Particle-in-cell Simulations with Kinetic Electrons.

Lewandowski, J. L. V.

Technical Information Center Oak Ridge Tennessee

关键词: Kinetic equations;    Electrons;    Multigrid methods;    Adiabatic conditions;    Toroidal geometry;   

RP-ID  :  DE2004821523

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

A new scheme, based on an exact separation between adiabatic and nonadiabatic electron responses, for particle-in-cell (PIC) simulations of drift-type modes is presented. The (linear and nonlinear) elliptic equations for the scalar fields are solved using a multigrid solver. The new scheme yields linear growth rates in excellent agreement with theory and it is shown to conserve energy well into the nonlinear regime. It is also demonstrated that simulations with few electrons are reliable and accurate, suggesting that large-scale, PIC simulations with electron dynamics in toroidal geometry (e.g. tokamaks and stellarators plasmas) are within reach of present-day massively-parallel supercomputers.