中国物理B ›› 2023, Vol. 32 ›› Issue (12): 125204-125204.doi: 10.1088/1674-1056/acf449
Haiyun Tan(谭海云)1,2, Tianyuan Huang(黄天源)1,2, Peiyu Ji(季佩宇)2,3, Mingjie Zhou(周铭杰)1,2, Lanjian Zhuge(诸葛兰剑)4, and Xuemei Wu(吴雪梅)1,2,†
Haiyun Tan(谭海云)1,2, Tianyuan Huang(黄天源)1,2, Peiyu Ji(季佩宇)2,3, Mingjie Zhou(周铭杰)1,2, Lanjian Zhuge(诸葛兰剑)4, and Xuemei Wu(吴雪梅)1,2,†
摘要: The direct implicit particle-in-cell is a powerful kinetic method for researching plasma characteristics. However, it is time-consuming to obtain the future electromagnetic field in such a method since the field equations contain time-dependent matrix coefficients. In this work, we propose to explicitly push particles and obtain the future electromagnetic field based on the information about the particles in the future. The new method retains the form of implicit particle pusher, but the future field is obtained by solving the traditional explicit equation. Several numerical experiments, including the motion of charged particle in electromagnetic field, plasma sheath, and free diffusion of plasma into vacuum, are implemented to evaluate the performance of the method. The results demonstrate that the proposed method can suppress finite-grid-instability resulting from the coarse spatial resolution in electron Debye length through the strong damping of high-frequency plasma oscillation, while accurately describe low-frequency plasma phenomena, with the price of losing the numerical stability at large time-step. We believe that this work is helpful for people to research the bounded plasma by using particle-in-cell simulations.
中图分类号: (High-frequency and RF discharges)