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Acceleration of energetic particles by compressible plasma waves of arbitrary scale sizes

机译：任意尺度尺寸的可压缩等离子体波对高能粒子的加速

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This paper presents a calculation of energetic particle acceleration by a train of compressible plasma waves of arbitrary scale sizes. It is an extension of the work by Zhang [1]. The compressible plasma waves can broaden the momentum distribution of particles significantly only when the particle diffusion scale u0014/V is greater than the size of each compression zone but is smaller than the spatial extent of wave presence. The accelerated particles downstream of the compressible waves will typically have a power-law distribution at momenta far away from the source injection momentum with a slope only slightly steeper than the diffusive shock acceleration with the same plasma compression ratio. If the source particles are continuously injected in the entire wave span, after enough wave cycles, the summed distribution of accelerated particles can approach to an asymptotic p.3 distribution which does not seem to depend on any model parameters. This distribution of particles contains divergent amount of pressure. A nonlinear interaction between the wave and accelerated particles must be considered in order to produce a p.5 distribution.
机译：本文介绍了通过一系列任意大小的可压缩等离子体波计算的高能粒子加速度。这是张[1]的工作的延伸。仅当粒子扩散尺度u0014 / V大于每个压缩区域的大小但小于波存在的空间范围时，可压缩的等离子波才能显着加宽粒子的动量分布。可压缩波下游的加速粒子通常在远离源注入动量的瞬间具有幂律分布，其斜率仅比具有相同等离子压缩比的扩散冲击加速度略大。如果在整个波跨中连续注入源粒子，则在经过足够的波周期后，加速粒子的总分布可能接近于渐近的p.3分布，这似乎并不依赖于任何模型参数。颗粒的这种分布包含不同量的压力。为了产生p.5分布，必须考虑波与加速粒子之间的非线性相互作用。

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