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TY - CONF AU - Saha, P. AU - Chubenko, O. AU - Gevorkyan, G.S. AU - Kachwala, A.H. AU - Karkare, S.S. AU - Knill, C.J. AU - Montgomery, E.J. AU - Padmore, H.A. AU - Poddar, S. ED - Liu, Lin ED - Byrd, John M. ED - Neuenschwander, Regis T. ED - Picoreti, Renan ED - Schaa, Volker R. W. TI - Optical and Surface Characterization of Alkali-Antimonide Photocathodes J2 - Proc. of IPAC2021, Campinas, SP, Brazil, 24-28 May 2021 CY - Campinas, SP, Brazil T2 - International Particle Accelerator Conference T3 - 12 LA - english AB - Alkali-antimonides, characterized by high quantum efficiency and low mean transverse energy in visible light, are excellent electron sources to drive x-ray free electron lasers, electron cooling and ultrafast electron diffraction applications etc. Existing studies of alkali-antimonides have focused on quantum efficiency and emittance, but information is lacking on the fundamental aspects of the electronic structure, such as the energy gap of the semiconductor and the density of defects as well as the overall nano-structure of the materials. We are, therefore, conducting photoconductivity measurements to measure fundamental semiconductor properties as well as using atomic force microscope (AFM) and kelvin probe force microscope (KPFM) to measure the nanostructure variations in structure and surface potential. PB - JACoW Publishing CP - Geneva, Switzerland SP - 4037 EP - 4040 KW - cathode KW - electron KW - photon KW - emittance KW - vacuum DA - 2021/08 PY - 2021 SN - 2673-5490 SN - 978-3-95450-214-1 DO - doi:10.18429/JACoW-IPAC2021-THPAB142 UR - https://jacow.org/ipac2021/papers/thpab142.pdf ER -