Test of a novel 2*2 multi-anode MCP-PMT  

作　　者：Ziwei Li Xin Li Ping Chen Cheng Li Yonglin Wei Xiaofeng Sai Jianbei Liu Ming Shao Jinshou Tian Hulin Liu 

机构地区：[1]State Key Laboratory of Particle Detection and Electronics,University of Science and Technology of China,Hefei 230026,China [2]Xi'an Institute of Optics and Precision Mechanics,CAS,Xi'an,China [3]Department of Modern Physics,University of Science and Technology of China,Hefei 230026,China

出　　处：《Radiation Detection Technology and Methods》2020年第4期472-477,共6页辐射探测技术与方法（英文）

基　　金：supported by the National Natural Sci-ence Foundation of China,Nos.11775217 and 11675172

摘　　要：Purpose Xi'an Institute of Optics and Precision Mechanics of CAS is developing a novel MCP-PMT with 2×2 matrix anode pixels with a time resolution of picosecond level.It is composed of a cermet shell,bi-alkali photocathode,and V-type cascade MCP layers.In order to study the method of measuring the characteristics of such MCP-PMT with picosecond time resolution,we develop a PMT test system to test its performance.Methods A voltage divider resistor circuit for the MCP-PMT is designed to meet the requirements of both high gain and fast time response.The test system includes a picosecond laser source in the single-photon mode,a high-bandwidth oscilloscope,and another fast MCP-PMT as reference.Full waveforms of PMT signals are collected and analyzed offline.The overall system time error is 26 ps.Results The test result shows that the gain of the MCP-PMT achieves 1 x 107.The transit time spread(TTS)of all channels is better than 60 ps(σ).The uniformity and crosstalk among adjacent channels are also studied by scanning each channel's response along the photocathode plane.Conclusions The MCP-PMT shows excellent timing performance and the potential of achieving better spatial resolution by further pixelation.

关 键 词：MCP-PMT Picosecond timing Performance test Cherenkov detection 

分 类 号：TL7[核科学技术—辐射防护及环境保护]