Fixed, e793s, Fri Mar 12 03:21:01 2021, Taras, Chloe, NIshu, Charlie, VAMOS, General, CD2, VAMOS trip, requires help (FIXED @ 03:55) 
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We received a call from PCP telling us that VAMOS has tripped. Currents on all focal planes are 0. We tried stopping and restarting the FP_CATS0 - FP_CATS5, but this does not resolve the issue.
A picture of the VAMOS control screen is attached. Diego has been contacted.
EDIT:::
Diego has informed us that the focal plane current is not the issue. The problem instead is with G1.G.D4.P (dipole?) in VAMOS. This has tripped off (see second attached image). He has advised us to call Bertrand to fix this.
EDIT2:::
Bertrand called an operator, and the VAMOS count rate is now back up to normal. The whole process from crash to fix took ~half an hour |
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Fixed, e768s, Wed Jul 31 08:16:34 2019, Sylvain, Nicolas, BEAM, General, LiF, Beam profile and scaler at 08:00
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Fixed, e786s, Tue Jun 25 02:46:32 2019, Sylvain, Louis, OFFLINE, General, Cryo-3He, Offline analysis run 56
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| Offline analysis of run 56 has been perfomed. On plots, kinematics lines and excitation energy are shown using gate on 47K in vamos. Then agata spectra is shown using gate on 47K in VAMOS un valid event in MUGAST. One can (may be) distinguish a peak at 368keV... |
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Fixed, e786s, Tue Jun 25 02:53:18 2019, Sylvain, Louis, BEAM, General, Cryo-3He, NO BEAM
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| No beam since 22h due to signal of neutron detectors. Then the diffuclty to set the beam due to thunders. Finally impossible to get back the beam because source sample is empty. No beam before tomorow 12h... |
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Fixed, e786s, Wed Jun 26 20:46:20 2019, Sylvain, Louis, RUN, General, Cryo-3He, run 62 screenshots 18x
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Fixed, e744s, Sun Apr 14 06:35:43 2019, Sylvain, Faïrouz, Chloé, Damien & Iulia, RUN, General, CH2, Log & Scalers -- Run 122 at 06:40 19x
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Fixed, e768s, Sat Jul 20 23:32:44 2019, Sylvain Fairouz, OFFLINE, General, , Trying to understand AGATA g-ray yields
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| Marlene, Nicolas, Christian, Fairouz wrote: | goal: we want to check whether the yields of the 1297.7 keV (from 19Ne 1536, 3/2+, l=1 state) and 1340 keV (from 19Ne 1615, 3/2-, l=2 state) g-ray lines is compatible with what we expect from x-sec calculations
conditions: we consider runs 112, 115 and 116
observations:
N(1297) = 17 g-rays
N(1340) = 23 g-rays
remarks:
Given x-sec from mirror nucleus (Francois 15N(7Limt) paper) we expect N(1340) >~ N(1297)
ingredients:
1. beam normalization
We use the TAC_FPMW_HF as a proxy. During the same time we integrate the prompt peak and compare the integrated OR VAMOS scaler, we find Scaler(OR VAMOS)/N(TAC) = 193.
We use the comparison of the OR VAMOS (pps) and the beam profiler (pps), we find profiler/OR VAMOS = 1e4
We obtain (2.17e5 + 6.44e4 + 3.52e5)*193*1e4 = 1.2 e12 15O incident particles (at profiler position!)
2. target thickness -> known to be 1.25 mg/cm2 of LiF (RBS measurement)
N(Li) = 1.25e-3 / (19+7) * 6.02e23 at/cm2
3.efficiencies
AGATA @ 1.3 MeV -> 7.5 %
VAMOS intrinsic -> 67 % (Eff_Check.C macro applied to run 116)
MUGAST -> 50 % (lab, geometry), needed because MUGAST is the main trigger
4. 19Ne charge state
we assume 40 % for 9+
5. g-ray branching ratio -> taken from NNDC
6. cross-section
we calculate differential cross section for the 1536-keV 19Ne state (FRESCO, FR-DWBA)
-> at 0 deg, ds/dW =
-> integrated x-sec in VAMOS acceptance (4 deg (lab) -> 20 deg (cm)) = 445 micro barn (C2Sa = 1)
-> taking into account know spectroscopic factor form analog state -> 89 micro barn
Conclusion:
for the 1536-keV 19Ne state we obtain 30 g-rays, instead of 17.
