时间分步平均法求解1D LPIC中的电流密度  

Time step average method for solving current density in one-dimensional LPIC program

作　　者：李梦超 郭勇 荣垂才 陈维[1] 黄骏[1] 王兴权[1] LI Meng-chao;GUO Yong;RONG Chui-cai;CHEN Wei;HUANG Jun;WANG Xing-quan(Institute of Low Temperature Plasma Technology,Gannan Normal University,Ganzhou 341000)

机构地区：[1]赣南师范大学低温等离子体技术研究所,赣州341000

出　　处：《核聚变与等离子体物理》2024年第4期491-496,共6页Nuclear Fusion and Plasma Physics

基　　金：国家自然科学基金(22061002,52067002);江西省教育厅科学技术研究项目(GJJ211411)。

摘　　要：在一维(1D)的激光等离子体仿真(LPIC)中,提出了一种针对粒子有效停留时间、对格点附近不同位置的粒子采用不同的分配权重进行分步求解的时间分步平均方法,即在格点分布方向(激光传播方向,x方向)电流密度由电流连续性方程求出,在垂直方向(y与z方向),用时间分步平均法求解电荷平均密度ρ,然后利用J_(y)=ρv_(y)和J_(z)=ρv_(z)求解电流密度的方法。在粒子云一阶权重分配的情况下,该方法得到的电流密度与大多数LPIC一阶电流密度一致。In one-dimensional(1D)Laser plasma interaction simulation via Particle In Cell code(LPIC),a time-step averaged method is proposed to solve the particle weight assignment in different positions near the grid according to the effective residence time of particles.The current density in the grid distribution direction(laser propagation x direction)is calculated by the current continuity equation,and in the vertical(y,z)direction,the average density of particles is calculated by the time-step averaged method,and then the current density is calculated by J_(y)=ρv_(y)=and J_(z)=ρv_(z) in 1D LPIC program.In the case of first-order weight distribution of particle cloud,the current density obtained by this method is consistent with the first-order current density of most LPIC codes.

关 键 词：激光等离子体仿真 电流密度 激光尾波场 激光电子加速 

分 类 号：TL612.12[核科学技术—核技术及应用]