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Edge and coupled core/edge transport modeling in tokamak [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy. Office of Energy Research, 1998.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description
1.4 Mbytes : digital, PDF file
Additional Creators
Lawrence Berkeley National Laboratory, United States. Department of Energy. Office of Energy Research, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
Recent advances in the theory and modelling of tokamak edge, scrape-off-layer and divertor plasmas are described. The effects of the poloidal ExB drift on inner/outer divertor-plate asymmetries within a 1D analysis are shown to be in good agreement with experimental observations; above a critical v ExB, the model predicts transitions to supersonic SOL flow at the inboard midplane. Two-dimensional simulations show the importance of ExB flow in the private-flux region and B-drift effects. A theory of rough plasma-facing surfaces is given, and interesting effects, some traveling back up the magnetic field-lines to the SOL plasma, are predicted. The parametric dependence of detached-plasma states in slab geometry has been explored; with sufficient pumping, the location of the ionization front can be controlled; otherwise only fronts at the plate or the X-point are stable. Studies with a more accurate Monte-Carlo neutrals model and a detailed non-LTE radiation-transport code indicate various effects are important for quantitative rnodelling. Long-lived oscillatory UEDGE solutions in both ITER and DIII-D are reported. Detailed simulations of the DIII-D core and edge are presented; impurity and plasma flow are shown to be well modelled with UEDGE, and the roles of impurity and neutral transport in the edge and SOL are discussed.
Report Numbers
E 1.99:ucrl-jc-130155
ucrl-jc-130155
Subject(s)
Other Subject(s)
Note
Published through SciTech Connect.
10/14/1998.
"ucrl-jc-130155"
"AT5020100"
"DE00002530"
17th International Atomic Energy Agency Fusion Energy Conference, Yokohama, Japan, October 19-24, 1998.
Scott, H A; Cohen, R H; Pearlstein, L D; Porter, G D; LoDestro, L L; Ryutov, D D; Rensink, M E; Casper, T A; Mattor, N; Rognlien, T D; Wan, A.
Funding Information
W-7405-Eng-48
View MARC record | catkey: 14742771