摘要
Global linear gyrokinetic simulations using realistic DIII-D tokamak geometry and plasma profiles find co-existence of unstable reversed shear Alfvén eigenmodes(RSAE)with low toroidal mode number n and electromagnetic ion temperature gradient(ITG)instabilities with higher toroidal mode number n.For intermediate n?=?[10,12],RSAE and ITG co-exist and overlap weakly in the radial domain with similar growth rates but different real frequencies.Both RSAE and ITG growth rates decrease less than 5%when compressible magnetic perturbations are neglected in the simulations.The ITG growth rates increase less than 7%when fast ions are not included in the simulations.Finally,the effects of trapped electrons on the RSAE are negligible.
作者
Hongyu WANG
Pengfei LIU
Zhihong LIN
Wenlu ZHANG
王虹宇;刘鹏飞;林志宏;张文禄(Fusion Simulation Center,Peking University,Beijing 100871,People’s Republic of China;Department of Physics and Astronomy,University of California,Irvine,CA 92697,United States of America;Institute of Physics,Chinese Academy of Sciences,Beijing 100190,People’s Republic of China)
基金
supported by the China National Magnetic Confinement Fusion Science Program(Grant No.2018YFE0304100)
the US Department of Energy,Office of Science,Office of Advanced Scientific Computing Research and Office of Fusion Energy Sciences,and the Scientific Discovery through Advanced Computing(Sci DAC)program under Award No.DE-SC0018270(Sci DAC ISEP Center)
the China Scholarship Council(Grant No.201806010067)
used resources of the Oak Ridge Leadership Computing Facility at the Oak Ridge National Laboratory(DOE Contract No.DEAC05-00OR22725)
the National Energy Research Scientific Computing Center(DOE Contract No.DE-AC02-05CH11231)
