This experiment uses Silicon Photo-Multiplers (SiPMs) which are an high density matrix (104=mm2) of Silicon avalanche photo-diodes (APDs). Silicon photo-multipliers, often called “SiPM” in the literature, are solid-state single-photon-sensitive devices based on Single-photon avalanche diode (SPAD) implemented on common silicon substrate. The Silicon Photo-multiplier (SiPM) is a sensor that addresses the challenge of sensing, timing and quantifying low-light signals down to the single-photon level. The silicon photo-multiplier (SiPM) is a radiation detector with extremely high sensitivity, high efficiency, and very low time jitter. It is based on reversed biased https://www.overleaf.com/project/5c758f0ec184c1445ee1719cp- n diodes and can directly detect light from near ultra-violet to near infrared. SiPMs are employed in all those applications where low light/radiation levels must be measured and quantified with high precision.