Accession Number : ADA114814

Title :   Influence of Magnetic Shear on the Lower-Hybrid-Drift Instability in Finite beta Plasmas.

Descriptive Note : Memorandum rept.,

Corporate Author : NAVAL RESEARCH LAB WASHINGTON DC

Personal Author(s) : Huba,J D ; Ganguli,G

PDF Url : ADA114814

Report Date : 18 May 1982

Pagination or Media Count : 40

Abstract : 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 delta B. 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 delta B drift-wave resonance) is a stabilizing influence. The key parameter which dictates which effect is more important is Te/Ti. In the limit Te Ti, the electromagnetic effect dominates, while for Te greater than or equal Ti, the delta B electron drift-wave resonance is more important. The relevance of these results to reversed field is discussed. (Author)

Descriptors :   *Electromagnetism, *Plasmas(Physics), *Shear properties, *Oscillation, Hybrid systems, Electrostatics, Electromagnetic radiation, Stability, Molecular orbitals, Electrons, Magnetic fields, Consistency, Theory

Subject Categories : Electricity and Magnetism
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE