ELOG DESPEC

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

DESPEC

Fields marked with * are required
Entry time:	Sat Mar 29 11:41:47 2025
Author*:
Subject*:
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

Attachment 1:
Drop attachments here...

ELOG V3.1.4-unknown