Nonequilibrium Gyrokinetic Fluctuation Theory and Sampling Noise in Gyrokinetic Particle-in-cell Simulations

[摘要] The present state of the theory of fluctuations in gyrokinetic GK plasmas and especially its application to sampling noise in GK particle-in-cell PIC simulations is reviewed. Topics addressed include the Δf method, the fluctuation-dissipation theorem for both classical and GK many-body plasmas, the Klimontovich formalism, sampling noise in PIC simulations, statistical closure for partial differential equations, the theoretical foundations of spectral balance in the presence of arbitrary noise sources, and the derivation of Kadomtsev-type equations from the general formalism.

[发布日期] 2007-10-09

[学科分类] 原子、分子光学和等离子物理

[关键词] CLOSURES;FLUCTUATIONS;PARTIAL DIFFERENTIAL EQUATIONS;SAMPLING Computer Simulation;Gyrokinetic EquationsTurbulence