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DOI http://dx.doi.org/10.1063/1.873325
Title Fluctuation level bursts in a model of internal transport barrier formation
Creator/Author Lopez-Bruna, D. ; Newman, D.E. ; Carreras, B.A. [Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-8071 (United States)] ; Diamond, P.H. [University of California at San Diego, La Jolla, California 92093-0319 (United States)]
Publication Date1999 Mar 01
OSTI IdentifierOSTI ID: 321495
Other Number(s)Journal ID: PHPAEN; ISSN 1070-664X; TRN: TRN: 9905M0102
Resource TypeJournal Article
Resource RelationJournal Name: Physics of Plasmas; Journal Volume: 6; Journal Issue: 3; Other Information: PBD: Mar 1999
Subject70 PLASMA PHYSICS AND FUSION; PLASMA WAVES; FLUCTUATIONS; PLASMA CONFINEMENT; TURBULENCE; CHARGED-PARTICLE TRANSPORT; OSCILLATIONS
Description/AbstractA model of internal transport barriers (ITB) is developed that, in addition to the typical features of ITB models (the phase transition character with a power threshold, barrier front propagation, etc.), exhibits an oscillatory/bursty behavior close to the transition. This behavior comes from the competition between the driving and suppression mechanisms for the turbulence. The onset of the oscillations has a power threshold, P{sub osc}, below the power threshold for the transition to the enhanced confinement regime, P{sub th}. In the calculations, P{sub osc}{approximately}0.5P{sub th}. This suggests that the oscillations avoid an early transition at P{sub th}=P{sub osc}, so any mechanism that eliminates the oscillations may lower the transition power. {copyright} {ital 1999 American Institute of Physics.}
Country of PublicationUnited States
LanguageEnglish
FormatMedium: X; Size: pp. 854-862
System Entry Date2008 Feb 04

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