空间电荷波传播特性的PIC粒子模拟

采用周期性边界条件的二维准静电PIC粒子模拟程序对空间电荷波的产生及传播过程进行了数值模拟，给出了静止和一维定向漂移空间电荷波的产生及传播特性随等离子体参数变化的关系，通过单电子跟踪的方法，得到了波动过程带电粒子的空间状态的变化规律。其结果，将作为进一步实现空间电荷波与电磁波产生波一波相互作用过程模拟的基础。

The PIC Simulation of the Space Charge Wave in Plasmas

Space charge wave, which has direct effect on the physical process among plasmas, is one of the basic waves in plasmas. The two-dimensional electrostatic Particle-In-Cell （PIC） simulation program with periodic boundary condition is performed to make numerical simulation of the production and diffusion of space charge wave. The relations between the diffusion characteristics of the space charge wave in one-dimensional stationary drifting plasmas and plasma parameters are given. By using the single-electron tracking method, variation of the space states of charged particles in plasmas is obtained. The results will be the basis of further simulations for the wave-wave interaction process between space charge wave and electromagnetic wave.