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Simulation of edge-plasma profiles and turbulence related to L-H transitions in tokamaks [electronic resource].

Published
Washington, D.C : United States. Dept. of Energy. Office of the Assistant Secretary for Defense Programs, 1999.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description
936 Kilobytes pages : digital, PDF file
Additional Creators
Lawrence Livermore National Laboratory, United States. Department of Energy. Office of the Assistant Secretary for Defense Programs, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
Understanding plasma profile evolution and plasma turbulence are two important aspects of developing a predictive model for edge-plasma in tokamaks and other fusion-related devices. Here they describe results relevant to the L-H transition phenomena observed in tokamaks obtained from two simulations codes which emphasize the two aspects of the problem. UEDGE solves for the two-dimensional (2-D) profiles of a multi-species plasma and neutrals given some anomalous cross-field diffusion coefficients, and BOUT solves for the three-dimensional (3-D) turbulence that gives rise to the anomalous diffusion. These two codes are thus complementary in solving different aspects of the edge-plasma transport problem; ultimately, they want to couple the codes so that UEDGE uses BOUT's turbulence transport results, and BOUT uses UEDGE's plasma profiles with a fully automated iteration procedure. This goal is beyond the present paper; here they show how each aspect of the problem, i.e., profiles and turbulent transport, can contribute to L-H type transitions.
Report Numbers
E 1.99:ucrl-jc-135746
E 1.99: at5020100
at5020100
ucrl-jc-135746
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Other Subject(s)
Note
Published through SciTech Connect.
09/21/1999.
"ucrl-jc-135746"
" at5020100"
"AT5020100"
IAEA Technical Committee Meeting/H-Mode Physics, Oxford (GB), 09/27/1999--09/29/1999.
Cohen, R H; Xu, X Q; Rognlien, T D.
Funding Information
W-7405-ENG-48
View MARC record | catkey: 14742359