Proton Calorimetry/Experimental Runs/2020/Nov12

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First prototype DDC232 board with Hamamatsu S1337-16BR photodiodes exposed to darkness, small amounts of ambient daylight and a UV torch.

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, UV torch).

Notes

  • Each run took approximately 20,000,000 bytes of data, corresponding to about 240,000 samples.
  • Run 1-24 were 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
25 170 350 Photodiodes unplugged
26 170 150 Photodiodes unplugged
27 170 12.5 Photodiodes unplugged
28 170 350 Photodiodes unplugged, test mode
29 170 150 Photodiodes unplugged, test mode
30 170 12.5 Photodiodes unplugged, test mode
31 170 350 Photodiodes unplugged, repeat of run 25, changed to DDC232 board with S12915-16R photodiodes
32 170 350 Nighttime darkness measurement
33 170 350 Daytime darkness measurement
34 170 150 Daytime darkness measurement
35 170 12.5 Daytime darkness measurement
36 1000 350 Daytime darkness measurement
37 1000 150 Daytime darkness measurement
38 1000 12.5 Daytime darkness measurement
39 2000 350 Daytime darkness measurement
40 2000 150 Daytime darkness measurement
41 2000 12.5 Daytime darkness measurement
42 170 12.5 Repeat of run 35
43 170 350 Dec 4th, UV torch, daylight with curtains closed
44 170 350 Dec 4th, UV torch, nighttime with ambient light
45 170 350 Dec 4th, UV torch, darkness
46 170 350 Dec 4th, dark measurement
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