Fixed, e768s, Tue Jul 23 11:02:54 2019, Kseniia, Gilbert, BEAM, General, , Beam profile 
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Fixed, e768s, Tue Jul 23 12:00:25 2019, Christian, BEAM, General, LiF, Profiler and beam current scaling since 11;10
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| See also AGATA elog and run-log entry |
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Fixed, e768s, Tue Jul 23 13:11:36 2019, OttoRun, RUN, General, LiF, Run127
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Run : 127
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Start at 2019-07-23 13:09:00.419349
Beam intensity: 1.5e7 pps
OR VAMOS ~ 1100 Hz
after check of beam intensity on target (factor of 2 in transmission with target)
Target: 1.25 mg/cm2 (nb 1) 7LiF
Triggers:
MUGAST (backward, MM, 90 deg)
VAMOS %100
BaF2 %100
Rates:
FAG: 87
MUGAST: 70
OR AGATA: 1100
OR VAMOS: 940
MG3 pedestal suppression between 0 and 6800
Shift of beam, retuning from PCP
Stop at 2019-07-23 13:17:22.129736
Stop comment: End of short run 127 |
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Fixed, e768s, Tue Jul 23 13:20:20 2019, mugast, RUN, General, N/A, Beam stop for canicule
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At 13.16 the beam was stopped due to the high temperature.
Bertrand is switching off the magnets of VAMOS. |
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Fixed, e768s, Tue Jul 23 14:33:03 2019, Marlène, Yorick, Faïrouz & Nicolas, BEAM, General, , Cheking beam transmission from G1 profiler to VAMOS
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Goal:
Estimate beam transmission from profiler to VAMOS (FP)
We question whether the factor of two found yesterday (VAMOS/Profiler ~ 0.5) could be due:
1. to an incorrect measurement of the beam intensity with the profiler
2. a charge state equilibration in the target (LISE++ calculation indicates 8+/7+ = 85%/15%)
Same conditions as yesterday:
1. Beam intensity is reduced with the pepper pot 1/9 and by closing slits after the 15O target production and the accelerators so that the beam quality (emittance, etc...) is not affected.
2. VAMOS plate is removed to allow the direct beam detection
Results:
We measure in VAMOS with the LiF target and with the target ladder totally removed. In the latter case, direct beam 15O(8+) is sent in VAMOS and no charge state effect enter into the game.
1. Beam intensity at G1 profiler ~ 6.5e4 pps
VAMOS (FP) + no target ~ 3.8e4 pps
2. Beam intensity at G1 profiler ~ 3.8e4 pps
VAMOS (FP) + thick LiF (nb 1) ~ 2.0e4 pps
Discussion:
We find the same results as yesterday, e.g. a factor of two attenuation between the profiler and VAMOS. If part of this loss would happen in the pipe/target/MUST2 mask, this should be observed in AGATA which is not the case. Could it be that the PPAC in VAMOS is not as efficient as announced at the beginning of the campaign (98%)? This must be checked when we get beam back later on.
Note:
While doing the above measurement, we observed a factor of 3 loss between profiler AR.Gaz13 and G1.Gaz31. Numbers follows:
L3.GAZ42 AR.GAZ13 G1.GAZ31
2.1e4 1.5e4 4.1e3
1.4e5 1.0e5 2.5e4
??? 1.8e5 6.5e4 |
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Fixed, e768s, Tue Jul 23 15:03:54 2019, Diego Ramos, OTHER, Hardware, N/A, Diamond threshold
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| The threshold of the Diamond was increased from ~50 mV to ~300 mV |
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Fixed, e768s, Tue Jul 23 16:19:14 2019, Marlène, OTHER, Hardware, , VAMOS division
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VAMOS division was set 10 instead of 100.
CATS 1 & CATS2 scalers are sent to the two last channels of the scaler |
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Fixed, e768s, Tue Jul 23 19:21:50 2019, Nicolas, OTHER, Social, N/A, Waiting end of canicule (and beam!)
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Fixed, e768s, Wed Jul 24 12:40:49 2019, OttoRun, RUN, General, LiF, Run128
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Run : 128
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Start at 2019-07-24 12:40:32.602728
Test of scalers
Stop at 2019-07-24 12:43:18.414715
Stop comment: |
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Fixed, e768s, Wed Jul 24 13:33:34 2019, OttoRun, RUN, General, LiF, Run129
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Run : 129
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Start at 2019-07-24 13:29:27.436829
Test of scalers
Started with the setting of VAMOS with 15N beam + target. Plate removed.
Stop at 2019-07-24 14:22:17.151753
Stop comment: type your message here |
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Fixed, e768s, Wed Jul 24 14:41:09 2019, mugast, RUN, General, N/A, VAMOS divison 30
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| VAMOs division is set to 30 |
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Fixed, e768s, Wed Jul 24 14:57:51 2019, OttoRun, RUN, General, LiF, Run130
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Run : 130
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Start at 2019-07-24 14:45:43.707908
Test of scalers
Started with the setting of VAMOS with 15N beam + target. Plate removed.
Stop at 2019-07-24 14:57:53.598976
Stop comment: |
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Fixed, e768s, Wed Jul 24 15:12:07 2019, OttoRun, RUN, General, LiF, Run132
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Run : 132
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Start at 2019-07-24 15:05:21.496150
Test of scalers
Started with the setting of VAMOS with 15N beam + target. Plate removed.
Stop at 2019-07-24 15:53:35.796063
Stop comment: |
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Fixed, e768s, Wed Jul 24 16:04:04 2019, OttoRun, RUN, General, LiF, Run133
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Run : 133
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Start at 2019-07-24 16:01:41.339572
Stable 15N beam @ ~ 1-2e8 pps
Brho = Tm
target LiF thick number 1
Trigger:
MUGAST
VAMOS %30
BaF2 %100
Stop at 2019-07-24 16:44:55.787916
Stop comment: type your message here |
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Fixed, e768s, Wed Jul 24 16:24:18 2019, Nicolas, OTHER, General, , 19Ne / 19F analog connections
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Fixed, e768s, Wed Jul 24 16:51:16 2019, OttoRun, RUN, General, LiF, Run135
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Run : 135
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Start at 2019-07-24 16:43:07.051256
Stable 15N beam @ ~ 1-2e8 pps
Brho = 0.64 Tm (ref Brho = central trajectory)
target LiF thick number 1
Trigger:1100
MUGAST 1500
VAMOS %30 4500
BaF2 %100
DT 20%
Stop at 2019-07-25 07:21:33.253248
Stop comment: End of run 135 |
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Fixed, e768s, Wed Jul 24 17:21:27 2019, Diego, OTHER, General, , VAMOS Acceptance with different positions of the beam in the target
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Fixed, e768s, Wed Jul 24 22:10:04 2019, Chloé, Yorick, ONLINE, General, LiF, Spectra Run 135 24/07/19 22:00 6x
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Fixed, e768s, Thu Jul 25 03:58:19 2019, François et Gilbert, RUN, General, LiF, Spectra Run 135 25/07/19 4:00 6x
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Second snapshot of run 135
Spectra refreshed |
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Fixed, e768s, Thu Jul 25 07:00:15 2019, mugast, RUN, General, LiF, Run 135 - stop 6x
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Qpole 41 lost (Q41). Beam stopped before recovery.
Operator not able to get it back. Will try without waiting on next operator. |
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