Lower-hybrid poloidal current drive for fluctuation reduction in a reversed field pinch

Journal Article · Tue Nov 01 00:00:00 EST 1994 · Physics of Plasmas; (United States)

DOI:https://doi.org/10.1063/1.870886· OSTI ID:6958989

Uchimoto, E; Cekic, M; Harvey, R W; Litwin, C; Prager, S C; Sarff, J S; Sovinec, C R ^[1]

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1. Department of Physics, University of Wisconsin, Madison, Wisconsin 53706 (United States)

Current drive using the lower-hybrid slow wave is shown to be a promising candidate for improving confinement properties of a reversed field pinch. Ray-tracing calculations indicate that the wave will make a few poloidal turns while spiraling radially into a target zone inside the reversal layer. The poloidal antenna wavelength of the lower hybrid wave can be chosen so that efficient parallel current drive will occur mostly in the poloidal direction in this outer region. Three-dimensional resistive magnetohydrodynamic computation demonstrates that an additive poloidal current in this region will reduce the magnetic fluctuations and magnetic stochasticity.

• DOE Contract Number: FG02-85ER53212; AC03-89ER51114
• OSTI ID: 6958989
• Journal Information: Physics of Plasmas; (United States), Vol. 1:11; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
REVERSE-FIELD PINCH
LOWER HYBRID CURRENT DRIVE
FLUCTUATIONS
PLASMA CONFINEMENT
PLASMA MACROINSTABILITIES
PLASMA SIMULATION
CONFINEMENT
INSTABILITY
NON-INDUCTIVE CURRENT DRIVE
PINCH EFFECT
PLASMA INSTABILITY
SIMULATION
VARIATIONS
700340* - Plasma Waves
Oscillations
& Instabilities- (1992-)
700310 - Plasma Confinement- (1992-)
700330 - Plasma Kinetics
Transport
& Impurities- (1992-)