A new large area MCP-PMT for high energy detection

Lin Chen; Huizhen Yang; Xingchao Wang; Liping Tian; Dongyan Ding; Yunji Wang; Ke Ji; Pengxiang Zheng; Ting Luo; Chenye She

doi:10.1038/s41598-023-47818-x

Scientific Reports (Nov 2023)

A new large area MCP-PMT for high energy detection

Lin Chen,
Huizhen Yang,
Xingchao Wang,
Liping Tian,
Dongyan Ding,
Yunji Wang,
Ke Ji,
Pengxiang Zheng,
Ting Luo,
Chenye She

Affiliations

Lin Chen: School of Network and Communication Engineering, Jinling Institute of Technology
Huizhen Yang: School of Network and Communication Engineering, Jinling Institute of Technology
Xingchao Wang: School of Electronic Science and Engineering, Southeast University
Liping Tian: School of Network and Communication Engineering, Jinling Institute of Technology
Dongyan Ding: School of Network and Communication Engineering, Jinling Institute of Technology
Yunji Wang: School of Network and Communication Engineering, Jinling Institute of Technology
Ke Ji: School of Network and Communication Engineering, Jinling Institute of Technology
Pengxiang Zheng: School of Network and Communication Engineering, Jinling Institute of Technology
Ting Luo: School of Network and Communication Engineering, Jinling Institute of Technology
Chenye She: School of Network and Communication Engineering, Jinling Institute of Technology

DOI: https://doi.org/10.1038/s41598-023-47818-x
Journal volume & issue: Vol. 13, no. 1
pp. 1 – 8

Abstract

Read online

Abstract 20-inch Large area photomultiplier tube based on microchannel plate (MCP-PMT) is newly developed in China. It is widely used in high energy detection experiments such as Jiangmen Underground Neutrino Observatory (JUNO), China JinPing underground Laboratory (CJPL) and Large High Altitude Air Shower Observatory (LHAASO). To overcome the poor time performance of the existing MCP-PMT, a new design of large area MCP-PMT is proposed in this paper. Three-dimensional models are developed in CST Studio Suite to validate its feasibility. Effects of the size and bias voltage of the focusing electrodes and MCP configuration on the collection efficiency (CE) and time performance are studied in detail using the finite integral technique and Monte Carlo method. Based on the simulation results, the optimized operating and geometry parameters are chosen. Results show that the mean ratio of photoelectrons landing on the MCP active area is 97.5%. The acceptance fraction of the impinging photoelectrons is close to 100% due to the emission of multiple secondary electrons when hitting the MCP top surface. The mean transit time spread (TTS) of the photoelectrons from the photocathode is 1.48 ns.

Published in Scientific Reports

ISSN: 2045-2322 (Online)
Publisher: Nature Portfolio
Country of publisher: United Kingdom
LCC subjects: Medicine; Science
Website: https://www.nature.com/srep/

About the journal