| 等离子体粒子模拟带电粒子推进算法校正 |
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| 引用本文： | 李永东,刘纯亮,张殿辉,王建国. 等离子体粒子模拟带电粒子推进算法校正[J]. 核技术, 2005, 28(4): 269-272 |
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| 作者姓名： | 李永东 刘纯亮 张殿辉 王建国 |
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| 作者单位： | 西安交通大学电子物理与器件教育部重点实验室,西安,710049;西北核技术研究所,西安,710024 |
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| 基金项目： | 国家863计划803主题资助课题 |
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| 摘 要： | 结合带电粒子回旋运动、漂移运动和螺旋一漂移运动三种典型的运动方式，对现有等离子体粒子模拟的粒子推进算法进行了数值试验和误差分析，通过校正差分格式中的回旋系数和半加速系数，得到了一套完整的校正算法。该校正算法不仅提高了计算精度，而且在确保数值稳定性的前提下降低了对粒子模拟时间步长的要求，从而显著提高计算效率，特别适用于强磁场大尺寸等离子体器件的模拟。
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| 关 键 词： | 等离子体 粒子模拟 粒子推进 时间步长 |
Correction of particle-moving algorithm for particle-in-cell simulation of plasma |
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| LI Yongdong,LIU Chunliang,ZHANG Dianhui,WANG Jianguo. Correction of particle-moving algorithm for particle-in-cell simulation of plasma[J]. Nuclear Techniques, 2005, 28(4): 269-272 |
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| Authors: | LI Yongdong LIU Chunliang ZHANG Dianhui WANG Jianguo |
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| Affiliation: | LI Yongdong1 LIU Chunliang1 ZHANG Dianhui2 WANG Jianguo2 1 |
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| Abstract: | The conventional particle-moving algorithm for particle-in-cell simulation of plasma is investigated by numerical experiments, which are conducted in three typical fashions of the charged particle motions in electromagnetic fields, that is, cyclotron, drift and spiral drift. The origins of numerical error are identified, and then eliminated by correcting the cyclotron coefficient and half-accelerating coefficient of the finite difference scheme. The corrected algorithm not only improves the accuracy but also relaxes the time step condition for the simulation. It can increase the computation efficiency, especially for large-scale plasma devices with strong magnetic fields. |
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| Keywords: | Plasma Particle-in-cell simulation Particle-moving Time step |
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