An Implicit "Drift-Lorentz" Particle Mover for Plasma and Beam Simulations

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In order to efficiently perform particle simulations in systems with widely varying magnetization, we have developed a 'drift-Lorentz mover', which interpolates between full particle dynamics and drift kinetics in such a way as to preserve a physically correct gyroradius and particle drifts for both large and small ratios of the timestep to the cyclotron period. In order to extend applicability of the mover to systems with plasma frequency exceeding the cyclotron frequency - such as one may have with fully neutralized drift compression of a heavy ion beam - we have developed an implicit version of the mover. A first ... continued below

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Cohen, R H; Friedman, A; Grote, D P & Vay, J March 7, 2008.

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In order to efficiently perform particle simulations in systems with widely varying magnetization, we have developed a 'drift-Lorentz mover', which interpolates between full particle dynamics and drift kinetics in such a way as to preserve a physically correct gyroradius and particle drifts for both large and small ratios of the timestep to the cyclotron period. In order to extend applicability of the mover to systems with plasma frequency exceeding the cyclotron frequency - such as one may have with fully neutralized drift compression of a heavy ion beam - we have developed an implicit version of the mover. A first step in this direction, in which the polarization charge was added to the field solver, was described previously. Here we describe a fully implicit algorithm (which is analogous to the direct-implicit method for conventional particle-in-cell simulation), a stability analysis of it, its implementation in the WARP code, and several tests of the resultant code. The fully implemented version is electrostatic; we are beginning development of an electromagnetic version, and describe also the status of that effort.

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PDF-file: 3 pages; size: 80.5 Kbytes

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  • Presented at: 17th Heavy-Ion Inertial Fusion Symposium, Tokyo, Japan, Aug 03 - Aug 08, 2008

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  • Report No.: LLNL-CONF-402126
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 1041309
  • Archival Resource Key: ark:/67531/metadc840159

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  • March 7, 2008

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  • May 19, 2016, 3:16 p.m.

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  • Dec. 5, 2016, 8:46 p.m.

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Cohen, R H; Friedman, A; Grote, D P & Vay, J. An Implicit "Drift-Lorentz" Particle Mover for Plasma and Beam Simulations, article, March 7, 2008; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc840159/: accessed October 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.