
Accession Number : ADA114814
Title : Influence of Magnetic Shear on the LowerHybridDrift 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 selfconsistent theory of the lowerhybriddrift 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 driftwave 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 driftwave 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