Highly polarized electrons from superlattice photocathodes

Our collaboration group have continued the research to develop the high performance photocathode and the guns to produce the highly polarized electron beam for high energy accelerator physics. In this report, the experimental results obtained from the photocathodes with superlattice structures, such as, AlGaAs-GaAs, InGaAs-GaAs and InGaAs-AlGaAs are described.