Large area planar photocathode for MCP-based photodetectors

Journal Article · 06 December 2019 · Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment

DOI: https://doi.org/10.1016/j.nima.2019.163234 · OSTI ID:1604977

Xie, Junqi ^[1]; Attenkofer, Klaus ^[1]; Demarteau, Marcel ^[1]; Paramonov, Alexander ^[1]; Ronzhin, Anatoly ^[2]; Wagner, Robert ^[1]; Yusof, Zikri ^[1]

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1. Argonne National Lab. (ANL), Argonne, IL (United States)
2. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)

We report on the principle, design, fabrication, and characterization of a large-area planar bialkali photocathode. Herein, sequential photocathode growth process was investigated, and the growth parameters, especially the initial antimony layer thickness, were optimized. The source arrangement and configuration were also simulated and the preferred configuration was chosen for numerical and experimental studies. Photocathode with average QE of 18% and activation area of similar to 40 square inches was experimentally demonstrated, making it a candidate for MCP-based photodetector applications. Further improvements were also discussed to enhance the uniformity and QE value of the photocathodes.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States). Center for Nanoscale Materials
• Sponsoring Organization: USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
• Grant/Contract Number: AC02-06CH11357
• OSTI ID: 1604977
• Journal Information: Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment, Journal Name: Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment Journal Issue: C Vol. 955; ISSN 0168-9002
• Publisher: ElsevierCopyright Statement
• Country of Publication: United States
• Language: English