AIDA
GELINA
BRIKEN
nToF
CRIB
ISOLDE
CIRCE
nTOFCapture
DESPEC
DTAS
EDI_PSA
179Ta
CARME
StellarModelling
DCF
K40
AIDA
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Sat Mar 29 12:31:55 2025
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> > 09.50 DSSSD bias +100V leakage current +9.255uA - attachment 2 > > FEE64 temperatures OK - attachment 1 > > All system wide checks OK > > per FEE64 1.8.W spectra 20 & 200us FSR - attachments 3-6 > > per p+n FEE64 1.8.L spectra - attachments 7-8 > aida01 pulser peak width 87 ch FWHM > > adc data item stats - slow comparator 0x64, 0x14, 0xa - attachments 15, 14, 11 > per FEE64 rate spectra - attachments 9-10, 12-13 > > > from https://elog.ph.ed.ac.uk/AIDA/872 > > 13x FEE64s installed - see attachment 2 ( courtesy NH ) > > FEE64 # Cable set # > 1 1 > 2 2 > 3 3 > 4 4 > 5 > 6 6 > 7 > 8 8 > 9 9 > 10 5 > 11 11 > 12 7 > 15 > > Change AIDA PSU cabling from > > #1 1-3 2-4 5-6 7-8 > #2 9-10 11-12 13-14 15-16 > > to > > #1 1-3 2-4 5-7 9-11 > #2 6-8 10-12 13-14 15-16 > > DSSSD bias +100V leakage current +11.765uA > > per FEE64 1.8.W spectra 200us FSR - attachments 16-17 > > per p+n FEE64 1.8.L spectra - attachments 18-19 > aida01 pulser peak width 158 ch FWHM ( note double peaking ) > > adc data item stats - slow comparator 0x64, 0x14 - attachments 23, 21 > per FEE64 rate spectra - attachments 20, 22 > > > DSSSD bias +30V leakage current +35.8uA > > > > > > 13.35 DSSSD bias +100V leakage current +11.785uA > > aida04 34-way cable #1 connected to ASIC #1 & 2 disconnected from adaptor PCB > > per FEE64 1.8.W spectra 2000us FSR - attachments 26-27 > > adc data item stats - slow comparator 0x64, 0x14 - attachments 29-30 > per FEE64 rate spectra - attachment 28 > > > 16.20 Install LK2 & LK4 aida12, aida03, aida11 ( front & rear field plate ground ) > > DSSSD over current ( 200uA @ c. 30V ) - high resistance short? > > LK2 & LK4 installed aida12 *only* - OvC > LK2 & LK4 installed aida11 *only* - OvC > LK2 & LK4 installed aida3 *only* - OvC > > LK2 installed aida3 *only* - OvC ( LK2 = rear field plate ) > > All front & rear field plate connections appear to provide a high resistance short to ground for detector bias. This may be related to issues observed biasing DSSSD via aida01 & aida09 - https://elog.ph.ed.ac.uk/AIDA/874 > But why does it affect aida12 too?
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