Journal Article

PUBDB-2020-02518

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Scalable Spectral Solver in Galilean Coordinates for Eliminating the Numerical Cherenkov Instability in Particle-in-Cell Simulations of Streaming Plasmas

Kirchen, M. (Corresponding author)CFEL*Extern* ; Maier, A.CFEL*Extern*DESY* ; Lehe, R. ; Jalas, S.CFEL*Extern* ; Shapoval, O. ; Vay, J.-L.

2020
Inst. Woodbury, NY

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Please use a persistent id in citations: doi:10.1103/PhysRevE.102.013202  doi:10.3204/PUBDB-2020-02518

Abstract: Discretizing Maxwell's equations in Galilean (comoving) coordinates allows the derivation of a pseudospectral solver that eliminates the numerical Cherenkov instability for electromagnetic particle-in-cell simulations of relativistic plasmas flowing at a uniform velocity. Here we generalize this solver by incorporating spatial derivatives of arbitrary order, thereby enabling efficient parallelization by domain decomposition. This allows scaling of the algorithm to many distributed compute units. We derive the numerical dispersion relation of the algorithm and present a comprehensive theoretical stability analysis. The method is applied to simulations of plasma acceleration in a Lorentz-boosted frame of reference.

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Contributing Institute(s):

1. Supraleitende Beschleuniger Technologie (MSL)
2. UNI/EXP (CFEL-LUX)

Research Program(s):

1. 631 - Accelerator R & D (POF3-631) (POF3-631)

Experiment(s):

1. No specific instrument

Appears in the scientific report 2020

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Database coverage:
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