中文摘要：

系统分析了Kappa空间等离子体中哨声波合声模的非稳定性．研究发现，高能电子的数密度和温度各向异性越高，哨声波的增长率以及正增长率所对应的频率范围也越大；当电子温度过低或过高时，高能电子与哨声波的相互作用较弱，导致增长率较低；磁纬度越高，传播角越大，增长率越小．利用射线追踪的结果分析了哨声波合声模在传播过程中的增益和衰减过程，计算结果表明，在同等条件下，低频段哨声波合声模的增益远大于高频段哨声波合声模的增益．

英文摘要：

A systematic study on the instability of whistler mode chorus in space plasma by a Kappa distribution was presented. When the anisotropy or the number density of energetic electrons increases, the wave growth rate increases and the frequency range of positive growth rate is broader. If the temperature of energetic electrons is very low or very high, the interaction between the particles and wave are relatively weak and the growth rate is relatively low. The path-integrated gain of whistler-mode chorus was calculated based on ray trace results and it is found that the lower band chorus has a much higher path-integrated gain than an upper band chorus under the same conditions.