Parametric Coexcitation of Ion-Acoustic Waves and Electron Plasma Waves by a High Frequency Electric Field,
Abstract
The basic theory of parametric coexcitation of ion-acoustic and electron plasma waves by a high frequency electric field is reviewed. Numerical calculations show that plasma-neutral collisions and steady state drift velocities have a significant influence on the interaction. Parametric excitation of ionacoustic waves is observed experimentally in a helium dc discharge. The observations indicate that the radial density profile of the dc discharge modifies the parametric effect. In the absence of an applied field, unstable electron drift-excited ion-acoustic waves are experimentally observed. These waves are found to satisfy the dispersion relation for a plasma consisting of He(+) and He 2(+). (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1971
- Accession Number
- AD0733857
Entities
People
- David William Stowe
Organizations
- University of Illinois Urbana–Champaign