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Title: Fast-timing microchannel plate photodetectors: design, fabrication and characterization

Abstract

We report a detailed design, fabrication, and characterization of 6 x 6 cm(2) fast timing photodetectors based on next-generation microchannel plates (MCPs). The whole assembly is made of low-cost borosilicate glass materials and hermetically sealed with a bialkali photocathode in a vacuum. The flexible photodetector design provides the potential of modifying individual components as well as the entire configuration to fit for different applications. A series of prototype MCP-photodetectors were fabricated following a step-by-step process including functionalization of glass capillary array through atomic layer deposition, MCP baking and scrubbing, photocathode deposition, and hermetic thermo-compression sealing. The prototype MCP-photodetectors exhibit electron gains well beyond 107 level with good relative uniformity. An excellent rise time of 439 ps, timing distribution root-mean-square at a single photoelectron mode of 105 ps, a timing resolution of 20 ps, and magnetic field tolerance up to 1.3 T were achieved for a photodetector with 10 mu m pore size MCPs, comparing to that of 536 ps, 205 ps, 63 ps, and 0.7 T for the one with 20 mu m pore size MCPs. Published under license by AIP Publishing.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science - Office of High Energy Physics; USDOE Office of Science - Small Business Innovation Research (SBIR) and Small Business Technology Transfer (STTR)
OSTI Identifier:
1560670
DOE Contract Number:  
AC02-06CH11357
Resource Type:
Journal Article
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 90; Journal Issue: 4
Country of Publication:
United States
Language:
English
Subject:
fast timing; gain; magnetic field tolerance; microchannel plate; photodetector fabrication; time characteristics; transit time spread

Citation Formats

Xie, Junqi, Demarteau, Marcel, May, Edward, Wagner, Robert, and Xia, Lei. Fast-timing microchannel plate photodetectors: design, fabrication and characterization. United States: N. p., 2019. Web. doi:10.1063/1.5063825.
Xie, Junqi, Demarteau, Marcel, May, Edward, Wagner, Robert, & Xia, Lei. Fast-timing microchannel plate photodetectors: design, fabrication and characterization. United States. doi:10.1063/1.5063825.
Xie, Junqi, Demarteau, Marcel, May, Edward, Wagner, Robert, and Xia, Lei. Mon . "Fast-timing microchannel plate photodetectors: design, fabrication and characterization". United States. doi:10.1063/1.5063825.
@article{osti_1560670,
title = {Fast-timing microchannel plate photodetectors: design, fabrication and characterization},
author = {Xie, Junqi and Demarteau, Marcel and May, Edward and Wagner, Robert and Xia, Lei},
abstractNote = {We report a detailed design, fabrication, and characterization of 6 x 6 cm(2) fast timing photodetectors based on next-generation microchannel plates (MCPs). The whole assembly is made of low-cost borosilicate glass materials and hermetically sealed with a bialkali photocathode in a vacuum. The flexible photodetector design provides the potential of modifying individual components as well as the entire configuration to fit for different applications. A series of prototype MCP-photodetectors were fabricated following a step-by-step process including functionalization of glass capillary array through atomic layer deposition, MCP baking and scrubbing, photocathode deposition, and hermetic thermo-compression sealing. The prototype MCP-photodetectors exhibit electron gains well beyond 107 level with good relative uniformity. An excellent rise time of 439 ps, timing distribution root-mean-square at a single photoelectron mode of 105 ps, a timing resolution of 20 ps, and magnetic field tolerance up to 1.3 T were achieved for a photodetector with 10 mu m pore size MCPs, comparing to that of 536 ps, 205 ps, 63 ps, and 0.7 T for the one with 20 mu m pore size MCPs. Published under license by AIP Publishing.},
doi = {10.1063/1.5063825},
journal = {Review of Scientific Instruments},
number = 4,
volume = 90,
place = {United States},
year = {2019},
month = {4}
}

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