Collisional effects on relativistic electron beam transport through high-density magnetized plasma are studied numerically and theoretically. An electron beam injected into cold high-density plasma induces the Weibel instability generating magnetic field components transverse to the direction of beam propagation. This field scatters the beam electrons. While an applied magnetic field suppresses the instability, collisions in the background plasma enhance the instability. This interesting result is verified by a dispersion relation derived based on a set of two fluid equations. We give a physical interpretation using a simple theoretical model. We also analyze the nonlinear evolution of the collisional magnetized beam-plasma interaction using a hybrid simulation code. As a result, it is found that a large scale structure is produced in the collisional plasma by an enhanced induced longitudinal electric field.

通过数值和理论研究了碰撞对高密度磁化等离子体中相对论电子束传输的影响。注入冷高密度等离子体中的电子束会诱发Weibel不稳定性，从而产生横向于束传播方向的磁场分量。该场散射电子束。在施加的磁场抑制不稳定性的同时，背景等离子体中的碰撞增强了不稳定性。通过基于两个流体方程组得出的色散关系可以验证这一有趣的结果。我们使用简单的理论模型进行物理解释。我们还使用混合仿真代码分析了碰撞磁化束-等离子体相互作用的非线性演化。结果是，