中国物理B ›› 2023, Vol. 32 ›› Issue (2): 25203-025203.doi: 10.1088/1674-1056/ac7f89
Ruibo Zhang(张睿博)1,2, Lei Ye(叶磊)1,†, Yang Chen3, Nong Xiang(项农)1, and Xiaoqing Yang(杨小庆)1
Ruibo Zhang(张睿博)1,2, Lei Ye(叶磊)1,†, Yang Chen3, Nong Xiang(项农)1, and Xiaoqing Yang(杨小庆)1
摘要: We investigate the effects of kinetic ions on double-tearing modes (DTMs) using the gyrokinetic particle-in-cell simulation code GEM with a gyrokinetic ion/fluid electron hybrid model. It is found that the ion kinetic effects can decrease the growth rate of the DTMs. This effect is more significant for stronger coupling of DTMs with smaller distance between the rational surfaces. Kinetic ions can also enhance the coupling effect between the two rational surfaces. Energy transfer analyses between particles and wave fields show that the stabilizing effect of kinetic ions comes mainly from the perpendicular magnetic drift of ions in the coupling region and around the outer rational surface.
中图分类号: (Macroinstabilities (hydromagnetic, e.g., kink, fire-hose, mirror, ballooning, tearing, trapped-particle, flute, Rayleigh-Taylor, etc.))