AIDA GELINA BRIKEN nToF CRIB ISOLDE CIRCE nTOFCapture DESPEC DTAS EDI_PSA 179Ta CARME StellarModelling DCF K40
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Message ID: 904     Entry time: Wed Oct 11 09:37:30 2023
Author: TD 
Subject: Wednesday 11 October 
10.00 Water flow & temp OK
      Power ON

      All system wide checks OK

      CAEN N1419ET ch 2 - all outputs non-floating ( internal LK fitted )
      Standard coaxial HV cable chained to aida12, aida03 & aida11
      aida04 LK1 ( local gnd ) fitted

      ground cable from aida04 adaptor PCB ground to aida12 to aida02

      aida03 LK3 ( PCB gnd ) fitted

      BNC PB-5 
      amplitude 10.0V
      attenuation x10
      decay time 1ms
      polarity -
      frequency 25Hz

      test + cable and test + chain removed
      test - direct from PB-5 to aida02 *only*

      DSSSD bias -120V -6.105uA - attachment 1

      FEE64 tempweratures OK - attachment 2

      slow comparator 0x64

      ADC data item stats - attachment 3
      Note 
       aida04 asic #1 u/s
        ASIC mezzanine to be replaced
       aida10 asic #4 v. high rates observed
        see https://elog.ph.ed.ac.uk/AIDA/901 attachment 45
        ASIC/cable/wafer issue ?

      rate ~ 1600Hz observed for aida02 - pulser
      All other rates 0Hz

      per FEE64 Rate spectra - attachment 4

      aida02 1.8.L pulser peak width 137 ch FWHM


      1.8.W spetcra 20us, 200us & 2ms FSR - attachments 5-10


      slow comparator 0x64 -> 0xf 

      ADC data item stats - attachment 11
      per FEE64 Rate spectra - attachments 12 & 13
       p+n rates entirely dominated by hot channels, otherwise rates ~0Hz
       n+n rates ~ 200-300Hz/channel

      slow comparator 0xf -> 0xa

      ADC data item stats - attachment 14
      per FEE64 Rate spectra - attachments 15-17
       p+n rates aida12, aida03 & aida11 entirely dominated by hot channels, otherwise rates ~0Hz
       p+n rates aida10, aida01 & aida09 ~500-1000Hz/channel
       n+n rates ~ 2000-3000Hz/channel

11.25 Extend HV chain from aida11 to aida09

      ADC data item stats - attachment 18
       significant decrease in aida09 rate

      1.8.W spectra 2ms FSR - attachments 19 & 20
       significant improvement in aida09 1.8.W noise

      aida02 1.8.L pulser peak width 165 ch FWHM ( slow comparator 0xa ), 127 ch FWHM ( 0xf )


12.00 Extend HV chain from aida09 to aida01 & aida10

      slow comparator 0xf

      ADC data item stats - attachment 21

      per FEE64 Rate spectra - attachment 22

      1.8.W spectra 2ms FSR - attachments 23-26
       significant improvement in aida01 & aida10 1.8.W noise

      aida02 1.8.L pulser peak width 127 ch FWHM ( 0xf )


12.35 slow comparator 0xf
      
      ADC data item stats - attachment 27
      per FEE64 Rate spectra - attachment 28




      slow comparator 0xa
      
      ADC data item stats - attachment 29
      per FEE64 Rate spectra - attachment 30



      slow comparator 0x9
      
      ADC data item stats - attachment 31
      per FEE64 Rate spectra - attachment 32 & 33



      slow comparator 0x8
      
      ADC data item stats - attachment 34
      per FEE64 Rate spectra - attachment 35



      slow comparator 0x7
      
      ADC data item stats - attachment 36
      per FEE64 Rate spectra - attachment 37



      slow comparator 0x6
      
      ADC data item stats - attachment 38
      per FEE64 Rate spectra - attachment 39



      slow comparator 0x5
      
      ADC data item stats - attachment 40
      per FEE64 Rate spectra - attachment 41



16.55 Background alpha 3*L & 3*W ( 20us FSR ) spectra - attachments 42 & 43
      Slow comparator 0xf
      Waveform threshold 7000 ( - polarity ), 9000 ( + polarity )

17.00 DSSSD bias -120V -7.125uA - attachment 44

      aida02 1.8.L ( n+n Ohmic side strip ) pulser peak width as function of DSSSD bias 

      Bias I_l    FWHM  Centroid
      (V)  (uA)   (ch)  (ch)
      -120 -7.125 124.8 43090
      -140 -7.230 124.5 43092
      -160 -7.370 120.2 43093
      -180 -7.570 120.0 43095
      -100 -7.020 143.8 43089
       -80 -6.820 continuum/no peak
      -150 -7.300 122.6 43093


      DSSSD bias -150V -7.280uA

      aida02 *.*.L spectra - attachments 45-48
      All channels have similar pulser peak widths to 1.8.L
 








      
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