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 12:36:58 2025
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15.16 DSSSD bias +100V leakage current +8.415uA ThorLabs filters removed Test + & test - signals disconnected at outputs of BNC PB-5 and EG&G Ortec 534 aida02 & aida04 LK1 installed, aida01 LK3 not installed aida03 LK3 installed test + & test- daisy chains installed HV daisy chain - core - aida12, aida03, aida11 HV daisy chain - braid - aida04 slow comparator 0xa p+n FEE64 rates high ( 50-125k ) per FEE64 rates - attachment 1 per FEE64 1.8.W spectra 200us FSR - attachments 2-3 adc data item stats - attachment 4 slow comparator 0xc p+n FEE64 rates OK ( 15-40k ) dominated by 'hot' channels, low per channel rates in aida11, aida03, aida12 per FEE64 rates - attachment 5-6 adc data item stats - attachment 7 slow comparator 0xf p+n FEE64 rates low ( 7-17k ) entirely dominated by 'hot' channels per FEE64 rates - attachment 8 adc data item stats - attachment 9 slow comparator 0x14 per FEE64 rates - attachment 10-11 adc data item stats - attachment 12 slow comparator 0x19 per FEE64 rates - attachment 13 adc data item stats - attachment 14 slow comparator 0x1e per FEE64 rates - attachment 15 adc data item stats - attachment 16 slow comparator 0x23 per FEE64 rates - attachment 17 adc data item stats - attachment 18 slow comparator 0x28 per FEE64 rates - attachment 19-20 adc data item stats - aattachment 21 Ignoring 'hot' channels, reduce rates to < 50Hz/channel for p+n slow comparator threshold 120-150keV and n+n slow comparator threshold 350-400keV If we assume that this estimates the 5x sigma threshold => p+n sigma c. 27keV rms, 64keV FWHM and n+n sigma c. 75keV rms, 176keV FWHM Given FEE64-DSSSD cable lengths, optimal p+n performance is c. 40-50keV FWHM so current tests begin to approach this - little extrinsic noise observed for preamp signals We continue to observe significant ( though very much improved ) extrinsic noise for n+n strips so current noise performance could be improved by x2-3. 18.42 slow comparator 0x64 stats & histograms zero'd DSSSD bias +100V leakage current +9.040uA Encoding: HTML ELCode plain Suppress Email notification

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