时间分步平均法求解 1D LPIC 中的电流密度

doi:10.16568/j.0254-6086.202404018

核工业西南物理研究院 ›› 2024, Vol. 44 ›› Issue (4): 491-496.DOI: 10.16568/j.0254-6086.202404018

• 等离子体物理 • 上一篇

时间分步平均法求解 1D LPIC 中的电流密度

李梦超，郭勇，荣垂才，陈维，黄骏，王兴权

(赣南师范大学低温等离子体技术研究所，赣州 341000)

收稿日期:2022-08-16 修回日期:2024-08-01 出版日期:2024-12-15 发布日期:2024-12-12
作者简介:李梦超(1988-)，男，山东聊城人，讲师，博士，从事超快电子衍射、激光等离子体相互作用仿真研究。
基金资助:
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)

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

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)

Received:2022-08-16 Revised:2024-08-01 Online:2024-12-15 Published:2024-12-12

摘要/Abstract

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。

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

Abstract:

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= ρy_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.

Key words: Laser plasma simulation, Current density, Laser wake field, Laser electron acceleration;

中图分类号:

TL61+2.12

李梦超, 郭勇, 荣垂才, 陈维, 黄骏, 王兴权. 时间分步平均法求解 1D LPIC 中的电流密度[J]. 核工业西南物理研究院, 2024, 44(4): 491-496.

LI Meng-chao, GUO Yong, RONG Chui-cai, CHEN Wei, HUANG Jun, WANG Xing-quan. Time step average method for solving current density in one-dimensional LPIC program[J]. Nuclear Fusion and Plasma Physics, 2024, 44(4): 491-496.

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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

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