Linear gyrokinetic simulations of reversed shear Alfven eigenmodes and ion temperature gradient modes in DIII-D tokamak

• 作者: Hongyu WANG Pengfei LIU Zhihong LIN Wenlu ZHANG
• 来源期刊: 等离子体科学和技术（英文版）
• 年，卷（期）: 2021,（1）
• 所属期刊栏目: MAGNETICALLY CONFINED PLASMA
• 页码范围: 30-36
• 页数: 7页
• 语种: 英文

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.