Stabilization of lower hybrid drift modes by finite parallel wavenumber and electron temperature gradients in field-reversed configurations

Journal Article · Tue Aug 01 04:00:00 EDT 1989 · Phys Fluids B; (United States)

DOI:https://doi.org/10.1063/1.858943· OSTI ID:5935819

Farengo, R; Guzdar, P N; Lee, Y C

The effect of finite parallel wavenumber and electron temperature gradients on the lower hybrid drift instability is studied in the parameter regime corresponding to the TRX-2 device (Fusion Technol. /bold 9/, 48 (1986)). Perturbations in the electrostatic potential and all three components of the vector potential are considered and finite beta electron orbit modifications are included. The electron temperature gradient decreases the growth rate of the instability but, for /ital k//sub /ital z//=0, unstable modes exist for /eta//sub /ital e//(=/ital T//sup /prime///sub /ital e/n//sub 0///ital T//sub /ital e/n//sup //sub 0/)/gt/6. Since finite /ital k//sub /ital z// effects completely stabilize the mode at small values of /ital k//sub /ital z////ital k//sub /ital y//(/congruent/5/times/10/sup /minus/3/), magnetic shear could be responsible for stabilizing the lower hybrid drift instability in field-reversed configurations.

• Research Organization: Division Fusion Nuclear, Comision Nacional de Energia Atomica, 1429-Buenos Aires, Argentina(AR); Laboratory for Plasma Research, University of Maryland, College Park, Maryland 20742
• OSTI ID: 5935819
• Journal Information: Phys Fluids B; (United States), Journal Name: Phys Fluids B; (United States) Vol. 1:8; ISSN PFBPE
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700107* -- Fusion Energy-- Plasma Research-- Instabilities
DRIFT INSTABILITY
ELECTROMAGNETIC RADIATION
ELECTRON TEMPERATURE
ELECTRONS
ELEMENTARY PARTICLES
FERMIONS
INSTABILITY
INSTABILITY GROWTH RATES
LEPTONS
LOW-BETA PLASMA
MAGNETIC FIELD CONFIGURATIONS
MAGNETIC FIELD REVERSAL
PLASMA
PLASMA INSTABILITY
PLASMA MICROINSTABILITIES
RADIATIONS
SHEAR
STABILIZATION
TEMPERATURE GRADIENTS
TRAJECTORIES