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

Forschungszentrum Jülich GmbH
University of California, San Diego

Research output: Contribution to journal › Article › peer-review

66 Citations (Scopus)

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.

Original language	English
Pages (from-to)	1105-1113
Number of pages	9
Journal	Plasma Physics and Controlled Fusion
Volume	40
Issue number	6
DOIs	https://doi.org/10.1088/0741-3335/40/6/016
Publication status	Published - 1998

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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.",

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AU - Weynants, R. R.

AU - Boedo, J. A.

PY - 1998

Y1 - 1998

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AB - 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.

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JF - Plasma Physics and Controlled Fusion

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ER -

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

Abstract

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