Proton Calorimetry/Experimental Runs/2020/Oct23
23 Oct 2020
LED injected light measurements
Setup: - scintillator sheets number from top to bottom in vice/enclosure sequence: 51, 31, 50, 52, 34, 44, 53, 47, 33, 54, 46, 42, 55, 45, 38, 36, 43, 32, 48, 41, 8, 39, 40, 37, 35, 49, 9 + other sheet as fillers - 16 Photodiodes covering the sheets sequence 42, 55, 45, 38, 36, 43, 32, 48, 41, 8, 39, 40, 37, 35, 49, 9. - Optical fibre used with optical gel to couple LED to scintillator sheet n. 8 - painted side of the stack with fibre holes on top, PDs placed 90deg w.r.t. the injection side.
Aim: Take large statistics runs to caracterise photodiodes. Plan is to insert light into sheet n. 8 and measure the light output with different photodiodes arrays, integration time and full scale.
list of runs in this file unix/pbt/data/ucl/20201023/20201023_LEDandADCBoard.xlsx data saved in unix/pbt/data/ucl/20201023/
| Run | LED Voltage (V) | LED Period (us) | Width (ns) | Sensor Full Well Mode | Illuminated sheet | DDC int time | DDC Full scale | DDC Board and photodiodes | Notes |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 4.5 | 1 | 300 | - | 8 | 170us | 350pC FSR | Saad's (PDs: S1337-16BR) | |
| 2 | 4.5 | 1 | 300 | - | 8 | 170us | 12.5pC FSR | Saad's (PDs: S1337-16BR) | |
| 3 | 4.5 | 1 | 300 | - | 8 | 170us | 200pC FSR | Saad's (PDs: S1337-16BR) | |
| 4 | 4.5 | 1 | 300 | - | 8 | 2000us | 350pC FSR | Saad's (PDs: S1337-16BR) | |
| 5 | 4.5 | 1 | 300 | - | 8 | 2000us | 200pC FSR | Saad's (PDs: S1337-16BR) | |
| 6 | 4.5 | 1 | 300 | - | 8 | 2000us | 50pC FSR | Saad's (PDs: S1337-16BR) | |
| 7 | 4.5 | 1 | 300 | - | 8 | 2000us | 50pC FSR | Raffy's (PDs: S12915-16R) | Different PDs array |
| 8 | 4.5 | 1 | 300 | - | 8 | 2000us | 200pC FSR | Raffy's (PDs: S12915-16R) | |
| 9 | 4.5 | 1 | 300 | - | 8 | 2000us | 350pC FSR | Raffy's (PDs: S12915-16R) | |
| 10 | 4.5 | 1 | 300 | - | 8 | 170us | 350pC FSR | Raffy's (PDs: S12915-16R) | |
| 11 | 4.5 | 1 | 300 | - | 8 | 170us | 200pC FSR | Raffy's (PDs: S12915-16R) | |
| 12 | 4.5 | 1 | 300 | - | 8 | 170us | 12.5pC FSR | Raffy's (PDs: S12915-16R) |