超高能宇宙射线的电磁波诱导等离子体尾场加速
Magnetowave Induced Plasma Wakefield Acceleration for Ultra High Energy Cosmic Rays
摘要：
相对论天体物理外流中的磁波诱导等离子体尾场加速（MPWA）被认为是宇宙粒子加速到超高能的可行机制。在这里，我们提出的模拟结果，清楚地证明了这种机制的可行性的第一次。我们调用高频和高速哨声模式的驱动脉冲。由此产生的等离子体尾流场与理论预言相符。我们表明，在适当的条件下，等离子体尾场保持非常高的相干性，可以维持高梯度加速超过宏观距离。以伽马射线暴（GRB）为源，我们证明了MPWA产生ZeV 10 ^21 eV以上的超高能宇宙射线（UHECR）是可能的。
英文摘要：
Magnetowave induced plasma wakefield acceleration (MPWA) in a relativistic astrophysical outflow has been proposed as a viable mechanism for the acceleration of cosmic particles to ultra high energies. Here we present simulation results that clearly demonstrate the viability of this mechanism for the first time. We invoke the high frequency and high speed whistler mode for the driving pulse. The plasma wakefield so induced validates precisely the theoretical prediction. We show that under appropriate conditions, the plasma wakefield maintains very high coherence and can sustain high-gradient acceleration over a macroscopic distance. Invoking gamma ray burst (GRB) as the source, we show that MPWA production of ultra high energy cosmic rays (UHECR) beyond ZeV 10^21 eV is possible.
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