| 一种补偿时间步长限制的粒子模拟-蒙特卡罗碰撞模型 |
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| 引用本文： | 李永东, 王洪广, 刘纯亮, 等. 一种补偿时间步长限制的粒子模拟-蒙特卡罗碰撞模型[J]. 强激光与粒子束, 2009, 21(11). |
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| 作者姓名： | 李永东 王洪广 刘纯亮 周岩 刘美琴 |
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| 作者单位： | 1.西安交通大学 电子物理与器件教育部重点实验室, 西安 71 0049 |
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| 基金项目： | 国家自然科学基金项目 |
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| 摘 要： | 从碰撞次数的概率分布出发，推导出一种补偿蒙特卡罗碰撞模型，采用以正态分布计算得到的平均碰撞次数作为碰撞概率，来补偿传统方法中忽略的多次碰撞。通过模拟不同折合电场强度条件下He气放电产生电子的运动规律，验证了补偿蒙特卡罗碰撞模型的正确性。计算结果表明:补偿蒙特卡罗碰撞模型可以有效地提高计算效率，特别适用于高气压气体放电现象的粒子模拟。
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| 关 键 词： | 粒子模拟 蒙特卡罗碰撞模型 时间步长限制 气体放电 |
| 收稿时间： | 1900-01-01; |
Compensated particle in cell-Monte Carlo collision modelwith wide time step limit |
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| li yongdong, wang hongguang, liu chunliang, et al. Compensated particle in cell-Monte Carlo collision model with wide time step limit[J]. High Power Laser and Particle Beams, 2009, 21. |
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| Authors: | Li Yongdong Wang Hongguang Liu Chunliang Zhou Yan Liu Meiqin |
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| Affiliation: | 1. Key Laboratory for Physical Electronics and Devices of the Ministry of Education,Xi’an Jiaotong University,Xi’an 710049,China |
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| Abstract: | A compensated Monte-Carlo collision model(CMCC) was proposed, which took the average collision times computed from normal distribution as the probability of single particle collision during a time step. Hereby the ignored multi-time collisions were compensated by additive single collisions. The electron motion in discharged He gas was simulated with CMCC model on different reduced field conditions. Simulation results showed that CMCC model with long time step got the same electron velocity distribution and temperature as conventional MCC model with short time step. It was proved that the CMCC model had high efficiency especially for PIC simulation of high pressure gas discharges. |
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| Keywords: | particle-in-cell simulation Monte-Carlo collision model time step limit gas discharge |
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