Proton Calorimetry/Experimental Runs/2020/Nov12

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
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	Darkness measurement