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Pegasus: A new hybrid-kinetic particle-in-cell code for astrophysical plasma dynamics

Author(s): Kunz, Matthew W; Stone, James M; Bai, XN

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Abstract: We describe Pegasus, a new hybrid-kinetic particle-in-cell code tailored for the study of astrophysical plasma dynamics. The code incorporates an energy-conserving particle integrator into a stable, second-order-accurate, three-stage predictor-predictor-corrector integration algorithm. The constrained transport method is used to enforce the divergence-free constraint on the magnetic field. A δf scheme is included to facilitate a reduced-noise study of systems in which only small departures from an initial distribution function are anticipated. The effects of rotation and shear are implemented through the shearing-sheet formalism with orbital advection. These algorithms are embedded within an architecture similar to that used in the popular astrophysical magnetohydrodynamics code Athena, one that is modular, well-documented, easy to use, and efficiently parallelized for use on thousands of processors. We present a series of tests in one, two, and three spatial dimensions that demonstrate the fidelity and versatility of the code. © 2013 Elsevier Inc.
Publication Date: 15-Feb-2014
Citation: Kunz, MW, Stone, JM, Bai, XN. (2014). Pegasus: A new hybrid-kinetic particle-in-cell code for astrophysical plasma dynamics. Journal of Computational Physics, 259 (154 - 174. doi:10.1016/j.jcp.2013.11.035
DOI: doi:10.1016/j.jcp.2013.11.035
ISSN: 0021-9991
EISSN: 1090-2716
Pages: 154-174
Type of Material: Journal Article
Journal/Proceeding Title: Journal of Computational Physics
Version: Author's manuscript



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