DEVELOPMENT OF AN ADVANCED VOLUME-H- SOURCE FOR NEUTRAL BEAM APPLICATION

Based on recent experimental results made on the large and small multicusp volume H- sources, a new multicusp source has been designed to generate high-brightness H- or D- beams for high duty factor or dc operations. Cesium will be introduced into the source plasma to enhance the H- output current. Arrangements for reducing the electrons as well as capturing them in the preaccelerator electrodes will be incorporated into the new source geometry.