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首页> 外文期刊>Computational mathematics and mathematical physics >Simulation of collisionless ultrarelativistic electron-proton plasma dynamics in a self-consistent electromagnetic field
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Simulation of collisionless ultrarelativistic electron-proton plasma dynamics in a self-consistent electromagnetic field

机译：自洽电磁场中无碰撞超相对论电子质子等离子体动力学的仿真

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摘要

The evolution of a collisionless electron-proton plasma in the self-consistent approximation is investigated. The plasma is assumed to move initially as a whole in a vacuum with the Lorentz factor. The behavior of the dynamical system is analyzed by applying a three-dimensional model based on the Vlasov-Maxwell equations with allowance for retarded potentials. It is shown that the analysis of the solution to the problem is not valid in the "center-of-mass frame" of the plasmoid (since it cannot be correctly defined for a relativistic plasma interacting via an electromagnetic field) and the transition to a laboratory frame of reference is required. In the course of problem solving, a chaotic electromagnetic field is generated by the plasma particles. As a result, the particle distribution functions in the phase space change substantially and differ from their Maxwell-Juttner form. Computations show that the kinetic energies of the electron and proton components and the energy of the self-consistent electromagnetic field become identical. A tendency to the isotropization of the particle momentum distribution in the direction of the initial plasmoid motion is observed.
机译：研究了自洽近似中无碰撞电子质子等离子体的演化。假定等离子体最初在具有洛伦兹因子的真空中整体上运动。通过应用基于Vlasov-Maxwell方程的三维模型来分析动力学系统的行为，并考虑了延迟电位。结果表明，对该问题的解决方案的分析在等离子的“质心框架”中无效（因为对于通过电磁场相互作用的相对论性等离子体无法正确定义）需要实验室参考框架。在解决问题的过程中，等离子体粒子会产生混沌电磁场。结果，相空间中的粒子分布函数发生了很大变化，并且不同于它们的麦克斯韦-贾特纳形式。计算表明，电子和质子成分的动能与自洽电磁场的能量相同。观察到粒子动量分布在初始等离子体运动方向上各向同性的趋势。

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