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Development of Preparation Systems with K2CsSb Photocathodes and Study on the Preparation Process

  • 1Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049

  • 2Key Laboratory of Particle Acceleration Physics and Technology, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049

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  • Received Date: September 25, 2018
  • Published Date: January 31, 2019
    Abstract
  • The next generation of advanced light sources requires photons with large average flux and high brightness, which needs advanced electron gun matched with excellent photocathode materials. K2CsSb photocathode has the advantages of high quantum efficiency, long lifetime and instantaneous response. This study introduces the design of a set of K2CsSb photocathode preparation systems and detailed preparation process of K2CsSb photocathodes, including sequential deposition process and co-deposition process, and finally develops a K2CsSb photocathode. The influence of laser power on the quantum efficiency is also investigated.
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