Magnetowave induced plasma wakefield acceleration for ultrahigh energy cosmic rays.
Magnetowave induced plasma wakefield acceleration for ultrahigh energy cosmic rays.
复制标题
超高能宇宙射线的磁波诱导等离子体尾场加速。
DOI：
10.1103/physrevlett.102.111101
复制
发表时间：
2007
影响因子：
8.6
通讯作者：
R. Sydora
中科院分区：
文献类型：
--
作者：
F. Chang;Pisin Chen;G. Lin;R. Noble;R. Sydora
在相对论性天体物理流出中，磁波诱导等离子体尾流场加速（MPWA）被认为是宇宙粒子加速到超高能量的可行机制。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，第一次。我们调用了高频高速哨声模式作为驱动脉冲。在模拟中得到的等离子体尾流场与我们新提出的相对论理论相吻合。我们表明，在适当的条件下，等离子体尾流场保持非常高的相干性，并且可以在数百个等离子体皮肤深度上维持高梯度加速度。以活动星系核为中心，我们证明了MPWA产生超过ZeV （10{21} eV）的超高能宇宙射线是可能的。
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 ultrahigh 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 obtained in the simulations compares favorably with our newly developed relativistic theory of the MPWA. We show that, under appropriate conditions, the plasma wakefield maintains very high coherence and can sustain high-gradient acceleration over hundreds of plasma skin depths. Invoking active galactic nuclei as the site, we show that MPWA production of ultrahigh energy cosmic rays beyond ZeV (10{21} eV) is possible.