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

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Entry time:	Sat Mar 29 11:26:55 2025
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> 11.15 - S4 is currently closed no access > > If access possible (should be) plan is > > Re-attach ribbon cable braids > Re-attach DSSSD middle wafer rear g/r (LK3) > Re-attach DSSSD ground (LK2?) > > See difference in rates, expectation is braid should restore most p+n rates > > Once status quo ante achieved explore ASIC settings to identify preamp feedback and shaping time options to stabilise preamp output and optimise signal:noise. > > aida12 Peak width = 84.73 > aida02 Peak width = 526.68 > Attachment 1 - Stats > Attachment 2 - Per FEE Rates > Attachments 3,4 - Waveforms > Attachments 5,6 - Pulser Peaks > Attachment 7 - HV Bias. Leakage current recovered and does not seem to be ramping up > > 16.00 - Attach LK3 jumpers to aidas 1, 3, 5, 7 (DSSD ground and middle rear g/r) > > Attachment 8 - Stats > Attachment 9 - Per FEE Rates > Attachment 10, 11 - Waveforms > Attachment 12, 13 - Pulser Peaks > > aida12 Peak width = 78.51 > aida02 Peak width = 480.90 > > No major change, FEES 1-8 are all noisy and FEES 9-16 are quiet > aida01, aida05 waveforms very noticably bad (100 kHz), aida03, aida07 waveforms seem OK > > > 16.45 - Attach LK2, LK4 jumpers to all FEEs (field plane grounding) > No significant changes > > Attachment 14 - Stats > Attachment 15 - Per FEE Rates > Attachment 16, 17 - Pulser Peaks > Attachment 18, 19 - Waveforms > > aida12 Peak width = 71.28 > aida02 Peak width = 458.18 > > Remove LK3 jumpers > > aida12 Peak width = 71.43 > aida02 Peak width = 496.05 > > > Attachment 20 - Stats > Attachment 21 - Per FEE Rates > Attachment 22, 23 - Pulser Peaks > Attachment 24, 25 - Waveforms > > Re-add jumpers - attachments 26-28 > > aida12 Peak width = 87.42 > aida02 Peak width = 572.24 > > 17.45 Directly bias from the p+n FEEs using SHV->BNC->Lemo - attachments 29-33 > > aida12 Peak width = 87.87 > aida02 Peak width = 504.41 > > The correlation between high 'ADC data item' rate and the noise observed on the corresponding 1.8.W spectrum is not clear except for aida01 & aida05 - see also attachments 34-35 > > ADC data item stats - attachment 36 > > DSSSD bias & leakage current OK - attachment 37 > > FEE64 temperatures OK - attachment 38 > > all system wide checks OK except aida11 clock fail status 6 Encoding*: HTML ELCode plain Suppress Email notification

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