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