AIDA
GELINA
BRIKEN
nToF
CRIB
ISOLDE
CIRCE
nTOFCapture
DESPEC
DTAS
EDI_PSA
179Ta
CARME
StellarModelling
DCF
K40
AIDA
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Entry time:
Sun Mar 30 09:19:33 2025
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> > 09.40 Al snout electrically connected ( < 1 Ohm ) to Al gasket and Al base plate > Al snout electrically isolated ( > 20 MOhm ) from aida02 FEE64 adaptor PCB and AIDA support frame > > FEE64 temperatures OK - attachment 1 > DSSSD bias +100V leakage current +7.565uA - attachment 2 > > All system wide checks OK > > Slow comparator 0x64 > per FEE64 rate spectra - attachment 3 > per p+n FEE64 1.8.L spectra - attachments 4-5 > aida01 pulser peak width 134 ch FWHM > per FEE64 1.8.W spectra 200us FSR - attachments 6-7 > ADC data item stats - attachment 8 > > Slow comparator 0x14 > ADC data item stats - attachment 9 > per FEE64 rate spectra - attachment 10 > > > > > Ground Al base plate to aida02 FEE64 adaptor PCB - appears to be marginally worse than without ground > > per p+n FEE64 1.8.L spectra - attachments 11-12 > aida01 pulser peak width 120 ch FWHM > per FEE64 1.8.W spectra 200us FSR - attachments 13-14 > per FEE64 rate spectra - attachment 15 > ADC data item stats - attachment 16 > > > 11.48 DSSSD bias +100V leakage current +11.055uA > > Ground Al base plate to AIDA support frame - appears to be significantly worse than without ground > > per FEE64 1.8.W spectra 200us FSR - attachments 17-18 > per p+n FEE64 1.8.L spectra - attachments 19-20 > aida01 pulser peak width 150 ch FWHM > per FEE64 rate spectra - attachment 21 > ADC data item stats - attachment 22 > > > 11.48 DSSSD bias +130V leakage current +35.05uA > > Ground Al base plate to aida02 FEE64 adaptor PCB - additional bias makes no significant difference > > per FEE64 rate spectra - attachment 23 > per p+n FEE64 1.8.L spectra - attachments 24-25 > aida01 pulser peak width 118 ch FWHM > per FEE64 1.8.W spectra 200us FSR - attachments 26-27 > ADC data item stats - attachment 28 > > > > 14.03 DSSSD bias +100V leakage current +10.7uA > Ground Al base plate to aida02 FEE64 adaptor PCB - re-check > per FEE64 1.8.W spectra 200us FSR - attachments 28-29 > ADC data item stats - attachment 30 > > > > > 15.10 Add DSSSD HV cable from aida04 to aida02 - significantly worse > Ground Al base plate to aida02 FEE64 adaptor PCB - re-check > per FEE64 1.8.W spectra 200us FSR - attachments 31-32 > ADC data item stats - attachment 33 > > > > > 15.37 Switch from - to + polarity detector HV > N1419ET from ch #3 to ch #2, all outputs non-floating > LK1 ( local HV ground )removed from aida12, aida03, aida11 - installed aida04 > LK3 ( DSSSD PCB ground ) installed aida03 ( no change ) > HV #1 core aida12, aida03, aida11 - braid aida04 > test + chain aida9, aida01, aida10, aida12, aida03, aida11 - connected to BNC PB-5 pulser > test - chain aida04, aida02 - not connected to pulser > > AIDA PSU cabling per https://elog.ph.ed.ac.uk/AIDA/879 > HV cable aida04 to aida02 - removed > Ground Al base plate to aida02 FEE64 adaptor PCB - removed > > FEE64 temperatures OK - attachment 35 > DSSSD bias -100V leakage current -7.155uA - attachment 36 > > Slow comparator 0x14 > per FEE64 rate spectra - attachment 37 > per p+n FEE64 1.8.L spectra - attachments 38-39 > aida01 pulser peak width 123 ch FWHM but note double peaking > per FEE64 1.8.W spectra 200us FSR - attachments 40-41 > ADC data item stats - attachment 42 > Slow comparator 0x64 > ADC data item stats - attachment 43 > > Very similar performance to + polarity DSSSD HV tests > > > 16.05 Add LK1 to aida02 > DSSSD bias -100V leakage current -7.770uA > > Slow comparator 0x14 > per FEE64 1.8.W spectra 200us FSR - attachments 44-46 > ADC data item stats - attachment 47 > per FEE64 rate spectra - attachment 48 > > Improved noise for n+n FEE64s esp. aida04
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