Li Yongdong,Liu Chunliang,Wang Hongguang
(Key Laboratory for Physical Electronics and Devices of the Ministry of Education,Xi'an Jiaotong University,Xi'an 710049,China)
Abstract:A fast particle-moving algorithm for particle-in-cell simulation of plasmas in polar coordinates system was proposed,in which the local rectangular coordinates approximation was used in the area near the position of the charged particle at every time step.By coordinate transformation,an explicit solution scheme of the particle motion equation was derived to avoid the error,which is always brought in the direct iteration process of the implicit algorithm under polar coordinates system,and enhances the computational efficiency.Numerical simulation results show that,compared with the implicit algorithm with 10－3 tolerance,the speed of the new explicit algorithm is increased to about 2 times for the whole particle-mover.The algorithm proposed can be used in 2.5-dimensional particle-in-cell simulation of longitudinal homogeneous plasmas and high-power microwave devices．
Keywords:particle-in-cell simulation;particle-mover;polar coordinates system;local rectangular coordinate