δf and particle simulations of parametric instabilities

G. Dipeso, E. C. Morse, R. W. Ziolkowski

Research output: Contribution to journalArticle

9 Scopus citations

Abstract

The δf and particle simulation methods are presented and compared for parametric instabilities in a 1D unmagnetized plasma. The δf simulation method used here is based on the linearized Vlasov equation. The simulation growth rates from both methods roughly agree with growth rates obtained from a fluid theory. Doubling the number of characteristics in the δf simulations does not significantly alter the growth rates. Doubling the number of particles in the particle simulation does alter the growth rates indicating that particle noise is interfering with the physics. The δf simulation method was also compared to Vlasov theory for parametric instabilities in a ID magnetized plasma. The simulations generally agree with the theory.

Original languageEnglish (US)
Pages (from-to)325-338
Number of pages14
JournalJournal of Computational Physics
Volume96
Issue number2
DOIs
StatePublished - Oct 1991

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ASJC Scopus subject areas

  • Numerical Analysis
  • Modeling and Simulation
  • Physics and Astronomy (miscellaneous)
  • Physics and Astronomy(all)
  • Computer Science Applications
  • Computational Mathematics
  • Applied Mathematics

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