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Formation of a velocity shear layer in confined plasmas

It is shown, by allowing for finite momentum loss, that an E×B velocity shear layer forms naturally from the radial potential profile created at the boundary or scrape‐off region of a confined plasma where magnetic field lines come into contact with material surfaces. The loss of perpendicular momen...

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Published in:	Physics of fluids. B, Plasma physics Plasma physics, 1992-12, Vol.4 (12), p.4057-4061
Main Author:	Tsui, H. Y. W.
Format:	Article
Language:	English
Subjects:	70 PLASMA PHYSICS AND FUSION TECHNOLOGY 700310 - Plasma Confinement- (1992-) 700350 - Plasma Production, Heating, Current Drive, & Interactions- (1992-) CLOSED PLASMA DEVICES CONFINEMENT Exact sciences and technology LAYERS LINEAR MOMENTUM Magnetic confinement and equilibrium MECHANICAL PROPERTIES Physics Physics of gases, plasmas and electric discharges Physics of plasmas and electric discharges PLASMA CONFINEMENT SHEAR PROPERTIES THERMONUCLEAR DEVICES TOKAMAK DEVICES VELOCITY WALL EFFECTS
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description	It is shown, by allowing for finite momentum loss, that an E×B velocity shear layer forms naturally from the radial potential profile created at the boundary or scrape‐off region of a confined plasma where magnetic field lines come into contact with material surfaces. The loss of perpendicular momentum governs the structure of the velocity shear in the scrape‐off layer via the generation of a radial current that modifies the potential profile. Increase in velocity shear is coupled to improvement in momentum confinement.
doi_str_mv	10.1063/1.860312
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subjects	70 PLASMA PHYSICS AND FUSION TECHNOLOGY 700310 - Plasma Confinement- (1992-) 700350 - Plasma Production, Heating, Current Drive, & Interactions- (1992-) CLOSED PLASMA DEVICES CONFINEMENT Exact sciences and technology LAYERS LINEAR MOMENTUM Magnetic confinement and equilibrium MECHANICAL PROPERTIES Physics Physics of gases, plasmas and electric discharges Physics of plasmas and electric discharges PLASMA CONFINEMENT SHEAR PROPERTIES THERMONUCLEAR DEVICES TOKAMAK DEVICES VELOCITY WALL EFFECTS
title	Formation of a velocity shear layer in confined plasmas
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