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:

Sun Nov 27 16:29:51 2016

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01.28 Beam stopped temporarily.
      ~750MB into R26_38.
      Bias and leakage currents ok, as are FEE temps (attachments 1-3).
      Removed 1mm fixed Al degrader from in front of PE wall.
         > Now have 3mm PB downstream of 2nd MUSIC + 1.3mm W and 2mm Al.

01.35 Beam returned.
      ~1/2 way through R26_39.

06.27 LN2 fill.
      Run R26 stopped successfully @ R26_97.

07.41 After a couple of failed attempts, R27 successfully started.

07.44 Resync pulse sent from BRIKEN as nothing is seen on sync monitor.

07.58 Bias and leakage currents ok (attachments 4+5).

09.00 Beam stopped for stripper foil change.
      1.4GB into R27_15.
      Will continue with R27.

9.13  Changed degraders and shields in F11
      Pb bricks between MUSIC 1 and MUSIC 2 were not changed, but we confirmed their positions and size of the
window.
         Width of window is 7.5 cm, height of window is larger than the MUSIC windows, depth of Pb to beam is 10 cm
      New Pb bricks placed downstream of the variable degrader
         Width of window is ~12 cm, height of window is larger than the MUSIC windows, depth of Pb to beam is 20 cm
      3 mm Pb degrader was moved from the front of the PE wall to the front of the upstream Pb shield 
         (between MUSIC 1 and 2 as described above)

9.15 BigRIPS run 1049

AIDA runs R27_15 (end portion) and all of _16, and the start of R27_17 include beam-off time.

The start of R27_18 should coincide nearly with beam on.

10.00 System-wide checks OK *except* clock status errors from amongst nnaida5, 7, 8, 15 & 16 - bit 2 always set
      and ADC calibration fail for nnaida13

10.50 BigRIPS run 1050 begins

11.02 We checked the timestamping, and it looks like BRIKEN and AIDA are not synchronized.  So we will restart runs.

11.08 R28_00 at AIDA started

11.12 All syncs look good now.

11.16 BigRIPS data file 1051

12.08 Visual scalers - see attachment 6

12.12 SyncCheck OK - see attachment 7

12.22 BigRIPS data file 1052

14.19 Sync of AIDA shows two peaks with both BRIKEN and BigRIPS, so we stop the run.
      BigRIPS should be starting a new run soon, so we will wait for them to start the new run

14.31 New AIDA run R29_0; started directly after BigRIPS 1054 (14.29 start)

16.00 Offline analysis of R27_1 and R28_14 was done with MIDAS.  See their respective eLog entries
      The main difference between these runs is R27 has the 3 mm Pb closer to AIDA than R28
      The number of implants to AIDA seems about a factor 2 higher with the 3 mm Pb closer to AIDA
      During the next chance to enter F11, we should shift the 3 mm Pb closer to AIDA again, all other things being
equal (BRIKEN impact?!)

18.22 Stop the run (R29_47) in preparation for LN2 fill.

19.30 Ambient temperature +25.7 deg C, dp.p. +0.2 deg C, RH 18.4%
      DSSSD bias & leakage currents OK - see attachments 8 & 9

19.35 Beam is stopped to exchange strippers.  Main exp. team also enters the radiation area for ~20 min
      Remove the 3mm Pb degrader (it was on the upstream side of the Pb shield between MUSIC 1 and MUSIC 2)
      Add 8 mm Al to the front of the PE wall.  This should be an equivalent dE for 40Mg we calculated.

19.59 DAQ starts (RIBF03R1/R30)

20.05 SyncCheck OK

20.06 Beam back (R30_1)
      BigRIPS data file 1060
      Degrader ( 8mm Al ) fixed + ( 0.3mm W/1mm Al + 1.0mm W/1mm Al ) variable

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