[P-EM29_30AM2] プラズマ宇宙：波動粒子相互作用，粒子加速，相対論的プラズマ

[PEM29-07] 平行衝撃波での上流波と粒子加速の共進現象

*杉山 徹¹、藤本 正樹² (1.海洋研究開発機構、2.宇宙航空研究開発機構)

キーワード：無衝突衝撃波, 粒子加速, 波動粒子相互作用

We have investigated the co-evolution of upstream waves and the accelerated particles around the parallel shock. Hybrid particle simulations are performed in the exactly parallel shock configuration with Mach number of ~10. The upstream waves convecting into the shock surface contribute the particles acceleration as reported in Sugiyama et al. (2001). The appropriate wave-length exists for the particle energization, that is, the longer wave-length wave leads the higher energy particles. Simultaneously, the higher energized particles excite the longer wave-length waves in the upstream region. Here we report that the higher energy particles and longer wave-length waves are observed as the time elapses later in the simulation runs. Therefore, the present process is "co-evolution" of the upstream waves and accelerated particles.