Rapid energization of radiation belt electrons by nonlinear wave trapping
Rapid energization of radiation belt electrons by nonlinear wave trapping
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DOI：
10.5194/angeo-26-3451-2008
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发表时间：
2008-11
影响因子：
1.9
通讯作者：
Y. Katoh;Y. Omura;D. Summers
中科院分区：
文献类型：
--
作者：
Y. Katoh;Y. Omura;D. Summers
我们发现，非线性波捕获在哨声模式合唱发射的产生和辐射带电子加速到相对论能量中起着重要的作用。我们已经进行了粒子模拟，成功地再现了与升调合唱排放的一代。在这个产生过程中，我们发现一小部分共振电子被称为相对论转向加速（RTA）和超相对论加速（URA）的特殊形式的非线性波捕获非常有效地激发。非线性波捕获粒子加速是一种普遍的加速机制，在空间和宇宙等离子体中可以有效地包含磁镜几何。
We show that nonlinear wave trapping plays a significant role in both the generation of whistler-mode chorus emissions and the acceleration of radiation belt electrons to relativistic energies. We have performed particle simulations that successfully reproduce the generation of chorus emissions with rising tones. During this generation process we find that a fraction of resonant electrons are energized very efficiently by special forms of nonlinear wave trapping called relativistic turning acceleration (RTA) and ultra-relativistic acceleration (URA). Particle energization by nonlinear wave trapping is a universal acceleration mechanism that can be effective in space and cosmic plasmas that contain a magnetic mirror geometry.