| 粒子模拟中的一种高频噪声抑制算法 |
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| 引用本文： | 刘大刚,周俊,杨超,蒙林. 粒子模拟中的一种高频噪声抑制算法[J]. 计算物理, 2011, 28(2): 243-249 |
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| 作者姓名： | 刘大刚 周俊 杨超 蒙林 |
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| 作者单位： | 电子科技大学物理电子学院, 四川 成都 610054 |
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| 摘 要： | 对粒子模拟中的高频噪声的产生机理进行分析,并给出一种既能对高频数值噪声进行过滤又能满足Q值较高的相对论型微波器件计算要求的时域有限差分(FDTD)算法——High_Q FDTD算法.在中心差分FDTD算法和时偏FDTD算法的基础上,给出High_Q算法的计算公式,并着重分析算法的稳定性与收敛性.通过对相对论返波管(RBWO)的计算,将计算结果与中心差分和时偏FDTD算法的计算结果比较,验证算法有较好的滤波特性和计算精度.
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| 关 键 词： | 粒子模拟 FDTD算法 高频噪声 相对论粒子 |
| 收稿时间： | 2010-03-05 |
| 修稿时间： | 2010-08-05 |
An Arithmetic for Filtrating High-frequency Noise in Particle-in-cell Simulation |
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| LIU Dagang,ZHOU Jun,YANG Chao,MENG Lin. An Arithmetic for Filtrating High-frequency Noise in Particle-in-cell Simulation[J]. Chinese Journal of Computational Physics, 2011, 28(2): 243-249 |
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| Authors: | LIU Dagang ZHOU Jun YANG Chao MENG Lin |
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| Affiliation: | School of Physical Electronics, University of Electronics Science and Technology of China, Chengdu 610054, China |
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| Abstract: | Mechanism of high-frequency noise in particle-in-cell(PIC) simulation is analysed.An effective finite-difference time-domain(FDTD) method called High_Q FDTD method is developed in which high-frequency noise is filtrated and high quality factor device is calculated with PIC simulation.Formulation of the method is derived on the basis of time-biased and centered-difference FDTD method.Stability and convergence of this method are well analysed.Filter efficiency and calculation precion of this method are compar... |
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| Keywords: | PIC simulation FDTD method high-frequency noise relativistic particles |
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