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

• DDC232 settings: 170us integration time and measured 10000 samples per run.
• Signal Generator settings: 0 ps delay, 500 kHz, 300 ns width, 5 ns leading edge and trailing edge, 6V high, 0V low.
• Fibres used: 25 and 29 (25 used for single injection tests).
• Sheets used: 84, 82, 81, 80, 79, 78, 77, 76, 75
• Materials tested: none, white paper (0.01 mm thick), black card (0.02 mm thick), mylar foil (0.006 mm thick). Materials cut into 10 cm x 10 cm layers and placed in-between sheets.

Run	Description	Graph
1	No material dark noise test, 12.5pC
2	No material cross-talk test, 12.5pC
3	No material light level test sheet 1, 350pC
4	No material light level test sheet 2
5	No material light level test sheet 3
6	No material light level test sheet 4
7	No material light level test sheet 5
8	No material light level test sheet 6
9	No material light level test sheet 7
10	No material light level test sheet 8
11	No material light level test sheet 9
12	No material 90° dark noise test
13	No material 90° cross-talk test
14	No material 90° light level test sheet 1
15	No material 90° light level test sheet 1
16	No material 90° light level test sheet 1
17	No material 90° light level test sheet 1
18	No material 90° light level test sheet 1
19	No material 90° light level test sheet 1
20	No material 90° light level test sheet 1
21	No material 90° light level test sheet 1
22	No material 90° light level test sheet 1
23	No material 90° light level test sheet 1
24	No material 90° light level test sheet 1
25	No material 90° light level test sheet 1
26	No material 90° light level test sheet 1
27	No material 90° light level test sheet 1
28	No material 90° light level test sheet 1
29	No material 90° light level test sheet 1
30	No material 90° light level test sheet 1
31	No material 90° light level test sheet 1
32	No material 90° light level test sheet 1
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96	No material 90° light level test sheet 1