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How to improve the diagnosis of kinetic energy in δf PIC codes

✍ Scribed by S. Hess; F. Mottez

Publisher: Elsevier Science
Year: 2009
Tongue: English
Weight: 586 KB
Volume: 228
Category: Article
ISSN: 0021-9991
DOI: 10.1016/j.jcp.2009.05.035

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✦ Synopsis

This paper propose to analyse the effect of the shape factor that is used in plasma PIC df codes to make interpolations between the grid and the particles positions. In df codes, the total density fluctuates, even when it should be conserved. We show that, in some cases, the computed non-physical part of the particle kinetic energy fluctuations is dependent on those of the total density. We deduce a method that can reduce drastically the statistical fluctuations in the diagnostics of the kinetic energy.

Published by Elsevier Inc.

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