Transport of High-energy Charged Particles through Spatially Intermittent Turbulent Magnetic Fields
Transport of High-energy Charged Particles through Spatially Intermittent Turbulent Magnetic Fields
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DOI：
10.3847/1538-4357/ab7a19
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发表时间：
2020-04-01
影响因子：
4.9
通讯作者：
Gregori, G.
中科院分区：
文献类型：
--
作者：
Chen, L. E.;Bott, A. F. A.;Gregori, G.
确定最高能量宇宙射线的来源需要了解它们是如何被随机的、空间上间歇性的星系间磁场偏转的。在这里，我们报告的测量充满活力的带电粒子通过激光产生的磁化等离子体与这些属性的传播。我们的特点的扩散传输的粒子实验。结果表明，传输是扩散的，并且对于最高能量宇宙线的感兴趣的区域，扩散系数不受磁场的空间不稳定性的影响。
Identifying the sources of the highest energy cosmic rays requires understanding how they are deflected by the stochastic, spatially intermittent intergalactic magnetic field. Here we report measurements of energetic charged-particle propagation through a laser-produced magnetized plasma with these properties. We characterize the diffusive transport of the particles experimentally. The results show that the transport is diffusive and that, for the regime of interest for the highest energy cosmic rays, the diffusion coefficient is unaffected by the spatial intermittency of the magnetic field.