Experimental investigations on the role of e x B flow shear in improved confinement

S. Jachmich; G. Van Oost; R. R. Weynants; J. A. Boedo

doi:10.1088/0741-3335/40/6/016

Experimental investigations on the role of e x B flow shear in improved confinement

S. Jachmich, G. Van Oost, R. R. Weynants, J. A. Boedo

Laboratory for Plasma Physics

Publikation: Beitrag in Fachzeitschrift › Artikel › Begutachtung

Abstract

Edge transport and confinement changes induced by radial electric fields, externally imposed in TEXTOR-94 by means of electrode biasing, were investigated. The edge profiles of the electric field E_r were measured continuously by a specially developed nine-tip Langmuir probe, thus allowing the study of the relative spatial and temporal dynamics of E_r and its radial gradient and possible ensuing transport changes. A particle transport barrier is found to be built up as the electric field gradient increases, thus strengthening the conjecture that E x B stabilization is a viable mechanism for improved confinement in tokamaks.

Originalsprache	Englisch
Seiten (von - bis)	1105-1113
Seitenumfang	9
Fachzeitschrift	Plasma Physics and Controlled Fusion
Jahrgang	40
Ausgabenummer	6
DOIs	https://doi.org/10.1088/0741-3335/40/6/016
Publikationsstatus	Veröffentlicht - 1998

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10.1088/0741-3335/40/6/016

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abstract = "Edge transport and confinement changes induced by radial electric fields, externally imposed in TEXTOR-94 by means of electrode biasing, were investigated. The edge profiles of the electric field Er were measured continuously by a specially developed nine-tip Langmuir probe, thus allowing the study of the relative spatial and temporal dynamics of Er and its radial gradient and possible ensuing transport changes. A particle transport barrier is found to be built up as the electric field gradient increases, thus strengthening the conjecture that E x B stabilization is a viable mechanism for improved confinement in tokamaks.",

author = "S. Jachmich and {Van Oost}, G. and Weynants, {R. R.} and Boedo, {J. A.}",

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Experimental investigations on the role of e x B flow shear in improved confinement

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