Feb 21 – 25, 2022
Vienna University of Technology
Europe/Vienna timezone

Time based energy discrimination and pileup recovery for analog SiPM readout

Not scheduled
Vienna University of Technology

Vienna University of Technology

Gusshausstraße 27-29, 1040 Wien
Recorded Presentation SiPM


Mr Nicolaus Kratochwil (CERN)


The development of solid state photodetectors likesilicon photomulipliers (SiPMs) has paved the way for a newgeneration of radiation detectors. By utilizing high frequency readout electronics it is possible to access information carried by the first few detected photons. This opens the door for a fully time based detector design without classical charge integration or time over threshold measurement of the full scintillation pulse. Analog SiPMs can be treated in a digital like approach by using two or more time thresholds. In order to validate the feasibility of time based energy discrimination several types of time based estimators were experimentally evaluated with commercially available SiPMs and LYSO:Ce crystals upon 511 keV γ-excitation. By measuring the SiPM signal rise time within the first 150 ps, an error rate below 10 % for photopeak discrimination was achieved.
Moreover, pile-up on the leading edge of the signal pulse induces a sudden change in the leading edge shape. Monitoring this shape fluctuation could prove crucial to identify pile-up at future high-luminosity colliders.

Primary author


Loris Martinazzoli (Universita & INFN, Milano-Bicocca (IT)) Stefan Gundacker (Institute for Experimental Molecular Imaging, RWTH Aachen University, Germany) Isabel Frank (Ludwig Maximilians Universitat (DE)) Marco Pizzichemi (Universita Milano-Bicocca (IT) and CERN) Etiennette Auffray (Cern)

Presentation materials