Development of a 100-ma Proton Source and Lens System for the Bevatron Mark-II Injector

Abstract

A Von Ardenne-type ion source and lens system has been developed for use as a preinjector to the 18-Mev strong-focusing linear accelerator. Proton beams of 120 ma at an ion production efficiency of 83% have been obtained. A magnetic beam-confining system has been built, and a beam of 85 ma has been transported 82 in. The beam energy was 370 kev, and its emittance was 100 mrad-mm. The beam diameter was 1 cm. This is within the linear accelerator's calculated acceptance of 179 mrad-mm.