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Fixed, e768s, Sat Jul 20 21:10:57 2019, Faïrouz & Sylvain, RUN, General, LiF, Run 118 stopped because VXI Vamos turned offline because of overheat
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| Run 118 stopped because VXI Vamos turned offline of overheat |
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Fixed, e768s, Sat Jul 20 23:18:02 2019, OttoRun, RUN, General, LiF, Run119
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Run : 119
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Start at 2019-07-20 23:17:24.464827
Start after SECOND overtemperature of VXI VAMOS.
Stop at 2019-07-21 20:12:21.834156
Stop comment: stopped because intensity dropped to 6e6 pps (profiler) PCP working on optimization |
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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 |
Fixed, e768s, Sat Jul 20 23:43:02 2019, mugast, RUN, General, LiF, Run 119 (Problem with VXI fixed for the moment) 
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Run 119.
Or-Vamos= 1430 ---> I=1.43x10^7 pps |
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Fixed, e768s, Sat Jul 20 23:57:34 2019, Diego, OFFLINE, General, , VAMOS acceptance, comparison between 9+ and 10+ states
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Figures above, simulation of VAMOS acceptance for 10+ and 9+ 19Ne charge states. Ratio between them quite big (0.58)
Figures below, comparison of the states with offline data. Ratio much smaller.
It seems like acceptance doesn't cut the 10+ charge state too much, but 10+ is less produced than 9+. |
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Fixed, e768s, Sun Jul 21 01:57:59 2019, Jenn & Franck, ONLINE, General, LiF, Screenshots run 119 21x
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Fixed, e768s, Sun Jul 21 04:48:52 2019, Jenn & Franck, BEAM, General, N/A, Beam intensity check
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OR Vamos: 1300 /s
Vamos gas profiler: 1.7x10^7 pps |
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Fixed, e768s, Sun Jul 21 09:10:50 2019, Didier & Nicolas, BEAM, General, N/A, Beam intensity check
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| Jenn & Franck wrote: | OR Vamos: 1300 /s
Vamos gas profiler: 1.7x10^7 pps |
OR VAMOS: ~ 1280 Hz
VAMOS gas profiler: 1.7e7 pps |
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Fixed, e768s, Sun Jul 21 10:58:39 2019, Christian, AGATA, General, LiF, 13c resync
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13c resync at 10.57
lost 5 min agata data |
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Fixed, e768s, Sun Jul 21 11:49:59 2019, Christiqn qnd Didier, RUN, General, LiF, Run 119 screenshots
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Fixed, e768s, Sun Jul 21 14:54:28 2019, Marlène, RUN, General, , run 119 scalers
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Fixed, e768s, Sun Jul 21 16:39:38 2019, Marlène, Antoine, BEAM, General, , IMPORTANT :How to send scalers to PCP
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Go to PCP
Open a terminal
> ssh -X mugast@ganp154
passwd : Spiral1+
> ./LaunchScalers.sh |
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Fixed, e768s, Sun Jul 21 16:42:20 2019, Marlène, OFFLINE, General, , Conversion of data from AGATA :update
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When VAMOS VXI crashed (run 118) the Action file was recompiled.
As AGATA conversion is not copying the ACTION file for each run, it used the old version by default (from 16th of july).
We have modified the do_global_replay.sh so that it takes the ACTION file from the Replay directory where we have copied the ACTION file for run_0119.
So for conversion of file before run 119, the ACTION file in the zworkingDir of AGATA should be used.
For all conversion of runs after run 119, the ACTION file in the Replay directory should be used. |
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Fixed, e768s, Sun Jul 21 17:02:25 2019, Marlène, BEAM, General, , beam intensity in the afternoon
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Fixed, e768s, Sun Jul 21 17:45:54 2019, kseniia, AGATA, General, , Current total stats on 19Ne
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Stats from runs 112, 115, 116, 117, 118, 119(~15h)
beta = 8%
Q = 9 & 10 |
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Fixed, e768s, Sun Jul 21 17:57:08 2019, Christian, OTHER, General, , Previous Papers - gamma decays from states in the 4-MeV region
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In comment to previous entry (see thread), on the 2019 Hall paper on 19Ne transitions:
Note that Fig 4.c is described as: Gated on the 238-keV 5/2+ to ground-state transition. The 3897.5-keV transition from the 4141.8-keV state is observed for the first time. This means the spectrum is designed such that it wold not show the 4033 transition. Therefore, whether they are sensitive to this is an open question. See also PhD thesis of Hall for further details? |
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Fixed, e768s, Sun Jul 21 17:59:04 2019, Christian, VAMOS, Hardware, LiF, Diamond detector trigger level and rate dependency
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The diamond detector has tended to increase in rate when it is hot (peaking late afternoon) and decreasing when it is cold (with a minimum just before sun-rise). Some of the rate could therefore be temperature dependent noise levels rising above the trigger threshold.
We are currently triggering around 70mV, far below the peak signal value of 1.4V (by about a factor of 20). While we cannot expect to see most of them at the peak value because of poor resolution and potentially different particle energies, we should expect the vast majority of real heavy-ion signals to fall above 1/4 of the peak height. When we go into the vault on Tuesday, we should therefore raise the thresholds by about a factor of 5, to see whether this stabilises the rate.
Irrespective of this, with the beam deposited so far from the detector as is the case, we should only see halo and/or reaction products, and we would not be able to use this as a beam intensity monitor, irrespective of performance. At best as a beam-quality monitor. |
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Fixed, e768s, Sun Jul 21 20:13:57 2019, Kseniia, Franco & Nicolas, BEAM, General, N/A, Beam intensity check
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| Didier & Nicolas wrote: |
| Jenn & Franck wrote: | OR Vamos: 1300 /s
Vamos gas profiler: 1.7x10^7 pps |
OR VAMOS: ~ 1280 Hz
VAMOS gas profiler: 1.7e7 pps |
OR VAMOS: ~ 1700 Hz
VAMOS gas profiler: 6e6 pps
beam moved in the horizontal plane (compare last 2 pictures of beam profiler) |
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Fixed, e768s, Sun Jul 21 21:22:58 2019, OttoRun, RUN, General, LiF, Run120
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*************************
Run : 120
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Start at 2019-07-21 21:19:46.530036
beam intensity after optimization 1.6e7 pps
OR VAMOS ~ 1500 Hz
Target: 1.25 mg/cm2 (nb 1) 7LiF
Triggers
MUGAST (backward, MM, 90 deg)
VAMOS %100
BaF2 %100
Stop at 2019-07-21 21:52:56.667021
Stop comment: |
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Fixed, e768s, Sun Jul 21 22:17:18 2019, OttoRun, RUN, General, LiF, Run121
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*************************
Run : 121
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Start at 2019-07-21 21:54:19.075515
beam intensity after optimization 1.6e7 pps
OR VAMOS ~ 1500 Hz
Target: 1.25 mg/cm2 (nb 1) 7LiF
Triggers
MUGAST (backward, MM, 90 deg)
VAMOS %100
BaF2 %100
Stop at 2019-07-22 05:09:23.310656
Stop comment: Problems with AGATA. Need to stop acquisition to recover AGATA validation |
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