Pulsed optically pumped polarized H− ion source development

Results are presented of a pulsed optically pumped polarized H− ion source development for high energy accelerators. An atomic hydrogen beam intensity of 2×1018 atoms/s within the polarizer acceptance was obtained with an atomic H injector at BINP. A pulsed polarized H− ion current of about 10–20 mA should be obtainable using this injector. Limitations on beam characteristics due to space charge were studied. A polarization scheme to avoid space charge limitations is considered, in which charge exchange and spin exchange are combined.