Single electron counting using a dual MCP assembly

Research paper by Yuzhen Yang, Shulin Liu, Tianchi Zhao, Baojun Yan, Peiliang Wang, Yang Yu, Xiangcui Lei, Luping Yang, Kaile Wen, Ming Qi, Yuekun Heng

Indexed on: 14 Jun '16Published on: 11 Jun '16Published in: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment


The gain, pulse height resolution and peak-to-valley ratio of single electrons detected by using a Chevron configured Microchannel Plate (MCP) assembly are studied. The two MCPs are separated by a 280 µm gap and are biased by four electrodes. The purpose of the study is to determine the optimum bias voltage arrangements for single electron counting. By comparing the results of various bias voltage combinations, we conclude that good performance for the electron counting can be achieved by operating the MCP assembly in saturation mode. In addition, by applying a small reverse bias voltage across the gap while adjusting the bias voltages of the MCPs, optimum performance of electron counting can be obtained.

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