Beginning of the run 2024: temperature and 7 pttern tests
Summary:
a) Temperature: dark current probably does not generate that much heat. Reason for change from 18-28 not known.
b) 7Pattern test:
definetly dead:
E PP3TT31, W PP6TT1
unclear:
- only one pattern spectacularly bad: E PP1TT21(pedestal?), E PP4TT22(higher pedestal?), E PP9TT30(pedestal?), E PP10TT11
- or zero or super high: E PP4TT21(pedestal?), E PP8TT14(wide pedestal), E PP10TT10, EPP1TT22(higher pedestal?)
not ok but ok:
E PP3TT30, E PP9TT15(pedestal?), WPP9TT30
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1. We installed West and then East EPD
2. Attached the fibre cables
3. Tight lighting test done
4. We observe higher then expected temperature of the fee cards. Below more discussion about that.
During the lighting test the temperature of the "tiles" (it is T of fee card in reality, but shows on the GUI as a temp of the channel) about 24-27 C. What is higher than before. We checked the dark current and the results does not show differences with what we had last year. During the night we had a power dip in STAR, we run the 1 wire scan and (not sure if related with previously mentioned things) in the morning we had temperature about ~18C. What causes the changes? We measured temperature in time just after we turn off the EPD and then on - the variations are negligible (code to make these plots is attached, change txt->py)
Mike makes visit and turns off EPD on GUI at 10:39pm.
5. First 7 pattern test on April 3rd. We moved the threshold for the green color up for 50 adc. Results .
6. On April 4th we plugged in the hanging cards into EQ4 what solved the problem of the blue cluster in West on the right.
7. After some problems with triggers we could run on April 4th the 7 Pattern test again. Results.
(pedestals from the pattern test)
Bad guys:
East (0)
PP1TT21 (EQ4 B4 ch21) --- in pattern 7 shows waaay lower value than others (141, while the neighbouring TT20 - 257), in rest of the patterns does well
PP1TT22 (EQ4 B4 ch22) --- all zeros accept pattern 5, where it is super high
PP3TT30 (EQ4 B6 ch22) ---- bad only in one pattern3 and on the edge; Maria comment: it is ok!
PP3TT31 (EQ4 B6 ch23) ---- in pattern 1,3,5,6, shows 0; has low pedestal; in all shows 0; Maria comment: DEAD :(
PP4TT21 (EQ2 B6 ch13) ---- all patterns very high value; only pattern 2 =0; Maria comment: too hot!
PP4TT22 (EQ2 B6 ch14) ---- only bad in pattern1 much too high
PP8TT14 (EQ3 B6 ch14) ---- wide pedestals; all pattens very high adc, pattern 6 = 0; maria comment: wide pedestals, very hot!
PP9TT15 (EQ3 B6 ch21) ---- wide pedestals; on the edge; maria comment: OK!
PP9TT30 (EQ1 B6 ch30) ---- in one pattern 4 adc =0 instead of ~100; pedestal standard;
PP10TT10 (EQ3 B6 ch22) ---- pedestals high; pat1,3,4,5,=0; pat2,6,7=~250;
PP10TT11 (EQ3 B6 ch23) ---- pedestals high; only pat2 is wrong and shows 0, not close to what it should be.
West:
PP6TT1 - always 0; MS opinion: just dead :(
PP9TT30 (EQ1 b14 ch22) - on the edge in 2 Pattern; MS opinion: it is ok!
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