No abstract

-The results of experiments with a threering large-area diode performed on an MIG pulse generator are reported. The MIG generator allows electrical pulses up to 2 TW at FWHM 50-60 ns (1.2-1.4 TW and 80-90 ns in our experiments) to be produced at a matched load. In the operating mode of the generator, the current amplitude through the load is up to 2 MA (the current of a relativistic electron beam) at a diode voltage of ~ 500 kV. A large-area vacuum diode with three ring-shaped cathodes is used as a load. When the beam slows down on a condensed foil target, the parameters of the resulting source are the following: the mean energy of X-ray quanta is ~ 70 keV, irradiated area -500 cm 2 , FWHM -65 ns, and Xray radiation (10-100 keV) in the flux ~ 50%. It is shown that absorption of radiation by the target is significant at large angles to the diode axis.