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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