GPU enabled kinetic effects in radio-frequency heating simulation*

In previous work we have demonstrated [1] the iterative addition of parallel kinetic effects to finite-difference frequency-domain simulation of radio-frequency (RF) wave propagation in fusion relevant plasmas. Such iterative addition in configuration space bypasses several of the difficulties with traditional spectral methods for kinetic RF simulation when applied to problems that exhibit non-periodic geometries. Furthermore, the direct numerical integration of particle trajectories in real magnetic field geometries removes violations of the stationary phase approximation inherent in the spectral approach [2]. Here we extend this method to include perpendicular kinetics by relying on the massively parallel capability of GPUs to enable resolution of 3 velocity-space dimensions. We present results for a mode converted ion Bernstein wave scenario in 1-space plus 3-velocity dimensions case relevant to fusion plasmas. \\[4pt] [1] D. L. Green and L. A. Berry, Comp. Phys. Comm., 185(3), pg. 736-743 (2014); doi:10.1016/j.cpc.2013.10.032\\[0pt] [2] D. L. Green and L. A. Berry, http://meetings.aps.org/link/BAPS.2013.DPP.BP8.70