EZ: An efficient, charge conserving current deposition algorithm for electromagnetic particle-in-cell simulations

Publikation: Beitrag in FachzeitschriftForschungsartikelBeigetragenBegutachtung

Beitragende

  • Klaus Steiniger - , Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Center for Advanced Systems Understanding (CASUS) (Autor:in)
  • Rene Widera - , Helmholtz-Zentrum Dresden-Rossendorf (HZDR) (Autor:in)
  • Sergei Bastrakov - , Helmholtz-Zentrum Dresden-Rossendorf (HZDR) (Autor:in)
  • Michael Bussmann - , Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Center for Advanced Systems Understanding (CASUS) (Autor:in)
  • Sunita Chandrasekaran - , University of Delaware (Autor:in)
  • Benjamin Hernandez - , Oak Ridge National Laboratory (Autor:in)
  • Kristina Holsapple - , University of Delaware (Autor:in)
  • Axel Huebl - , Lawrence Berkeley National Laboratory (Autor:in)
  • Guido Juckeland - , Helmholtz-Zentrum Dresden-Rossendorf (HZDR) (Autor:in)
  • Jeffrey Kelling - , Helmholtz-Zentrum Dresden-Rossendorf (HZDR) (Autor:in)
  • Matt Leinhauser - , University of Delaware (Autor:in)
  • Richard Pausch - , Helmholtz-Zentrum Dresden-Rossendorf (HZDR) (Autor:in)
  • David Rogers - , Oak Ridge National Laboratory (Autor:in)
  • Ulrich Schramm - , Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Technische Universität Dresden (Autor:in)
  • Jeff Young - , Georgia Institute of Technology (Autor:in)
  • Alexander Debus - , Helmholtz-Zentrum Dresden-Rossendorf (HZDR) (Autor:in)

Abstract

We present EZ, a novel current deposition algorithm for particle-in-cell (PIC) simulations. EZ calculates the current density on the electromagnetic grid due to macro-particle motion within a time step by solving the continuity equation of electrodynamics. Being a charge conserving hybridization of Esirkepov's method and ZigZag, we refer to it as “EZ” as shorthand for “Esirkepov meets ZigZag”. Simulations of a warm, relativistic plasma with PIConGPU show that EZ achieves the same level of charge conservation as the commonly used method by Esirkepov, yet reaches higher performance for macro-particle assignment-functions up to third-order. In addition to a detailed description of the functioning of EZ, reasons for the expected and observed performance increase are given, and guidelines for its implementation aiming at highest performance on GPUs are provided.

Details

OriginalspracheEnglisch
Aufsatznummer108849
FachzeitschriftComputer physics communications
Jahrgang291
PublikationsstatusVeröffentlicht - Okt. 2023
Peer-Review-StatusJa

Schlagworte

Schlagwörter

  • Charge conservation, Current deposition, EZ, Particle-in-cell, PIConGPU