论文标题
碰撞对温度各向异性的产生和抑制的影响和芯片不稳定性的影响
The effects of collisions on the generation and suppression of temperature anisotropies and the Weibel instability
论文作者
论文摘要
使用非平行温度和密度梯度的等离子体扩展，以及通过Biermann电池的磁场生成，使用包括通过蒙特卡洛方法碰撞效应的粒子模拟对磁场进行建模。碰撞程度的缩放表明，可以产生各向异性，并驱动微生的不稳定性，以使梯度尺度短于平均自由路径。对于较大的碰撞速率，Biermann电池是磁场产生的原因。当最有能量的颗粒保持无碰撞时，Nern的效果会导致Biermann场随热通量拖动，堆积并增强。
The expansion of plasma with non-parallel temperature and density gradients, and the generation of magnetic field via the Biermann battery is modeled using particle-in-cell simulations that include collisional effects via Monte Carlo methods. A scaling of the degree of collisionality shows that an anisotropy can be produced, and drive the Weibel instability, for gradient scales shorter than the mean free path. For larger collision rates, the Biermann battery dominates as the cause of magnetic field generation. When the most energetic particles remain collisionless, the Nernst effect causes the Biermann field to be dragged with the heat flux, piled up, and enhanced.
