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Author Batishchev, O. V. ♦ Xu, X. Q. ♦ Byers, J. A. ♦ Cohen, R. H. ♦ Krasheninnikov, S. I. ♦ Rognlien, T. D. ♦ Sigmar, D. J.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword PLASMA PHYSICS AND FUSION ♦ PLASMA SCRAPE-OFF LAYER ♦ PLASMA SIMULATION ♦ TOKAMAK DEVICES ♦ KINETIC EQUATIONS ♦ PLASMA SHEATH ♦ DIVERTORS ♦ MONTE CARLO METHOD ♦ TRANSPORT THEORY
Abstract A model of high recycling scrape-off layer plasmas in tokamaks is presented where both ion and electron species are described by nonlinear kinetic equations. Coulomb and charged-neutral particle collisions are included. The ambipolar electric field and electrostatic sheath potential are evaluated self-consistently. Two models of fluid neutral transport are used to distinguish the neutral density variation for different tokamak divertor geometries. These models are incorporated into a comprehensive three-dimensional (1-D, 2 V) hybrid collisional particle-in-cell{endash}Monte Carlo code W1 [Contrib. Plasma Phys. {bold 34}, 436 (1994)]. This code is used to investigate the effects of neutrals on divertor plasma detachment phenomena and on parallel heat and particle fluxes in the presence of strong gradients where fluid descriptions break down. Results are given for simulations of detached and attached divertor plasmas, and comparisons are made with solutions from a one-dimensional fluid model and with experimental observations. {copyright} {ital 1996 American Institute of Physics.}
ISSN 1070664X
Educational Use Research
Learning Resource Type Article
Publisher Date 1996-09-01
Publisher Place United States
Journal Physics of Plasmas
Volume Number 3
Issue Number 9


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