Analysis of online measured spectral responses of NEA photocathodes

Zhiyuan Zong; Yunsheng Qian; Benkang Chang

doi:10.1117/12.444933

19 October 2001 Analysis of online measured spectral responses of NEA photocathodes

Zhiyuan Zong, Yunsheng Qian, Benkang Chang

Author Affiliations +

Proceedings Volume 4580, Optoelectronics, Materials, and Devices for Communications; (2001) https://doi.org/10.1117/12.444933
Event: Asia-Pacific Optical and Wireless Communications Conference and Exhibit, 2001, Beijing, China

Abstract

In this paper, on the base of explaining the importance of spectral response, the way to derive characteristic parameters of NEA photocathode from its spectral response is introduced. Then, an automatic spectral response recording system is described. The system is used to take spectral response curves during the activation procedure. For the first time, on-line measured spectral response curves of GaAs:Cs-O NEA photocathodes are presented. These curves indicate the typical variation in spectral response caused by the deposition of cesium and oxygen. By the way of comparing and analyzing these curves, many important parameters of photocathodes are obtained, and the reasons that cause the bad behavior of NEA photocathodes are discussed.

Citation Download Citation

Zhiyuan Zong, Yunsheng Qian, and Benkang Chang "Analysis of online measured spectral responses of NEA photocathodes", Proc. SPIE 4580, Optoelectronics, Materials, and Devices for Communications, (19 October 2001); https://doi.org/10.1117/12.444933

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