MPPC models: S13081-050CS(X1), 4 pieces

• Operation voltage ~ 54.8V

• MPPC characteristics (noise, noice coincidence, electric gain)
• Speed of light in the optical fibers/ Concept of TOF. We need to use very fast optical pulsing for this measurement to get more precise measurement. Will try to use LED-driven Beacon to get a pulse in ~ 2-4ns width
• Cosmic ray muons: rate, and light yield

• Oscilloscope for signal recording and digitalized
  • It is connected via Ethernet and allowed to remote control from a PC
  • PC (IFIRSE #5, Ubuntu) is allocated
• 4 pieces of single MPPC
• DC PS for MPPC
• Circuit board to be soldered by students, to provide voltage and get the signals
• For LED Beacon, need other DC PS and Analog Discovery as function/waveform generator for trigger
• Plastic scintillator and wavelength shifting fiber
• Optical beam splitter and optical connectors

• Low operation voltage (~53V - 70V)
• High multiplication ratio (gain) (1e → ~10⁶e)
• High photon detection efficiency (up to ~50% at peak sensitivity wavelength)
• Fast response (a few nanosecond) and good time resolution
• Wide spectral response range (wavelength ~270nm - 900nm)
• Not affected by magnetic fields
• Highly resistant to mechanical shocks, and does not suffer from “burn-in” by incident light saturation

• All the pixels have the same structure
• When one photon come to a pixel in the MPPC, it will produce a pulse

• MPPC technical note https://www.hamamatsu.com/content/dam/hamamatsu-photonics/sites/documents/99_SALES_LIBRARY/ssd/mppc_kapd9008e.pdf
• LED nano beacon https://www.sciencedirect.com/science/article/pii/S0168900222005174