Temporal behavior of the plasma current distribution in the ASDEX tokamak during lower-hybrid current drive

Measurements of the time evolution of the current-density distribution in ASDEX show that lower-hybrid current drive leads to broader profiles, whereby q increases from qapprox. 1 in the plasma central region. Simultaneously, the electron temperature is observed to peak, thus demonstrating that the...

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Veröffentlicht in:	Phys. Rev. Lett.; (United States) 1987-02, Vol.58 (5), p.491-494
Hauptverfasser:	MCCORMICK, K, SÖLDNER, F. X, GRUBER, O, KEILHACKER, M, KLÜBER, O, LACKNER, K, MEISEL, D, MERTENS, V, RÖHR, H, SCHMITTER, K.-H, STEUER, K.-H, WAGNER, F, ECKHARTT, D, LEUTERER, F, MURMANN, H, DERFLER, H, EBERHAGEN, A, GEHRE, O, GERNHARDT, J, GIERKE, G. V
Format:	Artikel
Sprache:	eng
Schlagworte:	70 PLASMA PHYSICS AND FUSION TECHNOLOGY 700101 > Fusion Energy-- Plasma Research-- Confinement, Heating, & Production ASDEX TOKAMAK CLOSED PLASMA DEVICES CURRENT DENSITY CURRENT-DRIVE HEATING DATA DISTRIBUTION ELECTRIC HEATING ELECTRON TEMPERATURE Exact sciences and technology EXPERIMENTAL DATA HEATING INFORMATION JOULE HEATING Magnetic confinement and equilibrium NUMERICAL DATA Physics Physics of gases, plasmas and electric discharges Physics of plasmas and electric discharges PLASMA PLASMA DIAGNOSTICS PLASMA HEATING RESISTANCE HEATING THERMONUCLEAR DEVICES TIME DEPENDENCE TOKAMAK DEVICES 700102 > Fusion Energy-- Plasma Research-- Diagnostics
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Zusammenfassung:	Measurements of the time evolution of the current-density distribution in ASDEX show that lower-hybrid current drive leads to broader profiles, whereby q increases from qapprox. 1 in the plasma central region. Simultaneously, the electron temperature is observed to peak, thus demonstrating that the lower-hybrid--driven current distribution is decoupled from the classical conductivity profile.
ISSN:	0031-9007 1079-7114
DOI:	10.1103/physrevlett.58.491