Accession Number:

ADA089180

Title:

Effect of Finite Electron Drift Velocity on the Resonant Excitation of a Nonuniform Plasma,

Descriptive Note:

Corporate Author:

CALIFORNIA UNIV LOS ANGELES PLASMA PHYSICS GROUP

Personal Author(s):

Report Date:

1980-07-01

Pagination or Media Count:

32.0

Abstract:

An exact analytic solution of the external resonant excitation of a nonuniform plasma in the presence of a zero order finite electron drift is presented. The process of linear mode conversion of the long wavelength external radiation, of frequency omega, into a Langmuir wave limits the peak amplitude of the cold plasma resonance at omega omega sub p, where omega sub p is the local electron plasma frequency. The finite electron drift alters the effective group velocity of the Langmuir wave, and thus it modifies the peak amplitude of the resonance in a significant manner. For drifts toward the overdense side an amplitude enhancement is obtained, while for drifts toward the underdense side a severe quenching takes place. The effect is governed by a single scaled drift parameter, and significant modifications arise when its absolute value is greater than 1.

Subject Categories:

  • Plasma Physics and Magnetohydrodynamics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE