Pulse response of the GaAs/GaAsP superlattice photocathode

摘要

Pulse responses of different materials commonly used as electron sources in photoinjectors have been determined. Thin film photocathodes, such as strained GaAs/GaAsP superlattice and K2CsSb, produce fast responses. The emission intensity at time scales comparable with the acceptance of electron accelerators is found to be reasonably low, which is an advantage for operation at high beam powers. The temporal responses of these cathodes are compared with the response of bulk GaAs. (C) 2022 Author(s).