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Theory of the L-H transition [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy, 1994.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description
11 pages : digital, PDF file
Additional Creators
General Atomic Company, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
The theory of the L-H transition in tokamaks is discussed. A transport bifurcation model is presented, which predicts reasonably well several properties of the L-H transition in the DIII-D tokamak, including the evolution in time of the density and temperature profiles. A bifurcation in the radial transport occurs because of a nonlinear feedback mechanism involving the radial electric field. A spontaneous transition is predicted when certain conditions are met; no trigger mechanism is necessary. The predicted profile evolution in H-mode can include a transition to VH-mode, with its characteristically wider transport barrier at the plasma edge. Trigger mechanisms are discussed, as well as the idea of considering the L-H transition as a phase transition.
Report Numbers
E 1.99:ga-a--21778
E 1.99: conf-9408176--1
conf-9408176--1
ga-a--21778
Subject(s)
Other Subject(s)
Note
Published through SciTech Connect.
09/01/1994.
"ga-a--21778"
" conf-9408176--1"
"DE95001389"
"35AT10020/35KC07000"
ISPP workshop on the theory of fusion plasmas,Varenna (Italy),22-26 Aug 1994.
Hinton, F.L.
Funding Information
AC03-89ER51114
View MARC record | catkey: 14744354