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Author Seol, J. ♦ Aydemir, A. Y. ♦ Shaing, K. C.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword PLASMA PHYSICS AND FUSION TECHNOLOGY ♦ CONFINEMENT ♦ DENSITY ♦ DISTURBANCES ♦ EDGE LOCALIZED MODES ♦ ELECTRIC FIELDS ♦ ENTROPY ♦ MACH NUMBER ♦ PERTURBATION THEORY ♦ PLASMA ♦ PRESSURE GRADIENTS ♦ STABILITY ♦ TOKAMAK DEVICES ♦ TRANSPORT THEORY
Abstract In the high confinement mode of tokamaks, magnitude of the radial electric field increases at the edge. Thus, the poloidal flow inside the transport barrier can be sonic when the edge pressure gradient is not steep enough to make the poloidal flow subsonic. When the poloidal Mach number is close to unity, a shock appears in the low field side and causes a large density perturbation. In this study, we describe a shock induced by the sonic poloidal plasma flow. Then, an entropy production across the shock is calculated. Finally, we introduce a simple model for Type III edge localized modes using the poloidal density variation driven by the sonic poloidal flow.
ISSN 1070664X
Educational Use Research
Learning Resource Type Article
Publisher Date 2016-04-15
Publisher Place United States
Journal Physics of Plasmas
Volume Number 23
Issue Number 4


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