Speaker
Description
Abstract
Cs$_3$Sb photocathodes are promising electron sources for accelerators because of their high quantum efficiency (QE) under visible light, but the low robustness under low vacuum limits practical operation. In this work, Cs$_3$Sb photocathodes coated with CsBr were prepared and characterized. The experimental results indicate that the coating improved the pressure adaptability of the photocathodes by approximately two orders of magnitude, although it inevitably reduced the initial QE. After exposure, the QE of the coated photocathode can be recovered by annealing to its original value.
Funding Agency
Supported by National Natural Science Foundation of China (No.12275339), Science and Technology Innovation Plan of Shanghai (No.22ZR1470300), Youth Innovation Promotion Association of Chinese Academy
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