Karlsruhe 2024 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 92: Detectors 8 (semiconductors)
T 92.4: Vortrag
Donnerstag, 7. März 2024, 16:45–17:00, Geb. 30.23: 2/1
Ultrafast timestamping of charged particles using a digital SiPM — •Stephan Lachnit1,2, Inge Diehl1, Finn Feindt1, Erika Garutti2, Karsten Hansen1, Frauke Poblotzki1, Daniil Rastorguev1,3, Simon Spannagel1, Tomas Vanat1, and Gianpiero Vignola1,4 — 1DESY, Hamburg, Germany — 2Universität Hamburg, Germany — 3Bergische Universität Wuppertal, Germany — 4Universität Bonn, Germany
Silicon Photo-Multipliers (SiPMs) have emerged as crucial semiconductor detectors in the realm of single-photon detection and timing. Traditionally analog devices, SiPMs are now evolving with the integration of digital readout techniques akin to monolithic active pixel sensors. This brings forth new possibilities such as full hitmap readout, pixel masking, and on-chip timestamping. In the context of High Energy Physics, the ultrafast O(10 ps) timestamping capabilities of digital SiPMs position them as compelling contenders for 4D tracking applications. However, this requires evaluating the performance of SiPMs in charge particle detection.
At DESY, a digital SiPM has been developed using LFoundry’s 150 nm CMOS process. In this contribution, the analysis of data from a testbeam at DESY-II using 4 GeV electrons is shown. A time resolution of (46 ± 5) ps for the direct detection of electrons at the center of the Single-Photon Avalanche Diode (SPAD) cells has been measured. Variations in response times were observed at the periphery of the SPAD cells.
Keywords: sipm; timing; 4D-tracking; monolithic; digital