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Semiempirical models of H-mode discharges [electronic resource].

Published
Princeton, N.J. : Princeton University, 1985.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description
Pages: 57 : digital, PDF file
Additional Creators
Princeton University and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
The H-mode transition can lead to a rapid increase in tokamak plasma confinement. A semiempirical transport model was derived from global OH and L-mode confinement scalings and then applied to simulation of H-mode discharges. The radial diffusivities in the model also depend on local density and pressure gradients and satisfy an appropriate dimensional constraint. Examples are shown of the application of this and similar models to the detailed simulation of two discharges which exhibit an H-mode transition. The models reproduce essential features of plasma confinement in the ohmic heating, low and high confinement phases of these discharges. In particular, the evolution of plasma energy content through the H-mode transition can be reproduced without any sudden or ad hoc modification of the plasma transport formulation.
Report Numbers
E 1.99:pppl-2103
pppl-2103
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Note
Published through SciTech Connect.
05/01/1985.
"pppl-2103"
"DE85011581"
Johnson, D.; LeBlanc, B.; Boyd, D.; Hulse, R.; Singer, C.E.; Heifetz, D.; Grek, B.; Cavallo, A.; Redi, M.; Langer, W.
Funding Information
AC02-76CH03073
View MARC record | catkey: 14748009