Preprint

PUBDB-2022-07316

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png The Wavelength-Shifting Optical Module

Bastian-Querner, B. ; Binn, L. S. ; Böser, S. ; Brostean-Kaiser, J.DESY* ; Hebecker, D.Extern*DESY* ; Helbing, K. ; Karg, T.DESY* ; Köpke, L. ; Kowalski, M.DESY* ; Peiffer, P. ; Pollmann, A. (Corresponding author) ; Rack-Helleis, J. ; Rongen, M. ; Schlickmann, L. ; Thomas, F. ; Vocke, A.

2022

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Please use a persistent id in citations: doi:10.3204/PUBDB-2022-07316

Report No.: arXiv:2112.12258

Abstract: The Wavelength-shifting Optical Module (WOM) is a novel photosensor concept for the instrumentation of large detector volumes with single-photon sensitivity. The key objective is to improve the signal-to-noise ratio, which is achieved by decoupling the photosensitive area of a sensor from the cathode area of its photomultiplier tube (PMT). The WOM consists of a transparent tube with two PMTs attached to its ends. The tube is coated with wavelength-shifting paint that absorbs ultraviolet photons with nearly 100% efficiency. Depending on the environment, e.g., air (ice), up to 73% (41%) of the subsequently emitted optical photons can be captured by total internal reflection and propagate towards the PMTs, where they are recorded. The optical properties of the paint, the geometry of the tube, and the coupling of the tube to the PMTs have been optimized for maximal sensitivity based on theoretical derivations and experimental evaluations. Prototypes were built to demonstrate the technique and to develop a reproducible construction process. Important measurable characteristics of the WOM are the wavelength-dependent effective area, the transit time spread of detected photons, and the signal-to-noise ratio. The WOM outperforms bare PMTs, especially with respect to the low signal-to-noise ratio with an increase of a factor up to 8.9 in air (5.2 in ice). Since the gain in sensitivity is mostly in the UV regime, the WOM is an ideal sensor for Cherenkov and scintillation detectors.

Keyword(s): neutrino detectors ; photon detection ; wavelength-shifting ; UV sensitivity ; low noise ; large sensitive area ; photomultiplier tubes

Note: Accepted by Sensors, 20 pages

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Contributing Institute(s):

1. IceCube+NG (Z_ICE)

Research Program(s):

1. 613 - Matter and Radiation from the Universe (POF4-613) (POF4-613)

Experiment(s):

1. No specific instrument

Appears in the scientific report 2022

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Database coverage:
; ; Published

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Linked articles:

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Journal Article Bastian-Querner, B. ; Binn, L. S. ; Böser, S. ; Brostean-Kaiser, J.DESY* ; Hebecker, D.Extern*DESY* ; Helbing, K. ; Karg, T.DESY* ; Köpke, L. ; Kowalski, M.DESY* ; Peiffer, P. ; Pollmann, A. (Corresponding author) ; Rack-Helleis, J. ; Rongen, M. ; Schlickmann, L. ; Thomas, F. ; Vocke, A.
The Wavelength-Shifting Optical Module
Sensors 22(4), 1385 (2022) [10.3390/s22041385]2022     Files  Fulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

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