Abstract
A cesium telluride (Cs2Te) photocathode with a quantum efficiency of 13% at 253.7 nm (radiant incidence 200 μW/cm2) is fabricated by tellurium and cesium vapor deposition onto a stainless-steel substrate. The cesium telluride cathode will be used to provide a high-brightness electron beam source for the 3+1/2 photo-injector at Peking University. The design of the system, the fabrication procedures and the preliminary experimental results are presented in this paper.
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