Improved intra-species collision models for PIC simulations Metadata

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Title

  • Main Title Improved intra-species collision models for PIC simulations

Creator

  • Author: Jones, Michael E.
    Creator Type: Personal
  • Author: Lemons, Don S.
    Creator Type: Personal
  • Author: Winske, Dan
    Creator Type: Personal

Contributor

  • Sponsor: United States. Department of Energy.
    Contributor Type: Organization
    Contributor Info: USDOE, Washington, DC (United States)

Publisher

  • Name: Los Alamos National Laboratory
    Place of Publication: New Mexico
    Additional Info: Los Alamos National Lab., NM (United States)

Date

  • Creation: 1998-07-01

Language

  • English

Description

  • Content Description: In recent years, the authors have investigated methods to improve the effectiveness of modeling collisional processes in particle-in-cell codes. Through the use of generalized collision models, plasma dynamics can be followed both in the regime of nearly collisionless plasmas as well as in the hydrodynamic limit of collisional plasmas. They have developed a collision-field method to treat both the case of collisions between unlike plasma species (inter-species collisions), through the use of a deterministic, grid-based force, and between particles of the same species (intra-species collisions), through the use of a Langevin equation. While the approach used for inter-species collisions is noise-free in that the collision experienced by a particle does not require any random numbers, such random numbers are used for intra-species collisions. This gives rise to a stochastic cooling effect inherent in the Langevin approach. In this paper, the authors concentrate on intra-species collisions and describe how the accuracy of the model can be improved by appropriate corrections to velocity and spatial moments.
  • Physical Description: 4 p.

Subject

  • Keyword: Langevin Equation
  • STI Subject Categories: 70 Plasma Physics And Fusion
  • Keyword: Plasma Simulation
  • Keyword: Collisional Plasma
  • STI Subject Categories: 66 Physics
  • Keyword: Accuracy
  • Keyword: Corrections

Source

  • Conference: 16. international conference on numerical simulation of plasmas, Goleta, CA (United States), 10-12 Feb 1998

Collection

  • Name: Office of Scientific & Technical Information Technical Reports
    Code: OSTI

Institution

  • Name: UNT Libraries Government Documents Department
    Code: UNTGD

Resource Type

  • Article

Format

  • Text

Identifier

  • Other: DE98003473
  • Report No.: LA-UR--98-397
  • Report No.: CONF-980217--
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 663206
  • Archival Resource Key: ark:/67531/metadc708478

Note

  • Display Note: INIS; OSTI as DE98003473
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