Gyrokinetic study of the electron temperature gradient instability in plasmas with slightly hollow density profiles

The electron temperature gradient driven instabilities in plasmas with slightly hollow density profiles are studied. The gyrokinetic integral eigenvalue equation valid for a sheared slab configuration is employed. The Debye shielding effect on the modes is investigated. The effects of a sheared E×B...

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Bibliographic Details
Published in:Physics of plasmas 2001-08, Vol.8 (8), p.3635-3644
Main Authors: Dong, J. Q., Sanuki, H., Itoh, K.
Format: Article
Language:English
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Summary:The electron temperature gradient driven instabilities in plasmas with slightly hollow density profiles are studied. The gyrokinetic integral eigenvalue equation valid for a sheared slab configuration is employed. The Debye shielding effect on the modes is investigated. The effects of a sheared E×B flow on the modes are considered. Six modes with even or odd parities are found to be simultaneously unstable. The mixing length estimate for the transport is calculated. The flow shear suppression on the modes, as well as on the transport, is demonstrated. The correlations of the results with helical system Heliotron/Torsotron and tokamak experiments are discussed.
ISSN:1070-664X
1089-7674
DOI:10.1063/1.1381564