Development and tests of WLS plates for Outer Detector of Hyper-Kamiokande

This paper describes measurements of photosensing units developed for the Outer Detector of Hyper-Kamiokande to increase the effective acceptance of Cherenkov radiation. The photosensing unit consists of a photomultiplier and a wavelength shifting plate optically coupled to it. Plates doped with dif...

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Bibliographic Details
Published in:Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment Accelerators, spectrometers, detectors and associated equipment, 2023-01, Vol.1045, p.167543, Article 167543
Main Authors: Kudenko, Y., Khotjantsev, A., Mineev, O., Yershov, N.
Format: Article
Language:English
Subjects:
Neutrino oscillations
Photomultipliers
Water Cherenkov detector
Wavelength shifting plates
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Summary:This paper describes measurements of photosensing units developed for the Outer Detector of Hyper-Kamiokande to increase the effective acceptance of Cherenkov radiation. The photosensing unit consists of a photomultiplier and a wavelength shifting plate optically coupled to it. Plates doped with different fluors and covered by different reflectors were tested using UV LED light sources in air and water. The effects of wavelength shifting fluors, side reflectors, water interface, and shaping of optical coupling are studied. Results of measurements of the light yield and its uniformity are presented.
ISSN:0168-9002
1872-9576
DOI:10.1016/j.nima.2022.167543