TY - JOUR
T1 - Nonlinear behaviour of a finite amplitude electron plasma wave, III. The sideband instability
JF - Proceedings of the Royal Society of London. A. Mathematical and Physical Sciences
JO - Proc R Soc Lond A Math Phys Sci
SP - 229
LP - 242
M3 - 10.1098/rspa.1978.0065
VL - 360
IS - 1701
AU -
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Y1 - 1978/03/21
UR - http://rspa.royalsocietypublishing.org/content/360/1701/229.abstract
N2 - 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.
ER -