A single cavity accelerator for 1 MeV protons

Abstract

A 1 MeV proton injector of the ring-shaped phasotron model, designed and constructed at the Laboratory of Nuclear Problems at Dubna in 1960–1962 is described. Protons are accelerated in the gap of a toroidal cavity excited on the basic frequency of about 60 MHz by a self-excited oscillator. A cold cathode of the Penning discharge type is used as an ion source. Proton current of 10 mA per 20 μsec pulse is supplied by the injector at the repetition rate of 50 Hz.