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Proceedings Paper

The light-trap: a novel concept for a large SiPM-based pixel
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Paper Abstract

Many applications in high energy astrophysics, particle physics or medical imaging demand covering a large detection area with fast photosensors sensible to near-UV light. The use of Silicon photomultipliers (SIPMs) for such applications is restricted due to their sensitivity to unwanted wavelengths and mainly due to their limited physical area, increasing the cost and readout complexity of a camera. We propose to solve these drawbacks by building a Light-Trap, a low-cost pixel consisting on a SiPM attached to a PMMA disk doped with a wavelength shifter (WLS). Light in the near-UV band absorbed by the WLS is optically trapped inside the disk volume until it reaches the SiPM. The pixel collects photons over a much larger area than standard SiPMs, while being sensitive only in a desired wavelength range, which can be selected to match the application requirements. We introduce the Light-Trap principles and discuss results from laboratory measurements and Monte Carlo simulations.

Paper Details

Date Published: 9 September 2019
PDF: 10 pages
Proc. SPIE 11088, Optical Sensing, Imaging, and Photon Counting: From X-Rays to THz 2019, 110880L (9 September 2019); doi: 10.1117/12.2530575
Show Author Affiliations
D. Guberman, Istituto Nazionale di Fisica Nucleare (Italy)
J. Cortina, Ctr. de Investigaciones Energticas, Medioambientales y Tecnolgicas (Spain)
J. E. Ward, Institut de Física d'Altes Energies, BIST (Spain)
E. Do Souto Espiñera, Institut de Física d'Altes Energies, BIST (Spain)
A. Hahn, Max-Planck-Institut für Physik (Germany)
D. Mazin, Max-Planck-Institut für Physik (Germany)
Univ. of Tokyo Kashiwa-no-ha (Japan)

Published in SPIE Proceedings Vol. 11088:
Optical Sensing, Imaging, and Photon Counting: From X-Rays to THz 2019
Oleg Mitrofanov, Editor(s)

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