APD (Avalanche Photo Diode) is a photodetector used by NOvA experiment to detect the
scintillator light. It has 32 channels and works with gain of ~100. Operating temperature
of NOvA APDs is -15 C.
APD voltage-current properties were measure using SM00 sourcemeter and compared with original Hamamatsu measurement.
SiPM (Silicon photomultiplier) is used as a light detector for DUNE prototypes.
First SiPM measurements at FZU compared with previous measurements made in Italy.