Timing performance of a digital SiPM prototype measured with a picosecond injection laser
Open Access
- 1 June 2025
- journal article
- Published by IOP Publishing in Journal of Instrumentation
- Vol. 20 (06) , C06035
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.Keywords
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