Ribbon REB research on 0.7 MJ generator U-2

The paper presents the experimental results on generation of a microsecond electron beam with a cross section 4×140 cm in a magnetically insulated diode at 1 MV voltage, its transport in a slit vacuum channel with 0.5T guiding magnetic field and, finally, a transformation of the ribbon beam to a cylindrical one. The first step of the experimental studies has been carried out at the energy content in the capacitor storage of the U-2 generator up to 200 kJ. At the second step of the experiments a new capacitor storage of doubled energy content has been added to the operated one and the investigations have been carried out at the 0.7 MJ pulse generator.