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
![](/~rdzhigad/data/prt/lab/other/multvsth_nocutoff.png)
Only first and last 3 columns of pixels are used (multiplicity renormalized to 4 columns):
![](/~rdzhigad/data/prt/lab/other/multvsth_3pixcutoff.png)
Hit pattern for the half-masked MCP-PMT. Laser intensity 30%, threshold value - 1,2,3,4,5 mV (from left to right):
![](/~rdzhigad/data/prt/lab/other/mcp0_30_600.png)
![](/~rdzhigad/data/prt/lab/other/mcp0_30_1200.png)
![](/~rdzhigad/data/prt/lab/other/mcp0_30_1800.png)
![](/~rdzhigad/data/prt/lab/other/mcp0_30_2400.png)
![](/~rdzhigad/data/prt/lab/other/mcp0_30_3000.png)
Hit pattern for the half-masked MCP-PMT. Threshold value is 2 mV, intensity - 15,20,30,40,50 % (from left to right):
![](/~rdzhigad/data/prt/lab/other/mcp0_15_1200.png)
![](/~rdzhigad/data/prt/lab/other/mcp0_20_1200.png)
![](/~rdzhigad/data/prt/lab/other/mcp0_30_1200.png)
![](/~rdzhigad/data/prt/lab/other/mcp0_40_1200.png)
![](/~rdzhigad/data/prt/lab/other/mcp0_50_1200.png)