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Microlens-enhanced SiPMs

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arxiv 2411.09358 v2 pith:JYH3LZYN submitted 2024-11-14 physics.ins-det hep-ex

Guido Haefeli , Frederic Blanc , Esteban Currás-Rivera , Radoslav Marchevski , Federico Ronchetti , Olivier Schneider , Lesya Shchutska , Carina Trippl
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Ettore Zaffaroni Gianluca Zunica
This is my paper · ORCID
classification physics.ins-dethep-ex
keywords conceptdetectorimprovedpixelregionresultssipmsactive
verification ladder T0 review T1 audit T2 compute T3 formal
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A novel concept to enhance the photo-detection efficiency (PDE) of silicon photomultipliers (SiPMs) has been applied and remarkable positive results can be reported. This concept uses arrays of microlenses to cover every second SiPM pixel in a checkerboard arrangement and aims to deflect the light from the dead region of the pixelised structure towards the active region in the center of the pixel. The PDE is improved up to 24%, external cross-talk is reduced by 40% compared to a flat epoxy layer, and single photon time resolution is improved. This detector development is conducted in the context of the next generation LHCb scintillating fibre tracker located in a high radiation environment with a total of 700'000 detector channels. The simulation and measurement results are in good agreement and will be discussed in this work.

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Cited by 1 Pith paper

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  1. Cryogenic operation of silicon photomultiplier arrays

    hep-ex 2025-02 conditional novelty 5.0 of 10

    Cryogenic operation from 300 K to 100 K preserves photon detection efficiency and gain of the tested SiPM arrays, while breakdown voltage, quenching resistance, recovery time, and correlated noise change in ways that ...

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