Journal Article

PreJuSER-38507

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Profile Stiffness and Global Confinement

Garbet, X. ; Mantica, P. ; Ryter, F. ; Imbeaux, F. ; Sozzi, C. ; Parail, V. ; Wolf, R. C.FZJ*

2004
IOP Publ. Bristol

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Please use a persistent id in citations: http://hdl.handle.net/2128/1837  doi:10.1088/0741-3335/46/9/002

Abstract: This paper analyses the properties of a critical gradient transport model based on a few assumptions: electrostatic gyroBohm scaling law, existence of an instability threshold and finite background transport below the threshold. A quantitative criterion of stiffness is proposed, which provides the means for a quantitative assessment and inter-machine comparison. It is also shown that this transport model is compatible with a two-term scaling law of global confinement, as proposed recently by the International Tokamak Physics Activity-Confinement Data Base and Modelling Topical Group. This model has also been applied to analyse a variety of experiments mostly using electron heat modulation on JET, ASDEX-Upgrade, TORE SUPRA and FTU. The thresholds are found to be in the expected domain for micro-instabilities in tokamaks. However, the stiffness factor is found to cover a broad range of variation.

Keyword(s): J

Note: Record converted from VDB: 12.11.2012

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Contributing Institute(s):

1. Institut für Plasmaphysik (IPP)

Research Program(s):

1. Kernfusion und Plasmaforschung (E05)

Appears in the scientific report 2004
Notes: This version is available at the following Publisher URL: http://stacks.iop.org/0741-3335/46/1351

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