11.36 Water flow, pressure & temperature ( 19 deg C ) OK

      Power ON


      Detector configuration - installed yesterday pm

      Extant ( May 2022 campaign ) snout
      1x MSL type BB18(DS)-1000 24cm x 8cm 'triple' DSSSD
      1x ( downstream ) bPlast

      2x additional Al foil sheets over end cap to ensure light tight ( zero dark current ) for bPlast
      Dark current c 0.4uA measured for extant 2x Al foil sheets only


      FEE64 configuration - aida01 - aida08
      aida02 & aida04 n+n Ohmic strips, other FEE64s p+n junction strips
      NH re-named FEE64s using dhcpd.conf - *no* changes to AIDA PSU cabling to FEE64s 


      All system wide checks OK

      DSSSD bias -150V leakage current -5.140uA - attachment 1
      FEE64 temps OK - attachment 2


      ASIC settings 2021Apr29-13-16-00
      Manually change ASIC settings aida06 & aida08 from - to + input

      BNC PB-5 pulser to aida08
      settings?

      Slow comparator 0x64 all FEE64s
      ADC data item stats - attachment 3

      Increased rates and noise cf yesterday's test https://elog.ph.ed.ac.uk/AIDA/916
      See attachments 4-9
      Per FEE64 Rate spectra
      Per FEE64 1.8.L spectra
      Per FEE64 1.8.W spectra - 20us FSR

12.10 Disconnected power cables(?) from 3x bPlast cards around AIDA snout 
      1x card hanging to side of snout - aida04 side, 2x resting on top of AIDA snout ( inserted 2 sheets folded A4 paper between AIDA snout and PCBs )

      Per FEE64 1.8.W spectra - 20us FSR - attachments 10 & 11
      Per FEE64 Rate spectra - attachment 12
      Significant improvement observed


      Slow comparators 0xa p+n FEE64s, 0xf n+n FEE64s
      pwer FEE64 1.8.W spectra - 20us FSR - attachments 13-15
      ADC data item stats  - attachment 16
      per FEE64 Rate spectra - attachments 17 & 18


14.16 Removed bPlast cards from around snout - small improvment ADC stats
      Attachments 19-22


15.10 aida01 FEE64 adaptor PCB re-seated ( c. 1 pin row out of position )

      ASIC data item stats - attachment 23
      Significant improvement which approaches previous noise performance


      CC now assembling bPlast adaptor cards on a standoff Minitek frame
      HA/IK have confirmed that bPlast cables are screened on one side only - CC demonstrated that surfaces of both sides of the bPlast cabling are non-conductive


      Once assembled ( cards + power cables + input cables to bPlast detector ), observed increased noise similar to that observed this am


      Attempt to return to status quo ante did not reduce noise but observed problems with aida01 ( asics #3 & #4 did not load ) - attachment 24
      An unusual error message - power cycled and rebooted FEE64s

      Slow comparator 0x64
      ADC data item stats - attachment 27

     Slow comparators 0xa p+n FEE64s, 0xf n+n FEE64s
     ADC data item stats  - attachments 26
     per FEE64 Rate spectra - attachment 25


     This appears to have ( largely ) restored status quo ante. Large number of hot channels but other typically close to previously observed rates.