Abstract
Abstract
A Large Array of imaging atmospheric Cherenkov Telescopes
(LACT) will be constructed at the Large High Altitude Air Shower
Observatory site to explore the nature of PeV gamma-ray sources. The
cameras of LACT will use Silicon Photomultipliers (SiPMs) as the
photodetector. A dedicated test system was built to select SiPMs for
LACT. The characteristics of six SiPM models from three
manufacturers (Hamamatsu, Joinbon, and ON Semiconductor) were
evaluated. Based on the characteristics of the candidate SiPMs and
their preamplifiers, a Wiener-deconvolution algorithm is implemented
to correct the pileup of the SiPM output pulses. The measurement
methods and results for breakdown voltage, gain, dark count rate,
optical crosstalk, and afterpulsing of the candidate SiPMs are
reported in this article.