AIDA
GELINA
BRIKEN
nToF
CRIB
ISOLDE
CIRCE
nTOFCapture
DESPEC
DTAS
EDI_PSA
179Ta
CARME
StellarModelling
DCF
K40
DESPEC
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Entry time:
Sat Mar 29 11:37:53 2025
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Summary of the day: Small improvements were made throughout the day but by far the biggest change to the rate in the FEEs came from disabling the waveforms This was done by setting ADC con Initial jumper configuration: FEE LK 1 2 4 2 1 2 4 3 2 3 4 4 2 4 5 2 4 6 1 2 4 7 2 3 4 8 1 2 4 13:22 LK2, 3 and 4 on all p+n - attachment 1 14:20 AC mains relay connected to AC voltage stabilisers + on separate mains socket from DESPEC - attachment 2 Same configuration but waveforms disabled (p+n improvment) - attachment 3 Layout 1 - attachment 4 14:32 all FEE power cables moved to PSU 2 (Lower one in rack, upper one was slow to start for 1 FEE pair, likely the 5V slow to start) Previously all FEEs on their own pair within a psu New order 1,3 2,4 5,7 6,8 Waveforms on - all bad - attachment 5 Waveforms off - all p+n better - attachment 6 14:54 interlock removed from AC mains relay Also noticed adaptor board on 2 not in fully -> Now in p+n generally better - attachment 7 Without waveforms - p+n better again - attachment 8 16:04 Platform moved into position Interlock power cable removed from extension lead w/ waveform - p+n slightly worse w/o waveform - p+n same as beffore 16:14 LK3 removed from 1 and 5 w/ waveform -> p+n slightly worse - attachment 9 w/o waveform -> p+n best yet - attachment 10 16:33 LK1 wasn't on all n+n was only on 2, 6 and 8 Removed from 6 -> only one LK1 per DSSD w/ waveforms - all bad - attachment 11 w/o waveforms - no change - attachment 12 16:59 LK1 removed from 2->4 This is the FEE with the BIAS braid w/ waveform p+n better - attachment 13 w/0 waveform p+n better, n+n worse? - attachment 14 17:21 Bias filters added to n+n w/ waveform - no change - attachment 15 w/o wwaveofrm - P=n worse - attachment 16 Stats 0x21 - attachment 17 Stats 0x14 - attachment 18 Stats 0x12 - attachment 19 17:42 Bias filter removed and bias floated (LK1 removed) w/ waveform all worse - attachment 20 w/o waveform -> p+n worse, n+n similar 18:29 LK1 back on 4+8 w/ waveform -> poor w/0 waveform - recovered previous - attachment 20 18:32 LK 2 and 4 removed from 2 +6 Also noticed ground lemo on aida02 not fully inserted which has been corrected w/ waveform poor - attachment 21 Threshold 0xF - attachment 22 w/o waveform - attachment 23
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