Effect of Kinetic Ions on the Toroidal Double-Tearing Modes
Effect of Kinetic Ions on the Toroidal Double-Tearing Modes
复制标题
动离子对环形双撕裂模式的影响
DOI：
10.1088/1674-1056/ac7f89
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发表时间：
2022-07
影响因子：
1.7
通讯作者：
Xiao-Qing Yang
中科院分区：
文献类型：
--
作者：
Rui-Bo Zhang;Lei Ye;Yang Chen;Nong Xiang;Xiao-Qing Yang
抽象。利用回旋动力学粒子模拟程序GEM，采用回旋动力学离子/流体电子混合模型，研究了动力学离子对双撕裂模（DTM）的影响。结果表明，离子动力学效应会降低DTM的生长速率。对于有理表面之间距离较小的DTM耦合较强的情况，这种影响更加显着。动力学离子也可以增强两个有理表面之间的耦合效应。粒子与波场之间的能量传递分析表明，运动离子的稳定作用主要来自于耦合区和外理性表面附近离子的垂直磁漂移。
Abstract. The effects of kinetic ions on the Double-Tearing Modes (DTM) are studied by using the gyrokinetic particle-in-cell (PIC) 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 DTM. This effect is more significant for stronger coupling of DTM 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.