Particle-in-cell Simulations with Kinetic Electrons

Lewandowski, J.L.V.

Princeton University. Plasma Physics Laboratory.

关键词: Numerical Simulation;    Scalar Fields;    70 Plasma Physics And Fusion Technology;    Geometry;    Stellarators;   

DOI  :  10.2172/821523
RP-ID  :  PPPL-3923
RP-ID  :  AC02-76CH03073
RP-ID  :  821523

美国|英语

来源: UNT Digital 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 multi-grid 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.