Influence of magnetic shear on the lower-hybrid drift instability in finite. beta. plasmas

Journal Article · Sat Jan 01 00:00:00 EST 1983 · Phys. Fluids; (United States)

OSTI ID:6614674

Huba, J D; Ganguli, G

A self-consistent theory of the lower-hybrid-drift instability in finite ..beta.. plasmas containing magnetic shear is presented. The important finite ..beta.. effects included are (1) the coupling of electrostatic and electromagnetic oscillations and (2) the orbit modification of the electrons due to delB. It is found that the effect of electromagnetic coupling is a destabilizing influence on the instability in a sheared field. On the other hand, the effect of electron orbit modification (i.e., electron delB drift-wave resonances) is a stabilizing influence. The key parameter which dictates which effect is more important is T/sub e/ /T/sub i/. In the limit T/sub e/ < or =T/sub i/, the delB electron drift-wave resonance is more important. The relevance of these results to reversed field plasmas is discussed.

• Research Organization: Geophysical and Plasma Dynamics Branch, Plasma Physics Division, Naval Research Laboratory, Washington, DC 20375
• OSTI ID: 6614674
• Journal Information: Phys. Fluids; (United States), Vol. 26:1
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
DRIFT INSTABILITY
PLASMA WAVES
ELECTROMAGNETIC RADIATION
COUPLING
PLASMA
BETA RATIO
ELECTRON TEMPERATURE
HYBRID RESONANCE
ION TEMPERATURE
MAGNETIC FIELD REVERSAL
MAGNETIC FIELDS
MODIFICATIONS
OSCILLATION MODES
SHEAR
TRAJECTORIES
USES
INSTABILITY
MAGNETIC FIELD CONFIGURATIONS
PLASMA INSTABILITY
PLASMA MICROINSTABILITIES
RADIATIONS
RESONANCE
700107* - Fusion Energy- Plasma Research- Instabilities
700108 - Fusion Energy- Plasma Research- Wave Phenomena