Discussion:
This factor of two could be well within the mirror symmetry assumption. However it seems it is also the case for the 1615-keV 19Ne state, so would not it be a systematic error with a factor of two missing somewhere (beam transmission between the profiler and the target? deficiencies?)? |
We have investigated quickly the 15N(7Li,t)19F reaction based on run 0072. (gamma spectrum corresponding to all run data and with doppler correction with beta 0.08 can be found in /data/mugastX/mugast/acquisition/root/Run72_19Fe_8p.root)
To simplify the analysis the TS were restricted from 46000s to 52000s (/data/mugastX/mugast/acquisition/root/Run72_19Fe_8p_TSGate.root). The beam intentisty was assumed constant and equal to 1.e8 pps (for a total of 6.e11 beam like particle)
The 3/2+ and 3/2- states in 19F produce respectively 1356keV and 1348keV gamma. Counts were estimated roughly with double gaussian fit to be equal to
I(1348) = 21.9 counts
I(1256) = 16.4 counts
Assuming all others parameters are comparable with the previous analysis the counting obtained seems consistent with the measured Salpha=0,2 in previous experiment, Everything seems ok based on this very rough first analysis |
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Fixed, e768s, Mon Jul 29 15:20:50 2019, Sylvain Andres, Freddy, Adrien, Franck, BEAM, General, LiF, Beam profile after beam intensity obtimisation
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| Beam recover at around 15:00 after beam optimisation by PCP |
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Fixed, e744s, Wed Apr 17 16:53:53 2019, Sylvain (AGATA), AGATA, General, 152Eu, Run 137 : Eu calibration
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Run stared 2019/04/17
EU efficiency Calibration |
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Fixed, e768s, Wed Jul 31 14:07:24 2019, Sylvain & Nicolas, BEAM, General, LiF, Beam profile & scalers
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Pinned, e768s, Sat Jul 27 04:12:57 2019, Sylvain & Freddy, BEAM, General, LiF, Run 152 - Scaler & screenshot + Beam profile 14x
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Ongoing, e768s, Mon Jul 29 22:50:43 2019, Sylvain & Freddy, ONLINE, General, LiF, Screenshots run 158 @ 22h05 19x
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Fixed, e768s, Sun Jul 28 08:20:38 2019, Sylvain & Franco, RUN, General, , Update on possible restart
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The problem that caused the interruption was due to a failure in the cooling system.
The last update we've had is that we might have the beam back not before late afternoon.
We will keep you updated. |
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Pinned, e768s, Sat Jul 27 06:47:16 2019, Sylvain & Andrea, OTHER, General, LiF, Water tray of MUGAST air conditioner cooling system is almost full
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During a room inspection it was notice that the water tray used as an output of the fan system which is cooling MUGAST electronic crates is almost full of water. The floor is dry but the we suspect a leakage from the air conditioner. To avoid to flood the floor we took some of the water and put in in the water tray of the fan system located in front of VAMOS.
One would probably need during the day to investigate the origin of this water. |
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Fixed, e768s, Sat Jul 27 07:02:44 2019, Sylvain & Andrea, ONLINE, General, LiF, Beam profile and scaler
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Fixed, e768s, Sat Jul 27 07:20:33 2019, Sylvain & Andrea, ONLINE, General, LiF, Run 152 : Beam profile and scaler 20x
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Fixed, e744s, Sat Apr 13 18:00:12 2019, Sylvain, RUN, General, CH2, Log & Scalers -- Run 122 at 17:45 20x
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| Log for run 122 taken at 17h45 |
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Fixed, e744s, Sat Apr 13 20:02:36 2019, Sylvain, RUN, General, CH2, Log & Scalers -- Run 122 at 19:45 21x
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| Log & Scalers -- Run 122 at 19:45 |
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Fixed, e744s, Sat Apr 13 21:47:40 2019, Sylvain, RUN, General, CH2, Log & Scalers -- Run 122 at 21:45 20x
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Fixed, e768s, Sat Jul 20 01:02:10 2019, Serge & Franco, OTHER, General, , Night shift beam & resync
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timeline of run 116
00:xx resync Agata #13C
00:57 lost beam, back at full intensity at 01:12
01:30 lost beam, back at full intensity at 01:45
01:37 FP_CATS5 tripped, reset
01:43 resync Agata #13C
02:04 resync Agata #13C
02:20 lost beam, back at full intensity at 02:30
02:36 resync Agata #13C
03:45 Vamos rate down to 900 pps, checked that intensity on profiler is 1.1e7 so decided to continue
05:58 resync Agata #13C
06:55 Vamos rate at 1400 pps but diamond is decreasing since several hours: we had 17500 counts at midnight and now only 7500.
Checked beam rate on profiler and found 1.8e7 so indeed it is the diamond efficiency that is going down steeply |
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