Study of URT-1M accelerator in submicrosecond operation

Abstract

The purpose of this work was to investigate the operation of the URT-1M accelerator with a power system without SOS switch. The approaches used in the high-voltage pulse generation system of this accelerator allow generating a pulse with an amplitude of up to 500 kV, a duration of ~450 ns and a supply repetition rate up to 50 pps during discharge of the second circuit capacitor. It was found that in this mode, an accelerator with a metal dielectric cathode works stably at a charging voltage of up to 35kV (accelerating ~350 kV). Further increase of voltage is limited by breakdown of feedthrough vacuum insulator with shielding of dielectric surface.