摘要
A cesium telluride （Cs 2 Te） photocathode with a quantum efficiency of 13% at 253.7 nm （radiant incidence 200 μW/cm 2 ） 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.
A cesium telluride （Cs 2 Te） photocathode with a quantum efficiency of 13% at 253.7 nm （radiant incidence 200 μW/cm 2 ） 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.
基金
Supported by National Basic Research Programme of China (2002 CB713600)
