RESEARCH NOTE: Explosive instabilities in an electron beam plasma
Abstract
The generation of lowfrequency oscillations by the explosive instabilities involving negativeenergy or zeroenergy waves in an electron beam plasma is discussed. A timeaveraged system of fluid equations is used on considering nonlinear wave interactions in a uniform plasma including a rapid monoenergetic electron beam having low density. The interaction of waves far from the linear stability boundary is considered along with the nonlinear stage of the instability. It is found that an electron beam plasma is explosively unstable over a wide range of kspace. The characteristic time of a nonlinear process may be shortened if one of the coupled waves is near the linear stability boundary. Intense lowfrequency oscillations are observed to be generated by explosive instabilities.
 Publication:

Plasma Physics
 Pub Date:
 March 1978
 DOI:
 10.1088/00321028/20/3/013
 Bibcode:
 1978PlPh...20..293D
 Keywords:

 Electron Beams;
 Magnetohydrodynamic Stability;
 Plasma Oscillations;
 PlasmaParticle Interactions;
 Coupled Modes;
 Electron Plasma;
 Nonlinear Systems;
 Plasma Physics