聚变等离子体中高能量粒子驱动的鱼骨模不稳定性研究  

Fishbone modes excitied by energetic particles in fusion plasmas

作　　者：赵康[1] 何志雄[2] 蒋海斌[3] 何宏达[2] 

机构地区：[1]西南民族大学,成都610041 [2]核工业西南物理研究院,成都610041 [3]福建工程学院,福州350108

出　　处：《核聚变与等离子体物理》2015年第4期296-301,共6页Nuclear Fusion and Plasma Physics

基　　金：西南民族大学中央高校基本科研业务费专项资金(13NZYQN11)

摘　　要：在考虑高能量粒子密度的空间分布及箍缩角分布的条件下,建立了研究鱼骨模的色散关系,并作了数值研究。结果表明:当高能量粒子的密度高于某个阈值时,鱼骨模会在高能量粒子密度梯度最大处被激发,其频率与高能量粒子的环向进动频率一致。在高β_h区间,高能量勉强通行粒子将驱动鱼骨模进入第二稳定区。高能量捕获粒子能激发非共振鱼骨模,与勉强通行粒子激发的鱼骨模类似,在高β_h区存在第二稳定区。A general dispersion relation for fishbone mode is obtained when spatial density profile and pitch angle profile are taken into account. The fishbone modes can be driven into the second stable regime by barely passing energetic particles in highβh region. The nonresonant fishbone mode can be induced by trapped energetic particles. Similar to the resonant fishbone modes, the nonresonant fishbone modes can also be driven into the second stable regime by trapped energetic particles and the real frequency linearly increases with increasingβh.

关 键 词：聚变等离子体 高能量粒子 鱼骨模 第二稳定区 

分 类 号：O532.11[理学—等离子体物理]