Proton Calorimetry/Experimental Runs/2022/MayLED
Optical isolation tests using LED fibre in D27.
Aim: Investigate optimal material to use to optically isolate unpainted sheets and whether single layers of material provide sufficient isolation.
Notes
| Run | Description | Graph | ||||
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| 1 | D27, CMOS on, 350pC |
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| 2 | D27, CMOS on, 12.5pC |
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| 3 | D27, CMOS off, 350pC |
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4 | D27, CMOS off, 12.5pC |
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| 5 | D109, CMOS on, 350pC |
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| 6 | D109, CMOS on, 12.5pC |
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| 7 | D109, CMOS off, 350pC |
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| 8 | D109, CMOS off, 12.5pC |
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| 9 | D109, CMOS on, 12.5pC. Detector housing grounded using ground pin of FPGA. Grounded using optical breadboard inside detector. |
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| 10 | D109, CMOS on, 12.5pC. Previous grounding seemed ineffective. Now grounded by attaching clip to metal on outside face of detector enclosure. |
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| 11 | D109, CMOS off, 12.5pC, grounded. |
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| 12 | D27, CMOS off, 12.5pC, grounded. |
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| 13 | D27, CMOS off, 12.5pC |
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| 14 | D27, CMOS off, 12.5pC, grounded, LED. LED pulse of 1MHz, 6V height and 500ns width. Injected into single scintillator sheet coupled to photodiode 16. |
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