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Fixed, e768s, Thu Jul 25 13:39:42 2019, mugast, BEAM, General, LiF, Beam stop due to high temperature
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A lot of Qpoles power supplies had to be shutdown.
Beam stopped at 13h30. |
Fixed, e768s, Thu Jul 25 17:19:52 2019, Freddy, OFFLINE, General, N/A, Scaler evolution + scaler file reader 
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Attached is a plot of several scaler (frequency as a function of time) for all data from run 120 to 140.
A software was written to process the scaler.dat files and is located in:
~/analysis/scalereader/
you can find an example of how to execute it in:
~/analysis/scalereader/exe.sh |
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Fixed, e768s, Thu Jul 25 22:39:36 2019, OttoRun, RUN, General, LiF, Run142
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*************************
Run : 142
*************************
Start at 2019-07-25 22:38:24.221932
Stable 15N beam @ ~ 1-2e8 pps
Brho = 0.64 Tm
target LiF thick number 1
Trigger:1100
MUGAST 1500
VAMOS %30 4500
BaF2 %100
DT 20%
Stop at 2019-07-25 22:39:38.630461
Stop comment:
Stop at 2019-07-25 22:40:46.703893
Stop comment: |
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Fixed, e768s, Thu Jul 25 22:41:45 2019, OttoRun, RUN, General, LiF, Run141
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*************************
Run : 141
*************************
Start at 2019-07-25 22:17:59.731998
Stable 15N beam @ ~ 1-2e8 pps
Brho = 0.64 Tm
target LiF thick number 1
Trigger:1100
MUGAST 1500
VAMOS %30 4500
BaF2 %100
DT 20%
Stop at 2019-07-25 23:12:23.531303
Stop comment: type your message here
Stop at 2019-07-25 23:52:43.071266
Stop comment: |
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Fixed, e768s, Fri Jul 26 00:02:49 2019, OttoRun, RUN, General, LiF, Run145
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*************************
Run : 145
*************************
Start at 2019-07-26 00:02:47.736491
Stable 15N beam @ ~ 1-2e8 pps
Brho = 0.64 Tm
target LiF thick number 1
Trigger:1100
MUGAST 1500
VAMOS %30 4500
BaF2 %100
DT 20%
Stop at 2019-07-26 00:05:20.102301
Stop comment: |
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Fixed, e768s, Fri Jul 26 01:10:40 2019, OttoRun, RUN, General, LiF, Run146
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*************************
Run : 146
*************************
Start at 2019-07-26 01:10:37.108944
Stable 15N beam @ ~ 1-2e8 pps
Brho = 0.64 Tm
target LiF thick number 1
Trigger:1100
MUGAST 1500
VAMOS %30 4500
BaF2 %100
DT 20%
Stop at 2019-07-26 01:47:40.674486
Stop comment:
Stop at 2019-07-26 01:47:41.740128
Stop comment: |
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Fixed, e768s, Fri Jul 26 01:47:44 2019, OttoRun, RUN, General, LiF, Run147
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*************************
Run : 147
*************************
Start at 2019-07-26 01:34:36.740174
Stable 15N beam @ ~ 1-2e8 pps
Brho = 0.64 Tm
target LiF thick number 1
Trigger:1100
MUGAST 1500
VAMOS %30 4500
BaF2 %100
DT 20% |
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Fixed, e768s, Fri Jul 26 01:54:56 2019, OttoRun, RUN, General, LiF, Run148
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*************************
Run : 148
*************************
Start at 2019-07-26 01:54:28.790057
Stable 15N beam @ ~ 1-2e8 pps
Brho = 0.64 Tm
target LiF thick number 1
Trigger:1100
MUGAST 1500
VAMOS %30 4500
BaF2 %100
DT 20%
First run with AGATA coupling after GECO problems |
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Fixed, e768s, Fri Jul 26 02:27:48 2019, Marlène, Faïrouz, Franck, Bertrand, Sylvain, Diego, Nicolas, BEAM, General, , G1 profiler efficiency
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G1 profiler efficiency was checked against CATS1 for two beam intensities. Agreement between the two measurements is within 20%
Profiler -> CATS1
2.3e4 pps -> 1.8e4 pps
1.4e5 pps -> 1.16e5 pps
Conclusion:
G1 profiler is measuring correctly the beam intensity for these intensities |
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Fixed, e768s, Fri Jul 26 02:33:22 2019, OttoRun, RUN, General, LiF, Run149
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*************************
Run : 149
*************************
Start at 2019-07-26 02:26:03.929449
Stable 15N beam @ ~ 1-2e8 pps
Brho = 0.64 Tm
target LiF thick number 1
Trigger:1100
MUGAST 1500
VAMOS %30 4500
BaF2 %100
DT 20%
First run with AGATA coupling after GECO problems
Stop at 2019-07-26 02:33:24.488936
Stop comment:
Stop at 2019-07-26 07:26:30.715336
Stop comment: beam gave back to PCP to prepare 15O |
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Fixed, e768s, Fri Jul 26 03:59:11 2019, Kseniia, Franck, ONLINE, General, LiF, Run 149 screenshots 17x
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Fixed, e768s, Fri Jul 26 05:57:04 2019, Kseniia, Franck, ONLINE, General, LiF, Run 149 screenshots 17x
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A second beam component is visible in particular in IC energy losses (with Z larger than 7) and in MW.
