Dynamic characteristics of interaction of power fuel REB with thick anodes

When a focused high-current relativistic electron beam (REB) effecting anode intensive heating and anode evaporation occur, high pressures and temperatures in the region of a focal spot on the anode surface appear. An attempt has been made to obtain simple analytical expressions describing a substance state in the REB energy release region (pressure, temperature) and a recoil in pulse transmitted to a thick anode when anode evaporation. The calculations were carried out within the framework of a simple physical model. It was suggested that the size of the region heated by the beam is strictly limited with a certain diameter and the power is constant during the whole time of beam action. The calculations carried out were compared with experimental results obtained on the ''Kalmar'' accelerator at (2-8)x1010W power, 10-7s pulse duration and 0.5 MeV electron energy. Copper aluminium and lead anodes of 36 mm india and 5 mm thickness were used. A specific size of the region, where beam acc ation elerccorred, was within 1.1u-2.4 mm. It is shown that the theoretical and experimental data have the satisfactory agreement