R. Ando et al., EXCITATION OF OSCILLATIONS WITH A BROAD FREQUENCY-SPECTRUM IN THE INTERACTION OF A HIGH-DENSITY RELATIVISTIC ELECTRON-BEAM WITH A PLASMA, Plasma physics reports, 23(11), 1997, pp. 964-970
A study is made of the nonlinear interaction of a relativistic electro
n beam with a plasma when the beam density is of the same order as the
plasma density. Under this condition, the onset of beam-plasma instab
ility leads to the excitation of oscillations with a broad frequency s
pectrum. The oscillation spectrum is continuous and extends to frequen
cies on the order of several plasma frequencies. The nonlinear dynamic
s of the instability is stochastic.