Improved Unlike-Particle Collision Operator for delta-f Drift-Kinetic Particle Simulations
R. A. Kolesnikov 1*, W. X. Wang 2, F. L. Hinton 31 Los Alamos National Laboratory, Los Alamos, NM 87544, USA.
2 Plasma Physics Laboratory, P.O. Box 451, Princeton, NJ 08543, USA.
3 Center for Astrophysics and Space Science, University of California, San Diego, La Jolla, CA 92093, USA.
Received 9 April 2010; Accepted (in revised version) 26 April 2010
Available online 27 August 2010
Plasmas in modern tokamak experiments contain a significant fraction of impurity ion species in addition to main deuterium background. A new unlike-particle collision operator for $\delta f$ particle simulation has been developed to study the non-local effects of impurities due to finite ion orbits on neoclassical transport in toroidal plasmas. A new algorithm for simulation of cross-collisions between different ion species includes test-particle and conserving field-particle operators. An improved field-particle operator is designed to exactly enforce conservation of number, momentum and energy.
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PACS: 52.30.Gz, 52.25.Xz, 52.25.Dg
Key words: Drift-kinetics, magnetized plasmas.
Email: firstname.lastname@example.org (R. A. Kolesnikov), email@example.com (W. X. Wang), firstname.lastname@example.org (F. L. Hinton)