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Physics > Instrumentation and Detectors

arXiv:2411.09358 (physics)
[Submitted on 14 Nov 2024]

Title:Microlens-enhanced SiPMs

Authors:Guido Haefeli, Frederic Blanc, Esteban Currás-Rivera, Radoslav Marchevski, Federico Ronchetti, Olivier Schneider, Lesya Shchutska, Carina Trippl, Ettore Zaffaroni, Gianluca Zunica
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Abstract: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.
Comments: 8 pages, 11 figures
Subjects: Instrumentation and Detectors (physics.ins-det); High Energy Physics - Experiment (hep-ex)
Cite as: arXiv:2411.09358 [physics.ins-det]
  (or arXiv:2411.09358v1 [physics.ins-det] for this version)
  https://doi.org/10.48550/arXiv.2411.09358

Submission history

From: Ettore Zaffaroni [view email]
[v1] Thu, 14 Nov 2024 11:06:08 UTC (1,905 KB)
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