Timing performance of a digital SiPM prototype measured with a picosecond injection laser

Daniil Rastorguev; Inge Diehl; Karsten Hansen; Finn King; Stephan Lachnit; Simon Spannagel; Tomas Vanat; Gianpiero Vignola

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arXiv · 2505.02632

Timing performance of a digital SiPM prototype measured with a picosecond injection laser

Daniil Rastorguev·Inge Diehl·Karsten Hansen·Finn King·Stephan Lachnit·Simon Spannagel·Tomas Vanat·Gianpiero Vignola

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Abstract

The DESY digital silicon photomultiplier (dSiPM) is a monolithic detector based on complementary metal-oxide-semiconductor (CMOS) single-photon avalanche diodes (SPADs) and features a fully digital readout. The dSiPM prototype was characterized using a picosecond injection laser. Different contributions to the time resolution from both SPADs and digitization electronics are quantified. The dSiPM achieves a temporal resolution of approximately 50 ps under optimal conditions, while localized charge deposition with the laser revealed in-pixel variations of the time resolution linked to the SPAD layout. Combining fast timing with a pixelated readout, the device is a promising candidate for 4D-tracking detectors and other precision timing applications.

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Daniil Rastorguev, Inge Diehl, Karsten Hansen, Finn King, Stephan Lachnit, Simon Spannagel, Tomas Vanat, Gianpiero Vignola. 2025-05-05. Timing performance of a digital SiPM prototype measured with a picosecond injection laser. https://arxiv.org/abs/2505.02632

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