A team of authors from Jinling Institute of Technology, Xi’an Institute of Optics and Fine Mechanics, North Night Vision Technology Company, Ltd. (China) have described a photomultiplier design based on a dynode system with microchannel plates (Dynode-MCP-PMT) with high collection efficiency and good time performance.

To obtain a tailless time distribution, a pair of uncoated MCPs are employed.  For a high collection efficiency, a dynode with two large openings is placed in front of the MCPs.  The dynode is designed as a spherical shape to prevent secondaries from escaping the multiplication system and assist them moving to the MCPs for further multiplication. A 3-D model is developed by CST Studio Suite to validate its feasibility.  Finite integral technique and Monte Carlo method are combined to simulate the photoelectron collection and multiplication processes.  Results predict that for the shielded Dynode-MCP-PMT, collection efficiency is expected to be 100%. Tailless transit time distributions are observed. Transit time spread of the photoelectrons achieves 3.7 ns.

Published in:  IEEE Transactions on Nuclear Science ( Volume: 69, Issue: 10, October 2022)

INSPEC Accession Number: 22259545

DOI: 10.1109 /TNS.2022.3204791

Publisher: IEEE