Abstract
利用一维粒子模拟方法研究了损失锥电子速度分布激发的哨声波非线性演化过程, 并与双麦克斯韦电子分布激发哨声波的情况进行了比较. 结果表明, 这两种情况下, 在线性增长阶段哨声波的主导频率 (能量最集中的一个频率) 是一样的, 波动的激发使得平行于背景磁场方向的电子温度有所提高. 比较而言,在损失锥分布情况下, 哨声波具有主导频率的波模可较早地被激发, 而在线性增长阶段, 哨声波的能量更倾向于集中在高频(短波长)波段. 部分粒子被散射到损失锥中, 而使损失锥分布得以补充. 本文还研究了不同各向异性分布和磁场强度条件下的激发过程.
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