Model of L- to H-mode transition in tokamak

A new model of L- to H-mode transition in tokamak plasmas is presented. Nonambipolar particle losses determine the consistent radial electric field near plasma periphery. ''Cusp-type catastrophe'' among the radial electric field, particle flux, and edge gradients is found. At the...

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Veröffentlicht in:	Phys. Rev. Lett.; (United States) 1988-05, Vol.60 (22), p.2276-2279
Hauptverfasser:	ITOH, S.-I, ITOH, K
Format:	Artikel
Sprache:	eng
Schlagworte:	70 PLASMA PHYSICS AND FUSION TECHNOLOGY 700101 > Fusion Energy-- Plasma Research-- Confinement, Heating, & Production CLOSED PLASMA DEVICES CONFINEMENT ELECTRIC FIELDS END EFFECTS Exact sciences and technology Magnetic confinement and equilibrium OSCILLATION MODES PARTICLE LOSSES Physics Physics of gases, plasmas and electric discharges Physics of plasmas and electric discharges PLASMA PLASMA CONFINEMENT THERMONUCLEAR DEVICES 700107 > Fusion Energy-- Plasma Research-- Instabilities TOKAMAK DEVICES
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Beschreibung
Zusammenfassung:	A new model of L- to H-mode transition in tokamak plasmas is presented. Nonambipolar particle losses determine the consistent radial electric field near plasma periphery. ''Cusp-type catastrophe'' among the radial electric field, particle flux, and edge gradients is found. At the transition, plasma loss can take multiple values for one profile of density and temperature near the edge. A critical edge condition for the transition is obtained.
ISSN:	0031-9007 1079-7114
DOI:	10.1103/PhysRevLett.60.2276