Abstract
The brightness of a photoelectron injector is fundamen- tally limited by the mean longitudinal and transverse energy distributions of the photoelectrons emitted from its photo- cathode, and the electron beam brightness is increased sig- nificantly if the mean values of these quantities are reduced. ASTeC have commissioned a Transverse Energy Spread Spectrometer (TESS - an experimental facility designed to measure these transverse and longitudinal energy distribu- tions) which can be used for III-V semiconductor, alkali antimonide/telluride and metal photocathode research (1). GaAs photocathodes were activated in our photocathode preparation facility (PPF) (2,3), then transferred to TESS under XHV conditions and progressively degraded through controlled exposure to oxygen. We present commission- ing data and initial measurements showing the evolution of the transverse energy distribution of electrons from GaAs photocathodes as a function of their degradation state.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
