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Advances in OptoElectronics - Volume 2015 2015, Article ID 781327, 6 pages -

Research Article

School of Information and Electrical Engineering, Ludong University, Yantai 264025, China

School of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China

Received 13 June 2015; Accepted 13 August 2015

Academic Editor: Jung Y. Huang

Copyright © 2015 Honggang Wang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

To improve the noise performance of microchannel plate MCP, we have presented a method using the sine random signals with Poisson distribution as the noise-excitation for electron source. By using this method, the effective evaluation of noise characteristics of MCP has been implemented through measuring and analyzing its noise factor. The results have demonstrated that the noise factor of filmed MCP is lower than 1.8. Additionally, as the open area ratio and the input electron energy are 72% and 400 eV, respectively, the noise characteristics of unfilmed MCP are improved evidently. Moreover, larger open area ratio, higher input electron energy, and higher voltage across the MCP all can reduce effectively the noise factor within a certain range. Meanwhile, the ion barrier film extends the life of image tube but at the cost of an increased noise factor. Therefore, it is necessary that a compromise between the optimum thickness of ion barrier film, open area ratio, input electron energy, and voltage across the MCP must be reached.





Autor: Honggang Wang, Yujie Du, Yu Feng, Yang Lv, Xiaoming Hu, and Yunsheng Qian

Fuente: https://www.hindawi.com/



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