yield vs intensity and threshold

Photon multiplicity for different intensity of the PiLas laser and threshold value.

  • 50k triggers were used at each data point
  • photon counting was done for 5 ns window around main peak

Only first and last 3 columns of pixels are used (multiplicity renormalized to 4 columns):

Hit pattern for the half-masked MCP-PMT. Laser intensity 30%, threshold value - 1,2,3,4,5 mV (from left to right):

Hit pattern for the half-masked MCP-PMT. Threshold value is 2 mV, intensity - 15,20,30,40,50 % (from left to right):