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:

Tue Nov 29 15:12:33 2016

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00.11 Beam stopped for target @F8 change.
      R35 stopped at R35_62.
      BRIKEN file 161129_1951 155->159
      BigRIPS files 1084-1088.

Bias and leakage currents ok (attachments 1+2).

00:38 Added 0.2 mm Al fixed degrader. The new target at F8 is 0.9 g/cm2 C, which (according to LISE calculation)
      results in 2.7 MeV/u less energy loss than the previous 0.9 g/cm2 CH2 target.

00:42 Beam returned. R36 started. BigRIPS file 1089.
      Initially out of sync with BRIKEN so reset correlation timestamp @ 01:45 (~1/2 way through R36_0).

02:26 Beam rate at F11 about doubled. Now ~80cps @ F11.
      Previously changing beam spot position, but now 41Al now centred.

02:39 Beam stopped start @ of R36_11.

03.33 Beam returned to F11, centred on 40Mg in ZDS.
      Just after start of R36_22.
      BigRIPS file 1094.

04.35 Beam stopped. ~1/2 way through R36_34.
      Continue running with R36.

06.13 R36 stopped.
      The control module of a power supply of one of the STQs has broken and the accelerator team must contact the
      manufacturer to work out a solution.
      This will take some time (hours or maybe even into tomorrow).

09.36 STQ PSU fixed - beam returns
      BigRIPS data file 1096

10.00 AIDA DAQ soft reset to recover from LN2 fill cycle transient

10.03 DAQ starts (RIBF03R1/R38)
     
      ASIC settings 2016Nov29-21.38.02

Degrader (8mm Al) fixed + ( 0.3mm W/1mm Al + 1mm W/1m Al) variable

10.38 BigRIPS data file 1097

10.50 Unable to sync DAQs - appears BRIKEN timestamp is not being reset, AIDA-RIBFDAQ appear to be sync'd

11.16 Looks like BRIKEN gets the sync again.  It's some kind of integer overflow issue?!  Unclear.
      BRIKEN starts the new run.  It is the same time as AIDA R38_14 (about 400 MB into file)

11.43 BigRIPS data file 1098

12.47 BigRIPS data file 1099

13.02 DSSSD bias & leakage currents OK - see attachments 3 & 4
      FEE64 temperatures OK - see attachment 5
      Visual scalers - see attachment 6
      Good events and Merge statistics - see attachments 7-12
      All FEE64s << 100 k data items/s

Offline analysis of R38_34 shows most events are in DSSSDs #5 & #6

13.20 DAQ stopped OK (RIBF0R1/R38_35)

Change degrader to (8mm Al) fixed + ( 0.5mm W/1mm Al + 1mm W/1m Al) variable, i.e. additional 0.2mm W

13.21 DAQ starts (RIBF0R1/R39)
      BRIKEN DAQ issues three re-syncs
      SyncCheck OK

13.32 AIDA data file R39_2
      BRIKEN data file 175
      ASIC settings 2016Nov29-21.38.02
      Degrader (8mm Al) fixed + ( 0.5mm W/1mm Al + 1mm W/1m Al) variable
      B-rho changed from 6.384Tm to 6.673Tm overnight => 9.3% energy change
      A=40 ions at F11 change from 145MeV/u to 158MeV/u

14.22 Beam was off to change stripper foil.  Now it is back at F11, around 10 cps at the scint (BigRIPS scaler) or
60 cps at our normal F11 plastic 
     Very nearly the time of R39_12 beginning.
     BigRIPS run 1101

15.25 Offline analysis indicates we need to increase degrader thickness further
      Will add 0.5mm W/1mm Al to change degrader to (8mm Al) fixed + ( 0.3mm W/1mm Al + 0.5mm /1mm Al + 1mm W/1mm Al
) variable

15.30 DAQ continues (RIBF03R1/R39_25)
      BRIKEN data file 178

16.06 BigRIPS data file 1103

16.23 We observed that the degrader was not actually inserted previously as we thought.
     Now it is inserted, so variable degraders 1, 2 and 3: 0.5 mm W (+1 mm Al), 0.3 mm W (+1 mm Al) and 1.0 mm W (+1
mm Al)
     AIDA run is R39_36

17.04 BigRIPS data file 1104

17.53 System-wide checks OK *except* variable # of nnaida5, 7, 8 , 15 & 16 fail clock status - bit 2 always set

18.06 BigRIPS data file 1105

18.21 DAQ stops OK (RIBF03R1/R39_60) in advance of Clover LN2 refill cycle

19.08 BigRIPS data file 1106

19.29 DAQ starts (RIBF03R1/R41_0)
      Steering to F11 changed by PD - attempt to centre implants in DSSSDs

19.30 BigRIPS data file 1107

19.42 AIDA data file R41_2
      BRIKEN data file 183
      ASIC settings 2016Nov29-21.38.02
      Degrader (8mm Al) fixed + ( 0.3mm W/1mm Al + 0.5mm W/1mm Al + 1mm W/1m Al) variable

20.00 Visual scalers - see attachment 13

20.27 BigRIPS data file 1108

21.26 Beam lost

21.43 Beam back
      BigRIPS data file 1109
      AIDA data file R41_26
      BRIKEN data file 183

22.47 BigRIPS data file 1110.

23.47 BigRIPS data file 1111.

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