ELOG AIDA

AIDA GELINA BRIKEN nToF CRIB ISOLDE CIRCE nTOFCapture DESPEC DTAS EDI_PSA 179Ta CARME StellarModelling DCF K40

AIDA

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Entry time:	Sat Mar 29 12:36:51 2025
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10.20 DSSSD bias +100V leakage current +6.565uA - attachment 1 All system wide checks OK - attachments 2-7 why is SYNC rollover target 0xe? FEE64 temps OK - attachment 8 per FEE64 1.8.W spectra 20us FSR - attachments 9-10 slow comparator 0x64 per FEE64 rate spectra - attachment 11 ADC data item stats - attachment 12 slow compararator 0x14 ADC data item stats - attachment 13 11.10 Test + & test - cables disconnected at the outputs of the BNC PB-5 and EG&G Ortec 534 slow comparator 0xf p+n rates dominated by 'hot' channels except aida03 & aida09 per FEE64 rate spectra - attachment 14 ADC data item stats - attachment 15 slow comparator 0xa p+n rates high ( 100-200k ) per FEE64 rate spectra - attachment 16 ADC data item stats - attachment 17 slow comparator 0x14 p+n rates entirely due to 'hot' channels per FEE64 rate spectra - attachment 18 per FEE64 1.8.W spectra 20us FSR - attachments 19-20 ADC data item stats - attachment 21 11.27 Remove ground cable from Al base plate to aida02 FEE64 adaptor PCB slow comparator 0xf p+n rates entirely due to 'hot' channels per FEE64 1.8.W spectra 20us FSR - attachments 22-23 per FEE64 rate spectra - attachment 25 ADC data item stats - attachment 24 slow comparator 0xa p+n rates high ( 30-130k ) but lower than previously per FEE64 rate spectra - attachment 26 ADC data item stats - attachment 27 11.48 DSSSD bias +100V leakage current +7.845uA Remove LK3 ( local HV ground middle Si wafer ) slow comparator 0xa p+n rates high ( 55-135k ) but increase in rates appears to be due to 'hot' channels per FEE64 1.8.W spectra 20us FSR - attachments 28-30 per FEE64 rate spectra - attachment 31 ADC data item stats - attachment 32 CAEN N1419ET ch #2 output connected to Tek TDS 210 DSO - powered from relay #6 ch 1 - ac - HV braid ch 2 - ac - HV core ch # 2 OFF - attachment 33 ch # 2 + 50V 0.000uA - attachments 34-35 with additional ThorLabs filter ch # 2 + 50V 0.000uA - attachment 39 ch 2 - dc, hi Z test - attachments 36-37 test + attachment 38 12.45 Install ThorLabs filter HV core ( no filter for HV braid ) slow comparator 0xa p+n rates high ( 40-130k ) but p+n rates dominated by 'hot' channels except aida03, aida11, aida12 where rates are generally higher per strip per FEE64 rate spectra - attachment 40 per FEE64 1.8.W spectra 20us FSR - attachments 41-42 ADC data item stats - attachment 43 14.55 Install ThorLabs filter HV braid ( filters for both HV core & braid ) slow comparator 0xa p+n rates high ( 50-150k ) two filters probably somewhat worse than one filter per FEE64 rate spectra - attachment 46 per FEE64 1.8.W spectra 20us FSR - attachments 44-45 ADC data item stats - attachment 47 Overall, effect of ThorLabs filters appears to belimited. Perhaps not unexpected as FEE64 adaptor PCBs also have a HV RC filter. Encoding: HTML ELCode plain Suppress Email notification

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