Proton Calorimetry/Experimental Runs/2020/Nov12
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).
- 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|
|3||170||250||Large variation in sunlight|
|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|