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Iterative addition of kinetic effects to linear fluid simulation of radio-frequency heating.

Author: David L Green
Requested Type: Poster Only
Submitted: 2015-03-11 08:19:48

Co-authors: L.A. Berry

Contact Info:
ORNL
PO Box 2008 Bethel Valley Road
Oak Ridge, TN   37831-6
USA

Abstract Text:
Here we present a novel approach to calculating the kinetic response of the plasma to applied radio-frequency power. In previous work we have demonstrated [2] 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 [3]. The solution method targets high fidelity simulation such that the parallel scaling and data-locality of the algorithm were driving factors during the algorithm development. Here we describe the method, and present progress on the inclusion of perpendicular kinetics.

[2] D. L. Green and L. A. Berry, “Iterative addition of parallel temperature effects to finite-difference simulation of radio-frequency wave propagation in plasmas”, Comp. Phys. Comm., 185(3), pg. 736-743 (2014); doi:10.1016/j.cpc.2013.10.032
[3] D. L. Green and L. A. Berry, “Investigating stationary phase violations in kinetic RF simulation of real plasmas”, http://meetings.aps.org/link/BAPS.2013.DPP.BP8.70

This research used resources of the OLCF at ORNL, which is supported by the Office of Science of the U.S. Department of Energy under Contract No. DE-AC05-00OR22725.

Comments:
Plasma Production and Heating