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Scanning a Silicon Photomultiplier with a Laser Beam

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Abstract

The Silicon Photomultiplier (SiPM) is a novel semiconducting photodetector which can detect single photons. It consists of many microcells (pixels) operating in the so-called Geiger mode. At present, there are two principal designs among such devices: surface pixel and deeply buried pixel (microwell) structures. The cellular structure decreases the device’s effective photosensitive area, expressed in terms of the geometrical fill factor. It is very important to take it into account when developing new constructions with high pixel densities that are necessary for increasing the dynamic range. It is believed that the fill factor of deep microwell SiPMs is close to unity. In this work, the technique and results of studying the zonal response of different SiPMs by scanning (moving) with micron laser spot are presented. It is shown that the geometrical fill factor of the deep microwell SiPM is less than 100% when detecting the red light (λ = 632 nm).

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ACKNOWLEDGMENTS

We are very grateful to Z.V. Krumshtein (deceased) (Joint Institute for Nuclear Research) for his organization and great contribution to these investigations. We also thank in the name of T.V. Tetereva the Dubna branch of the Scientific and Research Institute of Nuclear Physics, Moscow State University, for the possibility of carrying out investigations on a confocal microscope. We are grateful to Prof. A.G. Olshevskii, V.V. Chalyshev, and I.E. Chirikov-Zorin (Joint Institute for Nuclear Research) for help and valuable advice when preparing this work. We are also very grateful to Prof. Z.Ya. Sadygov (Joint Institute for Nuclear Research) for presenting samples and drawings, as well as to A.V. Rybnikov (Joint Institute for Nuclear Research) for assistance in preparing the paper.

Funding

These investigations were supported by grants from an plenipotentiary of the Czech Republic at the Joint Institute for Nuclear Research in 2006–2014, as well as by a grant from the JINR–Czechia 2006–2014 Cooperation Program.

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Authors and Affiliations

  1. Joint Institute for Nuclear Research, 141980, Dubna, Moscow oblast, Russia

    N. V. Anfimov & Yu. S. Kovalev

  2. Institute of Particle and Nuclear Physics, Faculty of Mathematics and Physics, Charles University, 121 16 , Praha 2, Czech Republic

    V. Vorobel & P. Kodyš

Authors
  1. N. V. Anfimov
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  2. V. Vorobel
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  3. Yu. S. Kovalev
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  4. P. Kodyš
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Correspondence to N. V. Anfimov.

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Translated by A. Nikol’skii

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Anfimov, N.V., Vorobel, V., Kovalev, Y.S. et al. Scanning a Silicon Photomultiplier with a Laser Beam. Phys. Part. Nuclei Lett. 16, 820–825 (2019). https://doi.org/10.1134/S1547477119060025

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  • DOI: https://doi.org/10.1134/S1547477119060025

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