Kinetic effects on particle and heat fluxes in detached plasmas

Journal Article · Sun Sep 01 04:00:00 EDT 1996 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.871615· OSTI ID:286958

Batishchev, O V ^[1]; Xu, X Q; Byers, J A; Cohen, R H ^[2]; Krasheninnikov, S I ^[1]; Rognlien, T D ^[2]; Sigmar, D J ^[1]

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1. Massachusetts Institute of Technology, Plasma Fusion Center, Cambridge, Massachusetts 02139 (United States)
2. Lawrence Livermore National Laboratory, University of California, Livermore, California 94550 (United States)

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.}

• DOE Contract Number: FG02-88ER53263; FG02-91ER54109; W-7405-ENG-48
• OSTI ID: 286958
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 9 Vol. 3; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
DIVERTORS
KINETIC EQUATIONS
MONTE CARLO METHOD
PLASMA SCRAPE-OFF LAYER
PLASMA SHEATH
PLASMA SIMULATION
TOKAMAK DEVICES
TRANSPORT THEORY