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Fixed, e768s, Mon Jul 22 16:54:33 2019, Marlène, Franck, François & Nicolas, BEAM, General, , Cheking beam transmission from G1 profiler to VAMOS
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Goal:
Estimate beam transmission from profiler to VAMOS (FP)
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Fixed, e768s, Mon Jul 22 17:07:39 2019, Marlène, Franck, François & Nicolas, BEAM, General, , Profiler conditions for measuring beam intensity
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We checked that the measured beam intensity (present case 1.5e7 pps) is independent on the voltage on the profiler. Values from 93 V up to 177 V gave similar
results. |
Fixed, , Mon Jul 22 19:13:45 2019, Kseniia, AGATA, General, , Current stats on 19Ne 
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| Runs 112..125, still no joy... |
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Fixed, e768s, Tue Jul 23 04:31:34 2019, Jenn & Christian, BEAM, General, , Diamond Scaler screenshot
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Fixed, e768s, Tue Jul 23 04:34:03 2019, Jenn & Christian, BEAM, General, , Beam intensity and profile check
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VAMOS OR: ~1200
BEAM INTENSITY ~ 2E7 |
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Fixed, e768s, Tue Jul 23 06:49:54 2019, Jenn & Christian & Kseniia, BEAM, General, , Beam intensity and profile check
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VAMOS OR ~ 870
BEAM INTENSITY ~ 1.4E7 |
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Fixed, e768s, Tue Jul 23 09:03:07 2019, Kseniia, Gilbert, Yorick, BEAM, General, , Beam intensity and screenshots 25x
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| The beam has been pretty stable since yesterday |
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Fixed, e768s, Tue Jul 23 11:02:54 2019, Kseniia, Gilbert, BEAM, General, , Beam profile
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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:
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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, , Tue Jul 23 17:09:43 2019, UK refugees, OTHER, Social, , Kipper issues.
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Fixed, , Tue Jul 23 23:22:56 2019, UK refugees, OTHER, Social, , Kipper issues.
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| I would mail you some but the postage is nuts those days! |
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Fixed, , Wed Jul 24 12:44:55 2019, UK refugees, OTHER, General, , Fire out thanks to de Piffle
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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 17:21:27 2019, Diego, OTHER, General, , VAMOS Acceptance with different positions of the beam in the target
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Fixed, e768s, Thu Jul 25 11:05:18 2019, Francois de Oliveira, OTHER, General, , Previous Papers - alpha-branching ratios for states in the 4-MeV region
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In the reaction 15N(7Li,t)19F, the ratio between the measured cross sections is R(3/2+/9/2-)>29. We should get the same ratio in 19Ne. In 19Ne, the 3/2+
state decays with Eg=4033 keV (80%), the second with 2632 keV (100%), gamma efficiency = 4% and 5.5%, this gives a ratio between the number of counts measured
in the 2632 keV and in the 4033 keV > 29 x 100/80 x 5.5 / 4 ~ 50. |
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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
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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 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):
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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;
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