Collective processes excited by high-current relativistic electron beam propagation in neutral gas

As follows from the experiments, in the absence of the external magnetic field the collective processes play the most important part in relaxation of a high-current REB propagating in the neutral gas and plasma. The developing collective processes lead to intense microwave and X-radiation from the plasma relativistic beam modulation and emergence of fast electrons whose effective bremsstrahlung energy is up to 20 kev.