PT - JOURNAL ARTICLE
AU -
AU -
AU -
AU -
TI - Nonlinear behaviour of a finite amplitude electron plasma wave, III. The sideband instability
DP - 1978 Mar 21
TA - Proceedings of the Royal Society of London. A. Mathematical and Physical Sciences
PG - 229--242
VI - 360
IP - 1701
4099 - http://rspa.royalsocietypublishing.org/content/360/1701/229.short
4100 - http://rspa.royalsocietypublishing.org/content/360/1701/229.full
SO - Proc R Soc Lond A Math Phys Sci1978 Mar 21; 360
AB - Computations of the evolution of the electron distribution function in a plasma subsequent to the excitation of a constant finite amplitude electron plasma wave show that the system is stable for plasma parameters for which under experimental conditions the sideband instability is found to be excited. When the time (or space) variation of wave amplitude is included a group of particles initially trapped is detrapped and then behaves like an electron beam passing through the plasma. The experimental dispersion of test waves in a low density plasma is compared with theoretical predictions for parameters given by the detrapping model. Further, measurements of the electron distribution function in the presence of a finite amplitude wave as a function of position, wave amplitude, and wave frequency, show features which are consistent only with a detrapped beam.