Critical threshold behavior for steady-state internal transport barriers in burning plasmas

Critical threshold behavior for steady-state internal transport barriers in burning plasmas

Burning tokamak plasmas with internal transport barriers are investigated by means of integrated modeling simulations. The barrier sustainment in steady state, differently from the barrier formation process, is found to be characterized by a critical behavior, and the critical number of the phase tr...

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Bibliographic Details
Published in:Physical review letters Vol. 100; no. 25; p. 255004
Main Authors: García, J, Giruzzi, G, Artaud, J F, Basiuk, V, Decker, J, Imbeaux, F, Peysson, Y, Schneider, M
Format: Journal Article
Language:English
Published: United States 27-06-2008
Subjects:
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
PHASE TRANSFORMATIONS
PLASMA
PLASMA SIMULATION
STEADY-STATE CONDITIONS
TOKAMAK DEVICES
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Summary:Burning tokamak plasmas with internal transport barriers are investigated by means of integrated modeling simulations. The barrier sustainment in steady state, differently from the barrier formation process, is found to be characterized by a critical behavior, and the critical number of the phase transition is determined. Beyond a power threshold, alignment of self-generated and noninductively driven currents occurs and steady state becomes possible. This concept is applied to simulate a steady-state scenario within the specifications of the International Thermonuclear Experimental Reactor.
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ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.100.255004