Counter-Streaming Interaction between Fast Magnetosonic Wave and Radiation Belt Electrons

• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2013,（5）
• 页码范围: 187-190
• 页数: 4页
• 语种: 英文
• DOI: 10.1088/0256-307X/30/5/059401

摘要

Fast magnetosonic (MS) waves have been suggested to be able to effectively accelerate radiation belt electrons.We present gyro-averaged test-particle simulations to investigate counter-streaming interaction between MS wave and radiation belt electrons.It is found that an MS wave can significantly scatter counter-streaming electrons through a non-resonant process.The corresponding energy diffusion coefficients for counter-streaming interaction are always comparable to those for co-streaming interaction,independent of wave normal angle.The pitch-angle and cross diffusion coefficients of counter-streaming interaction are much smaller than those of co-streaming interaction for small normal angles,while they become comparable for large normal angles.Moreover,the bounce-averaged diffusion coefficients exhibit quite different distribution from those for co-streaming or counterstreaming alone in the pitch-angle-energy space.These results suggest that the non-resonant effect associated with counter-streaming interaction is indispensable for the acceleration processes driven by an MS wave.