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:

Mon May 4 01:27:56 2015

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09.18 SN changed degrader to 5.7mm Al (4mm + all variable degraders + additional 1mm)

09.24 R53 continues

DSSSD#1 I_L to 8.16uA
      FEE64 temps OK
      Julabo FL11006 recirculating chiller OK - op temp +20 deg C

Example HEC ADC spectra DSSSD #1-3 (attachments 1-12)

09.59 R53 ends 
      Beam off - problem with refrigeration plant for BigRIPS quads

10.39 FEE64 temperatures (attachment 13)

10.51 Check ALL ASIC Control parameters

11.15 Stat and Hit spectra for all AIDA FEE64 modules (attachments 14-15)
      Illustrates common noisy channels for each FEE64 channels 1 & 55 of 0-63

11.28 R54 
      Short run without beam, BNC PB-4 pulser frequency ~1Hz

12.55 R54 ends OK

14.00 Plot of leakage currents up to now included.
      Gradual increase in all detectors over course of experiment.
      Bias voltage on detector 1 (ch 1) increased to +150V at 0900 on 03/05, causing 
      an increase in I_L over preceding value.

16.00 Beam expected 21.00

18.30 No beam.
      HV ch 2 tripped (det 3)
      Reset HV and observed expected leakage current

19.00 HV ch 1 also tripped.
      Increased HV to +150V. Leakage current @ 8.02uA

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