Low-noise Collision Operators for Particle-in-cell Simulations

Lewandowski, J.L.V.

Princeton University. Plasma Physics Laboratory.

关键词: Simulation Monte Carlo Methods;    Monte Carlo Methods;    70 Plasma Physics And Fusion Technology;    Lagrangian Function;    Energy Conservation;   

DOI  :  10.2172/837853
RP-ID  :  PPPL-4056
RP-ID  :  AC02-76CH03073
RP-ID  :  837853

美国|英语

来源: UNT Digital Library

【 摘 要 】

A new method to implement low-noise collision operators in particle-in-cell simulations is presented. The method is based on the fact that relevant collision operators can be included naturally in the Lagrangian formulation that exemplifies the particle-in-cell simulation method. Numerical simulations show that the momentum and energy conservation properties of the simulated plasma associated with the low-noise collision operator are improved as compared with standard collision algorithms based on random numbers.