Scanning electron diffraction studies on alkali antimonide photocathodes, including the S20

Abstract

The authors present further results on the crystal structures of alkali antimonide photocathodes obtained from the scanning electron diffraction system reported previously (see abstr. A75195 of 1972 and abstr. A53166 1973). The first part describes investigations that have been carried out on the correlation between the crystal structures and photosensitivities of the following antimonide cathodes: caesium, rubidium, potassium, potassium-caesium, and sodium-potassium. The second part presents a review of previous work on the multi-alkali S20 photocathode, the initial SEDS results, and a possible model for the S20 photosurface.