AIDA
GELINA
BRIKEN
nToF
CRIB
ISOLDE
CIRCE
nTOFCapture
DESPEC
DTAS
EDI_PSA
179Ta
CARME
StellarModelling
DCF
K40
AIDA
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Entry time:
Thu Oct 9 23:28:44 2025
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> > 11.36 Water flow, pressure & temperature ( 19 deg C ) OK > > Power ON > > > Detector configuration - installed yesterday pm > > Extant ( May 2022 campaign ) snout > 1x MSL type BB18(DS)-1000 24cm x 8cm 'triple' DSSSD > 1x ( downstream ) bPlast > > 2x additional Al foil sheets over end cap to ensure light tight ( zero dark current ) for bPlast > Dark current c 0.4uA measured for extant 2x Al foil sheets only > > > FEE64 configuration - aida01 - aida08 > aida02 & aida04 n+n Ohmic strips, other FEE64s p+n junction strips > NH re-named FEE64s using dhcpd.conf - *no* changes to AIDA PSU cabling to FEE64s > > > All system wide checks OK > > DSSSD bias -150V leakage current -5.140uA - attachment 1 > FEE64 temps OK - attachment 2 > > > ASIC settings 2021Apr29-13-16-00 > Manually change ASIC settings aida06 & aida08 from - to + input > > BNC PB-5 pulser to aida08 > settings? > > Slow comparator 0x64 all FEE64s > ADC data item stats - attachment 3 > > Increased rates and noise cf yesterday's test https://elog.ph.ed.ac.uk/AIDA/916 > See attachments 4-9 > Per FEE64 Rate spectra > Per FEE64 1.8.L spectra > Per FEE64 1.8.W spectra - 20us FSR > > 12.10 Disconnected power cables(?) from 3x bPlast cards around AIDA snout > 1x card hanging to side of snout - aida04 side, 2x resting on top of AIDA snout ( inserted 2 sheets folded A4 paper between AIDA snout and PCBs ) > > Per FEE64 1.8.W spectra - 20us FSR - attachments 10 & 11 > Per FEE64 Rate spectra - attachment 12 > Significant improvement observed > > > Slow comparators 0xa p+n FEE64s, 0xf n+n FEE64s > pwer FEE64 1.8.W spectra - 20us FSR - attachments 13-15 > ADC data item stats - attachment 16 > per FEE64 Rate spectra - attachments 17 & 18 > > > 14.16 Removed bPlast cards from around snout - small improvment ADC stats > Attachments 19-22 > > > 15.10 aida01 FEE64 adaptor PCB re-seated ( c. 1 pin row out of position ) > > ASIC data item stats - attachment 23 > Significant improvement which approaches previous noise performance > > > CC now assembling bPlast adaptor cards on a standoff Minitek frame > HA/IK have confirmed that bPlast cables are screened on one side only - CC demonstrated that surfaces of both sides of the bPlast cabling are non-conductive > > > Once assembled ( cards + power cables + input cables to bPlast detector ), observed increased noise similar to that observed this am > > > Attempt to return to status quo ante did not reduce noise but observed problems with aida01 ( asics #3 & #4 did not load ) - attachment 24 > An unusual error message - power cycled and rebooted FEE64s > > Slow comparator 0x64 > ADC data item stats - attachment 27 > > Slow comparators 0xa p+n FEE64s, 0xf n+n FEE64s > ADC data item stats - attachments 26 > per FEE64 Rate spectra - attachment 25 > > > This appears to have ( largely ) restored status quo ante. Large number of hot channels but other typically close to previously observed rates. > > > > > > > > >
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