Study of discrete-particle effects in a one-dimensional plasma simulation with the Krook type collision model

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题名:	Study of discrete-particle effects in a one-dimensional plasma simulation with the Krook type collision model
作者:	陳騮;Lai, Po-Yen;Chen, Liu;Institute for Fusion Theory and Simulation, Zhejiang University, 310027 Hangzhou;Lin-Liu, Y. R.;Chen, Shih-Hung;Center for Mathematics and Theoretical Physics, National Central University, Jhongli 32001, Taiwan
贡献者:	理學院物理學系
关键词:	70 PLASMA PHYSICS AND FUSION TECHNOLOGY;COLLISIONS;DEBYE LENGTH;KINETIC EQUATIONS;ONE-DIMENSIONAL CALCULATIONS;PLASMA;PLASMA SIMULATION;RELAXATION TIME;TEST PARTICLES
日期:	2015-09-01
上传时间:	2026-04-23 14:29:35 (UTC+8)
出版者:	United States
摘要:	摘要： The thermal relaxation time of a one-dimensional plasma has been demonstrated to scale with N{sub D}{sup 2} due to discrete particle effects by collisionless particle-in-cell (PIC) simulations, where N{sub D} is the particle number in a Debye length. The N{sub D}{sup 2} scaling is consistent with the theoretical analysis based on the Balescu-Lenard-Landau kinetic equation. However, it was found that the thermal relaxation time is anomalously shortened to scale with N{sub D} while externally introducing the Krook type collision model in the one-dimensional electrostatic PIC simulation. In order to understand the discrete particle effects enhanced by the Krook type collision model, the superposition principle of dressed test particles was applied to derive the modified Balescu-Lenard-Landau kinetic equation. The theoretical results are shown to be in good agreement with the simulation results when the collisional effects dominate the plasma system. 出版者： United States 出版日期： 2015-09-15 出處： Physics of plasmas, 2015-09, Vol.22 (9) 資源來源： American Institute of Physics Journals 識別號： ISSN: 1070-664X 識別號： EISSN: 1089-7674 識別號： DOI: 10.1063/1.4931741
显示于类别:	[物理學系] 期刊論文

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