This probably corresponds to the 15O from the Spiral target-ion source being warmed up by the primary beam that has increased overnight (~1200 W at 5:45 am).
Checked by reducing the primary intensity for a few minutes: the second component decreased to a level comparable to that at the beginning of run 149. |
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Fixed, e768s, Fri Jul 26 08:56:50 2019, Kseniia, AGATA, General, LiF, 135-149 run Gamma analysis
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19F Q8 charge state identified in VAMOS
Still no clear peak at 3908 keV... |
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Fixed, e768s, Fri Jul 26 11:21:19 2019, OttoRun, RUN, General, LiF, Run150
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*************************
Run : 150
*************************
Start at 2019-07-26 11:20:46.797360
Stable 15N beam @ ~ 1-2e8 pps
Brho = 0.556 Tm
target LiF thick number 1
Trigger:1100
MUGAST 1500
VAMOS %30 4500
BaF2 %100
DT 20%
15O run tunning of VAMOS
Stop at 2019-07-26 12:16:09.408851
Stop comment: |
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Pending, , Fri Jul 26 11:25:46 2019, UK refugees, OTHER, General, , Be positive and the experiment will work if we put lead in our pencil
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Fixed, e768s, Fri Jul 26 12:21:50 2019, OttoRun, RUN, General, LiF, Run151
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*************************
Run : 151
*************************
Start at 2019-07-26 12:18:19.935601
15O beam @ ~ 1.5e7 pps (profiler)
Brho = 0.556 Tm
target LiF thick number 1
Trigger:
FAG 190
MUGAST 180
VAMOS %30 680
BaF2 %100 119
DT ??? (pb with pulser settings)
Stop at 2019-07-26 15:28:24.237536
Stop comment: stop because VAMOS division changed |
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Fixed, e768s, Fri Jul 26 13:48:41 2019, Marlène, Faïrouz, Bertrand & Nicolas, BEAM, General, , G1 profiler & VAMOS efficiency
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Factor of two between the profiler and VAMOS FP determination of incident beam is now understood.
Several effects were at work simultaneously and checked at 2 beam intensities (9e3 pps and 5e4 pps):
1. Profiler is using energy loss of the crossing beam particles to deduce the beam intensity. But the profiler was set to 15N instead of 15O.
We checked that for the same beam intensity of 15O the profiler gives 1.2e4 pps / 9e3 pps when tuned on 15N / 15O respectively. This amouts for 75% difference
2. Profiler tends to overestimate the real beam intensity by about 20% when compared to CATS1
Profiler / CATS1: 9e3 pps / 7.3e3 pps (81%)
Profiler / CATS1: 5e4 pps / 3.9e4 pps (78%)
3. VAMOS counting rates are lower than CATS1 by 20% which is consistent with the charge state distribution q(8+)/q(7+) = 80% calculated from LISE++
CATS1 / VAMOS: 7.5e3 pps / 5.8e3 pps (78%)
CATS1 / VAMOS: 3.9e4 pps / 3.0e4 pps (77%)
4. VAMOS PPAC efficiency was checked to be 100%: the PPAC logic signal is always present when triggerd by the drift chamber logic signal
Results:
By combining all previous factors and for 15O beam at the beginning of the experiment we obtain between the profiler and VAMOS FP a reduction factor of: 0.75 * 0.81 * 0.78 = 47%, CQFD!
Discussion:
This factor of two explains the difference we always observed when comparing estimated and measured g-ray yields. |
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Fixed, e768s, Fri Jul 26 14:06:33 2019, mugast, ONLINE, General, LiF, Screenshots run 151_1 20x
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Fixed, e768s, Fri Jul 26 15:33:49 2019, OttoRun, RUN, General, LiF, Run152
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*************************
Run : 152
*************************
Start at 2019-07-26 15:32:47.731907
15O beam @ ~ 1.5e7 pps (profiler)
Brho = 0.556 Tm
target LiF thick number 1
Trigger:
FAG 190
MUGAST 180
VAMOS %10 580
BaF2 %100 119
DT 5%
Stop at 2019-07-27 10:50:59.108445
Stop comment: change run |
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Fixed, e768s, Fri Jul 26 15:48:12 2019, Kseniia, AGATA, General, , Full stats with AGATA on 19F with the 15N beam
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Charge state 8 (plus zooms) and charge state 7;
Statistics of all the 15N runs combined;
Identification in VAMOS;
Alas, no clear peaks at 3908 and 2354. |
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