Coherent interaction of the relativistic electron beam with the plasma and high-gradient accelerating fields generation

The results of the experimental investigations of the relativistic electron bunched-beam interaction with plasma are presented. The energy spectrum of the electron beam on the exit of the interaction chamber at energy 50 and 20 MeV was measured. Coherent interactions of the electron beam with a ultra-high frequency (UHF) plasma is investigated and indicated that in coherent conditions the great fields may be generated, that are driven by the sharp beam current dependence on the phase of the UHF wave. We have discovered a new coherent effect may be used for development of an accelerating module with a high gradient. The effect may be amplified with the help of a powerful parametric resonance. It may be useful for thermonuclear researches, where the plasma is heated up by a high current relativistic electron beam as well