AIDA
GELINA
BRIKEN
nToF
CRIB
ISOLDE
CIRCE
nTOFCapture
DESPEC
DTAS
EDI_PSA
179Ta
CARME
StellarModelling
DCF
K40
AIDA
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Entry time:
Wed Nov 15 10:37:00 2023
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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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