Proton Calorimetry/Experimental Runs/2020/Nov12

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First prototype DDC232 board with Hamamatsu S1337-16BR photodiodes exposed to small amounts of ambient daylight.

Aim: Investigate performance of DDC232 board with different integration times and full-scale range (FSR) out of detector setup and with uniform light source (daylight).

Notes

  • Each run took approximately 20,000,000 bytes of data, corresponding to about 240,000 samples.
  • Data was taken in afternoon and during sunset, therefore latter measurements had a smaller absolute amount of light. Measurements with 2000 us were essentially dark measurements.
  • Analysis involves histograms of measured values by channel and by photodiode, where channels corresponding to the same photodiode were summed before histogram. Additionally, evolution of measured value with sample number was also investigated.

Data saved in unix/pbt/data/ucl/20201112/

Run Integration time (us) FSR (pC) Notes
1 170 350
2 170 300
3 170 250 Large variation in sunlight 4 170 200 5 170 150 6 170 100 7 170 50 8 170 12.5 9 1000 350 10 1000 300 11 1000 250 12 1000 200 13 1000 150 14 1000 100 15 1000 50 16 1000 12.5 17 2000 350 18 2000 300 19 2000 250 20 2000 200 21 2000 150 22 2000 100 23 2000 50 24 2000 12.5