| Status |
ExpNbr |
Date |
Author |
Type |
Category |
Target-Source |
Subject |
| Fixed | e744s |
Wed Apr 10 06:45:53 2019 |
François | BEAM | Social | | No beam yet |
| They are about to align the beam from the cyclotron CIME to the area G1. |
| Fixed | e744s |
Wed Apr 10 07:15:22 2019 |
François | BEAM | Social | | no beam |
They aligned the beam up to G1 Pr31 but the stripper foil was not inserted, so they have to start the work again. |
| Fixed | e744s |
Wed Apr 10 09:05:33 2019 |
François | BEAM | Social | | No beam in G1 yet. |
| The beam is at the entrance of G1. |
| Fixed | e744s |
Wed Apr 10 10:15:38 2019 |
François | BEAM | Social | | Beam stopped |
A problem with the cooling water.
2 UT at least to restart the accelerator |
| Fixed | e744s |
Thu Apr 11 02:12:42 2019 |
François | TARGET | General | | Measured target thicknesses |
CATS2
Incident beam 14N7+ Brho 0.79 Tm
Brho (6+) measured after CATS2 = 0.9148 Tm => energy = 7.38627 MeV/u
Measured = 3.97 µm mylar + 20 mm gas
N°2 CH2 104 µm
= 9.67 mg/cm2 (polyethylene density = 0.93 g/cm3) Georges@2018
Measured :
Brho(6+) = 0.7473 Tm => E=4.9355 MeV/u => e=109.7 µm
Brho(5+) = 0.8924 Tm => E=4.8874 MeV/u => e=111.5 µm
Measured e=110.6 µm
N°3 CH2 100 µm Goodfellow (polyethylene)
Measured Brho(6+)=0.7754 Tm => E=5.3126 MeV/u
Measured e= 95 µm
N°4 Carbon 75 µm
=> 6.75 < thick < 9.75 mg/cm2 (Graphite flexible, density 0,9-1,3 g/cm3) Goodfellow
measured Brho(6+)=0.811 Tm (very broad) => E=5.81006 MeV/u
Measured e=8.4 mg/cm2
N°5 CH2 73 µm Georges@2019
N°6 CH2 104 µm Georges@2019 |
| Fixed | e744s |
Thu Apr 11 17:35:21 2019 |
François | BEAM | General | | 14O beam is in G1 since 17H00 |
alignment of the beam in VAMOS
intensity ~ 5x10^3 pps |
| Fixed | e744s |
Fri Apr 12 00:29:11 2019 |
François | BEAM | General | | no beam |
They aligned the beam from CIME to G1 with 15N.
They are now working with 14O.
No beam on G1. |
| Fixed | e744s |
Fri Apr 12 02:19:02 2019 |
Francois, Jenn, Cyril, Louis | CATS | Hardware | N/A | Set Division for CATS and Agata |
Enter in G1 to set division on CATS and Agata
CATS divion: 1000
Agata division: 100
|
| 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 |
| 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. |
| Fixed | e744s |
Mon Apr 8 00:41:53 2019 |
Francois | OTHER | General | | Predictions for VAMOS plots with 14N and 14O beams |
|
| Attachment 1: Kineplots.pdf
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| Fixed | e744s |
Sun Apr 14 16:28:06 2019 |
Francois | OFFLINE | General | | prediction Ep from (p,gamma) |
| Predictions to compare with measurement |
| Attachment 1: predict.jpg
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| Attachment 2: EPCM_Brho_gamma.png
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| Fixed | e768s |
Tue Jul 16 12:10:05 2019 |
Francois | BEAM | General | LiF | beam intensity, normalisation, elastic scattering 7Li |
In 2005, the 15O1+ beam was measured at 6x10^7 pps after the CIME cyclotron, contaminated with ~nAe of 15N1+.
After stripper (aluminium stripper at LISE) the purity was 97 % of 15O8+ with 3 % of 15N8+.
The 15N(7Li,7Li)15N cross section has been measured at 27.3 MeV (18.6 MeV CM) (see images). It is Rutherford at angles <10° CM.
In the present experiment, the energy CM is 22.4 MeV CM.
10°CM correspond to 85° in lab, 7Li with energy ~ 0.46 MeV.
