New results of the full scale ribbon beam experiments on U-2 device

The paper presents the experimental results on generating and transforming the ribbon (3.5×130cm) beam with the electron energy 1 MeV, beam current up to 7kA and pulse duration 8 µs. 70% efficiency of the energy transfer from a capacitor storage to 0.4MJ ribbon beam has been obtained. The similar efficiency has been also achieved for the transformation of the ribbon beam to a compressed circular one at the optimal conditions. Measurements have shown an angular spread of the compressed beam is less than 10 0 .