Experimental Studies of Explosive Instability in an Electron BeamPlasma System
Abstract
The explosive instability due to nonlinear waveparticle interaction has been observed experimentally. The slow space charge wave of the electron beam and the obliquely propagating electrostatic electron cyclotron harmonic wave interact nonlinearly with the electron beam and grow simultaneously, satisfying the resonant condition ω_{1}ω_{2}(k_{//1}k_{//2})v_{b}{=}ω_{c}. One wave is amplified exponentially by increasing the power of the other wave. The virtual wave has also been observed. The nonlinear waveparticle coupling coefficients are measured quantitatively from the spatial growth rate, and found to be in good agreement with theory.
 Publication:

Journal of the Physical Society of Japan
 Pub Date:
 September 1979
 DOI:
 10.1143/JPSJ.47.966
 Bibcode:
 1979JPSJ...47..966S
 Keywords:

 Electron Plasma;
 Magnetohydrodynamic Stability;
 Plasma Heating;
 Plasma Waves;
 PlasmaParticle Interactions;
 Cyclotron Radiation;
 Electron Beams;
 Kinetic Equations;
 Nonlinear Systems;
 Plasma Resonance;
 Plasma Turbulence;
 Wave Equations;
 Wave Interaction;
 Plasma Physics