Speaker
Mr
Stefan Gundacker
(CERN)
Description
The time resolution of photon detection systems is important for a wide range of applications in physics and chemistry. It impacts the quality of time-resolved spectroscopy of ultrafast processes and has a direct influence on the best achievable time resolution of time-of-flight detectors in high-energy and medical physics. For the characterization of photon detectors, it is important to measure their exact timing properties in dependence of the photon flux and the operational parameters of the photodetector and its accompanying electronics. We report on the timing of different types of photodetectors, i.e. SiPMs, dynode PMTs and MCP-PMTs, in dependence of their bias voltage, electronics threshold settings and the number of impinging photons. We used ultrashort laser pulses at 400nm wavelength with pulse duration below 200fs. We focus our studies on different types of SiPMs (Hamamatsu MPPC S10931-025P, S10931-050P and S10931-100P) with different SPAD sizes (25$\mu$m, 50$\mu$m and 100$\mu$m) coupled to the ultrafast discriminator amplifier NINO. We show that for the SiPMs, an optimum in the time resolution regarding bias and threshold settings can be reached. For the 50$\mu$m type, we achieve a single photon time resolution of better than 180ps sigma, and for saturating photon fluxes better than 10ps sigma.
Primary author
Mr
Stefan Gundacker
(CERN)
Co-authors
Mr
Benjamin Frisch
(CERN)
Dr
Bernhard Lang
(University of Geneva)
Dr
Eric Vauthey
(University of Geneva)
Dr
Etiennette Auffray
(CERN)
Dr
Hartmut Hillemanns
(CERN)
Mr
Nicolas Di Vara
(CERN)
Dr
Paul Lecoq
(CERN)
Dr
Pierre Jarron
(CERN)
Dr
Sandra Mosquera-Vazquez
(University of Geneva)
Dr
Thomas Meyer
(CERN)
