Collective interactions of monoenergetic high-energy relativistic electron beam with a dense plasma

It was theoretically shown [1-3] that during a collective electron beam-plasma interaction, HF - oscillations may develop in a plasma at a frequency W_p; the beam energy taken away to initiate these oscillations may be very high. Since high-current relativistic electron beams (REB) seem to be the most energetic,it would be reasonable to use them in order to obtain highly intensive HF-oscillations, provided that there is an efficient beam-plasma interaction.