论文标题
部分可观测时空混沌系统的无模型预测
Radiation reaction cooling as a source of anisotropic momentum distributions with inverted populations
论文作者
论文摘要
在强烈的电磁场和辐射反应的存在下，等离子体发展为各向异性动量分布，其特征是种群反演。当考虑辐射反应力时，这是无碰撞等离子体的一般特性。我们研究了强磁场中血浆的情况，并证明了环动量分布的发展。为此配置得出了环形形成的时间尺度。通过粒子中的模拟，确认了环特性和环形形成的时间尺度的分析结果。所得的动量分布在动力学上是不稳定的，已知会导致天体物理等离子体和实验室设置的相干辐射发射。
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.
