Speaker
Veronica Regazzoni
(University of Trento)
Description
In this work, we present the linearity characterization of the ultra-high density SiPM technology (RGB UHD), recently developed at Fondazione Bruno Kessler (FBK). This technology features a very small cell pitch ranging from 7.5 to 12.5 µm giving a cell density from 20530 to 7400 cells/mm2. The high SPAD density is very important to improve the linearity of the SiPM in applications such as high-energy Gamma-ray spectroscopy and prompt gamma imaging (PGI) in proton therapy. Moreover, the small cell size provides a n ultra-fast recovery time, in the order of a few of ns for the smallest cells. A short recovery time reduces pile-up in high-rate application such as PGI. Using a 22Na source, we have measured a non-linearity (NL) of less than 0.5% at 1.274 MeV, for all the cell sizes. In this work, we will present the measurement of the NL of the UHD SiPMs for the PGI application, using a pulsed light source to simulate an energy range from 0.5 MeV to 20 MeV.
Primary author
Veronica Regazzoni
(University of Trento)
Co-authors
Alberto Gola
(Fondazione Bruno Kessler)
Alessandro Ferri
(Fondazione Bruno Kessler)
Claudio Piemonte
(Fondazione Bruno Kessler)
Fabio Acerbi
(Fondazione Bruno Kessler)
Gaetano Zappalà
(University of Trento)
Giovanni Paternoster
(Fondazione Bruno Kessler)
Nicola Zorzi
(Fondazione Bruno Kessler - FBK)
