Fluctuation and transport reduction in a reversed field pinch by inductive poloidal current drive

An auxiliary poloidal inductive electric field applied to a reserved field pinch plasma reduces the current density gradient, slows the growth of [ital m]=1 tearing fluctuations, suppresses their associated sawteeth, and doubles the energy confinement time. Small sawteeth occur in the improved state...

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Veröffentlicht in:	Physical review letters 1994-06, Vol.72 (23), p.3670-3673
Hauptverfasser:	Sarff, JS, Hokin, SA, Ji, H, Prager, SC, Sovinec, CR
Format:	Artikel
Sprache:	eng
Schlagworte:	70 PLASMA PHYSICS AND FUSION TECHNOLOGY 700330 > Plasma Kinetics, Transport, & Impurities-- (1992-) 700340 > Plasma Waves, Oscillations, & Instabilities-- (1992-) CHARGE TRANSPORT CONFINEMENT DATA ENERGY LOSSES EXPERIMENTAL DATA FLUCTUATIONS INDUCTION INFORMATION INHIBITION INSTABILITY LOSSES MAGNETIC CONFINEMENT NON-INDUCTIVE CURRENT DRIVE NUMERICAL DATA OSCILLATIONS PINCH EFFECT PLASMA PLASMA CONFINEMENT PLASMA INSTABILITY PLASMA MACROINSTABILITIES REVERSE-FIELD PINCH SAWTOOTH OSCILLATIONS TEARING INSTABILITY VARIATIONS 700310 > Plasma Confinement-- (1992-) WAVE FORMS
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Beschreibung
Zusammenfassung:	An auxiliary poloidal inductive electric field applied to a reserved field pinch plasma reduces the current density gradient, slows the growth of [ital m]=1 tearing fluctuations, suppresses their associated sawteeth, and doubles the energy confinement time. Small sawteeth occur in the improved state but with [ital m]=0 precursors. By requiring a change of toroidal flux embedding the plasma, inductive poloidal current profile drive is transient, but the improvement encourges the program of reversed field pinch transport suppression using current profile control.
ISSN:	0031-9007 1079-7114
DOI:	10.1103/physrevlett.72.3670