辐射反作用冷却作为具有反转布居的各向异性动量分布的来源
Radiation reaction cooling as a source of anisotropic momentum distributions with inverted populations
AI总结：
本研究聚焦强电磁场与辐射反作用下无碰撞等离子体的动量分布特性，解析推导强磁场中等离子体环形动量分布的形成时间尺度，并经粒子模拟验证，揭示该分布的动力学不稳定性可引发相干辐射，对天体物理和实验室等离子体研究具有意义。
摘要：
在强电磁场和辐射反作用存在的条件下，等离子体会形成具有布居反转特征的各向异性动量分布。这是考虑辐射反作用力时无碰撞等离子体的普遍性质。我们研究了强磁场中等离子体的情况，证明了环形动量分布的形成，并推导了该构型下环形结构的形成时间尺度。关于环形特性与形成时间尺度的解析结果已通过particle-in-cell（粒子模拟）得到验证。所得到的动量分布具有动力学不稳定性，已知会在天体物理等离子体及实验室装置中引发相干辐射发射。
英文摘要：
Under the presence of strong electromagnetic fields and radiation reaction, plasmas develop anisotropic momentum distributions, characterized by a population inversion. This is a general property of collisionless plasmas when the radiation reaction force is taken into account. We study the case of a plasma in a strong magnetic field and demonstrate the development of ring momentum distributions. The timescales for ring formation are derived for this configuration. The analytical results for the ring properties and the timescales for ring formation are confirmed with particle-in-cell simulations. The resulting momentum distributions are kinetically unstable and are known to lead to coherent radiation emission in astrophysical plasmas and laboratory setups.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
