Open AccessSTABILIZING EFFECTS OF HOT ELECTRONS ON LOW FREQUENCY PLASMA DRIFT WAVES
Author(s) -
Huang Chao-Song,
Linjing Qiu,
Zhoupeng Ren
Publication year - 1988
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.37.1284
Subject(s) - plasma , electron , dispersion relation , physics , electromagnetic electron wave , instability , atomic physics , waves in plasmas , drift velocity , two stream instability , plasma oscillation , dispersion (optics) , low frequency , lower hybrid oscillation , condensed matter physics , mechanics , optics , nuclear physics , astronomy
The MHD equation is used to study the stabilization of low frequency drift waves driven by density gradient of plasma in a hot electron plasma. The dispersion relation is derived, and the stabilizing effects of hot electrons are discussed. The physical mechanism for hot electron stabilization of the low frequency plasma perturbations is charge uncovering due to the hot electron component, which depends only on a, the ratio of Nb/Nt, but not on the value of βh. The hot electrons can reduce the growth rate of the interchange mode and drift wave driven by the plasma, and suppress the anomalous plasma transport caused by the drift wave. Without including the effect of βh, the stabilization of the interchange mode requires α≈2%, and the stabilization of the drift wave requires α≈40%. The theoretical analyses predict that the drift wave is the most dangerois low frequency instability in the hot electron plasma.