Stability of transmission-mode GaAs photocathodes in an ultrahigh vacuum system

Xin Guo; Feng Shi; Zhifeng Xu; Hui Liu; Hongjin Qiu; Wujun Huang; Liang Liu; Pu Wang; Gangcheng Jiao

doi:10.1117/12.2587040

12 March 2021 Stability of transmission-mode GaAs photocathodes in an ultrahigh vacuum system

Xin Guo, Feng Shi, Zhifeng Xu, Hui Liu, Hongjin Qiu, Wujun Huang, Liang Liu, Pu Wang, Gangcheng Jiao

Proceedings Volume 11763, Seventh Symposium on Novel Photoelectronic Detection Technology and Applications; 117634Q (2021) https://doi.org/10.1117/12.2587040
Event: Seventh Symposium on Novel Photoelectronic Detection Technology and Application 2020, 2020, Kunming, China

Abstract

In order to explore the stability of transmissive GaAs photocathode in ultra-high vacuum system, the activation experiment and re-caesiation experiment of transmissive GaAs photocathode were carried out, and the photocurrent curves after CsO activation and after re-caesiation were tested. Experiments show that high and low temperature thermal cleaning is conducive to CsO deposition and forms a stable structure to improve the photoelectric emission capability and stability of the transmissive GaAs photocathode. Although re-caesiation activation can partially restore the photoemission efficiency of the transmissive GaAs photocathode, it will reduce the stability of the activation layer and shorten the lifetime of the transmissive GaAs photocathode.

Citation Download Citation

Xin Guo, Feng Shi, Zhifeng Xu, Hui Liu, Hongjin Qiu, Wujun Huang, Liang Liu, Pu Wang, and Gangcheng Jiao "Stability of transmission-mode GaAs photocathodes in an ultrahigh vacuum system", Proc. SPIE 11763, Seventh Symposium on Novel Photoelectronic Detection Technology and Applications, 117634Q (12 March 2021); https://doi.org/10.1117/12.2587040

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