基于JASMIN并行框架的2.5维粒子模拟程序NEPTUNE2D的研制  

Developement on 2.5D electromagnetic and particle-in-cell code named NEPTUNE2D based on a massively adaptive parallel applications infrastructure named JASMIN

作　　者：张恒[1,2] 郝建红[1] 董烨[2,3] 董志伟[2] 杨温渊[2] 孙会芳[2] 

机构地区：[1]华北电力大学电气与电子工程学院,北京102206 [2]北京应用物理与计算数学研究所,北京100094 [3]西南交通大学物理科学与技术学院,成都610031

出　　处：《强激光与粒子束》2016年第3期34-40,共7页High Power Laser and Particle Beams

基　　金：国家自然科学基金项目(11305015;11475155)

摘　　要：介绍了2.5维自主研制的并行电磁粒子模拟程序NEPTUNE2D初步研发情况。该程序基于JASMIN并行自适应结构网格支撑框架研制,并行效能高,可扩展性强,且支持动态负载平衡;采用新型PIC算法替代传统算法,避免求解泊松方程修正电场,更适用于大规模并行计算;程序支持r-z坐标系下的器件仿真,可应用于高功率微波器件、电真空器件的快速模拟设计。该程序现已完成电磁场更新、粒子推进、电磁场注入/引出、粒子发射/吸收等基本物理功能模块的研制,并通过同轴线、圆波导、同轴二极管及无箔二极管算例模拟验证了模块的正确性。最后,应用NEPTUNE2D程序设计了一个高效同轴相对论返波管,给出了粒子模拟结果和并行性能测试结果。The development on a parallel 2.5D electromagnetic and particle-in-cell code named NEPTUNE2D is introduced preliminarily.The code is developed on the J parallel adaptive structured mesh applications infrastructure(JASMIN),with high parallel efficiency,strong expansibility and adaptive load-balance.A new PIC method is used instead of the classical one,which is more suitable for massively parallel simulation.This code can construct and simulate devices in the R-Z coordinate,and it is capable of fast simulation and design of high power microwave(HPM)devices and electron-vacuum tubes.At present,basic physical function modules are accomplished,such as electromagnetic field update,particle movement,electromagnetic wave input/output and particle injection/absorption.This code is verified and validated by simulations of a coaxial-line,a cylindrical waveguide,a coaxial diode and a foilless diode.Finally,by using this code,a CRBWO(coaxial relativistic backward wave oscillator)with high efficiency is designed and simulated.The physical figures are presented and parallel efficiency is given.

关 键 词：高功率微波 粒子模拟 并行计算 同轴相对论返波管 

分 类 号：O521.3[理学—高压高温物理]