Improved multispecies Dougherty collisions

Abstract

The Dougherty model Fokker-Planck operator is extended to describe nonlinear full-f collisions between multiple species in plasmas. Simple relations for cross-species interactions are developed which obey conservation laws, and reproduce familiar velocity and temperature relaxation rates. This treatment of multispecies Dougherty collisions, valid for arbitrary mass ratios, satisfies the H-Theorem unlike analogous Bhatnagar-Gross-Krook operators.

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Cited by in corpus (5)

• Local Gyrokinetic Collisional Theory of the Ion-Temperature Gradient Mode
• Numerical Implementation of the Improved Sugama Collision Operator Using a Moment Approach
• An investigation of shock formation versus shock mitigation of colliding plasma jets
• A Parallel-Kinetic-Perpendicular-Moment Model for Magnetized Plasmas
• Reduction of transport due to magnetic shear in gyrokinetic simulations of the scrape-off layer