuan-Tong;HL-A team. A New Criterion for Disruption Prediction on HL-2A[J]. 中国物理快报, 2006, 23(4): 891-894.
2006, Vol. 23 
