SELFCONSISTENT LANGEVIN SIMULATION OF COULOMB COLLISIONS IN CHARGEDPARTICLE BEAMS
Abstract
In many plasma physics and chargedparticle beam dynamics problems, Coulomb collisions are modeled by a FokkerPlanck equation. In order to incorporate these collisions, we present a threedimensional parallel Langevin simulation method using a ParticleInCell (PIC) approach implemented on highperformance parallel computers. We perform, for the first time, a fully selfconsistent simulation, in which the friction and diffusion coefficients are computed from first principles. We employ a twodimensional domain decomposition approach within a message passing programming paradigm along with dynamic load balancing. Object oriented programming is used to encapsulate details of the communication syntax as well as to enhance reusability and extensibility. Performance tests on the SGI Origin 2000 and the Cray T3E900 have demonstrated good scalability. Work is in progress to apply our technique to intrabeam scattering in accelerators.
 Authors:
 Publication Date:
 Research Org.:
 Los Alamos National Lab., NM (US)
 Sponsoring Org.:
 US Department of Energy (US)
 OSTI Identifier:
 768985
 Report Number(s):
 LAUR002354
TRN: US0303005
 DOE Contract Number:
 W7405ENG36
 Resource Type:
 Conference
 Resource Relation:
 Conference: Conference title not supplied, Conference location not supplied, Conference dates not supplied; Other Information: PBD: 1 May 2000
 Country of Publication:
 United States
 Language:
 English
 Subject:
 43 PARTICLE ACCELERATORS; ACCELERATORS; BEAM DYNAMICS; COMMUNICATIONS; COMPUTERS; DIFFUSION; DYNAMIC LOADS; FOKKERPLANCK EQUATION; FRICTION; PHYSICS; PLASMA; PROGRAMMING; SCATTERING; SIMULATION; PARALLEL PROCESSING
Citation Formats
J. QIANG, R. RYNE, and S. HABIB. SELFCONSISTENT LANGEVIN SIMULATION OF COULOMB COLLISIONS IN CHARGEDPARTICLE BEAMS. United States: N. p., 2000.
Web.
J. QIANG, R. RYNE, & S. HABIB. SELFCONSISTENT LANGEVIN SIMULATION OF COULOMB COLLISIONS IN CHARGEDPARTICLE BEAMS. United States.
J. QIANG, R. RYNE, and S. HABIB. 2000.
"SELFCONSISTENT LANGEVIN SIMULATION OF COULOMB COLLISIONS IN CHARGEDPARTICLE BEAMS". United States.
doi:. https://www.osti.gov/servlets/purl/768985.
@article{osti_768985,
title = {SELFCONSISTENT LANGEVIN SIMULATION OF COULOMB COLLISIONS IN CHARGEDPARTICLE BEAMS},
author = {J. QIANG and R. RYNE and S. HABIB},
abstractNote = {In many plasma physics and chargedparticle beam dynamics problems, Coulomb collisions are modeled by a FokkerPlanck equation. In order to incorporate these collisions, we present a threedimensional parallel Langevin simulation method using a ParticleInCell (PIC) approach implemented on highperformance parallel computers. We perform, for the first time, a fully selfconsistent simulation, in which the friction and diffusion coefficients are computed from first principles. We employ a twodimensional domain decomposition approach within a message passing programming paradigm along with dynamic load balancing. Object oriented programming is used to encapsulate details of the communication syntax as well as to enhance reusability and extensibility. Performance tests on the SGI Origin 2000 and the Cray T3E900 have demonstrated good scalability. Work is in progress to apply our technique to intrabeam scattering in accelerators.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 2000,
month = 5
}

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