Development and testing of cost-effective, 6 cm×6 cm MCP-based photodetectors for fast timing applications

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• 作者：Jingbo Wang^a ; ^{wjingbo@anl.gov" class="auth_mail" title="E-mail the corresponding author} ; Karen Byrum^a ; Marcel Demarteau^a ; Jeffrey Elam^b ; Anil Mane^b ; Edward May^a ; Robert Wagner^a ; Dean Walters^a ; Lei Xia^a ; Junqi Xie^a ; Huyue Zhao^a
• 关键词：Photodetector ; Micro-channel plate ; MCP-PMT ; Single photoelectron ; Time resolution ; Position resolution
• 刊名：Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
• 出版年：2015
• 出版时间：21 December 2015
• 年：2015
• 卷：804
• 期：Complete
• 页码：84-93
• 全文大小：3266 K

文摘

Micro-channel plate (MCP)-based photodetectors are capable of picosecond level time resolution and sub-mm level position resolution, which makes them a perfect candidate for the next generation large area photodetectors. The large-area picosecond photodetector (LAPPD) collaboration is developing new techniques for making large-area photodetectors based on new MCP fabrication and functionalization methods. A small single tube processing system (SmSTPS) was constructed at Argonne National Laboratory (ANL) for developing scalable, cost-effective, glass-body, 6 cm×6 cm, picosecond photodetectors based on MCPs functionalized by Atomic Layer Deposition (ALD). Recently, a number of fully processed and hermitically sealed prototypes made of MCPs with 20 μm pores have been fabricated. This is a significant milestone for the LAPPD project. These prototypes were characterized with a pulsed laser test facility. Without optimization, the prototypes have shown excellent results: the time resolution is ~57 ps for single photoelectron mode and ~15 ps for multi-photoelectron mode; the best position resolution is ≤0.8 mm for large pulses. In this paper, the tube processing system, the detector assembly, experimental setup, data analysis and the key performance will be presented.