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Proceedings Paper

Study on the parameters of surface potential barrier of NEA GaAs photocathode
Author(s): Jun Niu; Dayong Huang; Yijun Zhang; Benkang Chang
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Paper Abstract

According to the ratio of the maximum values of photocurrents arising during the single Cs activation and the Cs-O activation phase for NEA GaAs photocathode, and combining the theoretical energy distributions of the electrons tunneling through the single and double potential barriers, a new method for evaluating the parameters of surface potential barrier of NEA GaAs photocathode was presented. The results obtained by this method greatly accord with the double-dipole model theory, and are in agreement with the results obtained by fitting the experimental curve for electrons energy distribution. The method is simple and available, and enriches one cheap approach for evaluating the activation effect and the surface characteristics of NEA GaAs photocathodes.

Paper Details

Date Published: 28 October 2011
PDF: 7 pages
Proc. SPIE 8205, 2011 International Conference on Photonics, 3D-Imaging, and Visualization, 82050Q (28 October 2011); doi: 10.1117/12.906121
Show Author Affiliations
Jun Niu, Institute of Technology Nanyang (China)
Dayong Huang, Institute of Technology Nanyang (China)
Yijun Zhang, Nanjing Univ. of Science and Technology (China)
Benkang Chang, Nanjing Univ. of Science and Technology (China)


Published in SPIE Proceedings Vol. 8205:
2011 International Conference on Photonics, 3D-Imaging, and Visualization
Egui Zhu, Editor(s)

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