Conclusions:
- it is not possible to normalise to the Rutherford cross section of 7Li
- expected beam intensity at nominal should be > 10^7 pps (a factor less than 2 between 1+ and 3+, 40% of 8+ after stripper) |
| Attachment 1: scattering.jpg
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| Attachment 2: scattering2.jpg
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| Fixed | e768s |
Wed Jul 17 08:00:34 2019 |
Francois | BEAM | General | LiF | summary of the night |
0h-2H : beam tuning
2H Qpole down
4H Qpole problem solved but AGATA GGP problem
5H30 merging of AGATA-VAMOS = problem with numexo2 vamos DC...
7H45 solved, it was not numexo2, some soft problem |
| Fixed | e768s |
Wed Jul 17 10:55:23 2019 |
Francois | OFFLINE | General | | previous measurement of 15N(7Li,t) |
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| Attachment 1: previous.pdf
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| Fixed | e768s |
Fri Jul 26 23:45:18 2019 |
Franco, Andres, Daniele | OFFLINE | General | LiF | ExEgamma spectra for 15O from run 112 to 152_0 |
|
| Attachment 1: 19Ne_112-152.png
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| Fixed | TEST |
Thu Jan 23 14:06:51 2020 |
Franco&Marlène | GRIT | Hardware | 3-alpha | Status of detectors on 23-01-20 |
Short alpha source run (not saved on disk) to test the detectors.
Summary :
- MG1,3,4,5 and 7 are all OK (few more strips missing on Y)
- MM1,2,4 OK
- MM3 has a lot of strip missing both in X and Y and current has increased wince last campaign (4uA)--> katpon should be checked |
| Attachment 1: mg_impact_alpha_23-01-2020.png
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| Attachment 2: mg_Y_raw_alpha_23-01-2021.png
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| Attachment 3: mg_X_alpha_23-01-2021.png
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| Attachment 4: mm_impact_alpha_23-01-2020.png
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| Attachment 5: mm_Y_alpha_23-01-2020.png
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| Attachment 6: mm_X_alpha_23-01-2020.png
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| Fixed | TEST |
Mon Feb 10 18:42:23 2020 |
Franco&Marlène | GRIT | Hardware | | New MUGAST detectors MG2 MG6 |
MG2 and MG6 have been mounted in the chamber.
MG2 reference number is 3227_10 thickness=468um
MG6 3227_7 thickness=473um
Nominal depletion =35V |
| Fixed | |
Fri Feb 14 10:26:46 2020 |
Franco&Marlène | GRIT | Hardware | | HT BT screenshots before e775s |
| Detectors are cooled down to 0 deg. |
| Attachment 1: BT_CAEN2_MGnew.png
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| Attachment 2: BT_CAEN1_part1_MM.png
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| Attachment 3: BT_CAEN1_part2_MG.png
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| Attachment 4: HV_part1_MM_MG.png
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| Attachment 5: HV_part2_MG.png
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| Fixed | e793s |
Thu Mar 12 15:48:58 2020 |
Franco&Marlène | GRIT | General | | Summary and TO DO list 12/03/2020 |
What remains to be done
- Do the time calibration of all boards (time calibrator has to be connected)
. When checking the pulser on all boards we saw that MG5 has no triggers on Y and MG9 does not see the pulser (neither X or Y). So we will not get time calibration for those
- Plug the STOP in the MUVI (either clean HF that was used in the previous experiment or CATS2 clean that was also prepared during the last experiment but should be connected)
- Rename parameters in the GECO of the experiment
. We now run only with 3 MUVI, MG9 (square) is put in channel 3 of MUVI2 (where MG6 was plugged before)
. We changed the names for the ACTION_mugast.CHC_PAR but it has to be done for the experiment file)
- Targets will be mounted last week before the experiment. The surveyor have to remeasure the position of all targets.
- hvm_watcher has to be modified according to the changes made on the distribution boxes :
. MG9 is on the LV/BT of the new distribution box on channel 6
. MM1 is on channel 5 of the MUST2 distribution box (instead of channel 1).
We noticed instabilities in the current of the MUST2 detectors : T1 is fluctuating from time to time and T2 current is increasing slowly but surely.
We now run with 60V on MM1 and MM2 and 70V on MM3 and MM4.
The fluctuations on MM1 are usually solved when cooling down to 0 degree.
!! We do not leave HV and LV on when there is nobody to check the temperature of the boards and the coolers. |
| Fixed | e775s |
Tue Feb 25 16:31:17 2020 |
Franco , Freddy | OFFLINE | General | N/A | M/M_Q PID for unbound states |
| When gating on excitation energy higer than Sn (7.6 MeV), mainly 19O remains in the PID of VAMOS |
| Attachment 1: run128_MM_MMQ.png
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| Attachment 2: run128_Ex_gatedMQ_numbers.png
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