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Fixed, e768s, Fri Jul 12 17:51:06 2019, mugast (Sylvain, Chloe, François, Marlčne, Nicolas), OTHER, General, , Monitoring of beam profile with BAF2
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In order to provide a efficient way for PCP to monitor beam profile a new TAC measurement has set up.
A BAF2 detector has been inserted close to the reaction chamber (in position 7 of AGATA structure frame). Operating voltage of BaF2 is 1800V and the typical signal amplitude is above 100 mV.
The output signal is sent to a TFA (with gain =1). No additional delay was used. The BAF2 trigger signal is made from CFD and used as a start a TAC. TAC range was chosen to 1us.
The trigger signal was also sent to GMT trough input nb 5.
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Fixed, TEST, Wed Feb 12 16:24:52 2020, Marlčne, Freddy & Franco, MUST2, Hardware, , Modifications on the electronic scheme
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We cleaned the electronic scheme.
Now the HF CLEAN VAMOS is taken directly from VAMOS and not re-cleaned by us.
TACs are all ok. Inspection lines have been checked and labeled.
GMT and Scalers are like below.
GMT:
1 - MUVI 1 (MG1, MG3, MG4, MG5)
2 - MUVI 2 (MG7, MG2, MG6, MG11)
3 - MUVI 3 (MM1, MM2, MM3, MM4)
4 - MUVI 4 (MG9 90-deg MUST2)
5 - COINCIDENCE VAMOS-AGATA
6 - VAMOS DIV
7 - MUST2 DIV
8 - broken
9 - SQUARE DIV
10 - AGATA DIV
11 - VAMOS
12 - empty
13 - empty
14 - empty
15 - broken
16 - empty
SCALERS:
1 - FAG
2 - OR MUGAST
3 - AGATA
4 - VAMOS
5 - empty
6 - DEAD TIME MUGAST
7 - 100 Hz PULSER
8 - DEAD TIME
9 - MUVI 1 (MG1, MG3, MG4, MG5)
10 - MUVI 2 (MG7, MG2, MG6, MG11)
11 - MUVI 3 (MM1, MM2, MM3, MM4)
12 - MUVI 4 (MG9 90-deg MUST2)
13 - empty
14 - empty
15 - CATS2
16 - FINGER |
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Fixed, TEST, Wed Dec 4 19:19:38 2019, Marlčne, GRIT, Hardware, , Modifications of set-up
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We have installed the new MUFEE board in the reaction chamber for MG2. This board is a new version with ATHED.
We have moved the MG9 board to become the board to read the future MUST2 detector at 90 deg. This board is now perpendicular to the other ones. We have tested the kaptons connection to the detector and the placement of the detector.
The design will be refined on monday with Patrice.
The board that was reading MG10 is now used for MG6.
Every board has been tested again with pulser under vacuum. Everything seems OK. |
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Fixed, e744s, Thu Apr 11 02:12:42 2019, François, TARGET, General, , Measured target thicknesses
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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, e768s, Mon Jul 15 14:29:47 2019, Marlčne, MUST2, General, , Masks for MUST2 & Kapton changed for MG5 
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Masks are now correctly mounted
All 4 kaptons from MG5 have been changed |
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Fixed, e768s, Fri Jul 12 12:07:56 2019, mugast, OTHER, General, N/A, Masks for MUST2
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Masks for MUST2 are now mounted.
NOTE: one mask is not properly screwed (top left) and should be mounted again on Monday morning when we open.
Masks cover theta_lab < 38 deg, corresponding to < 30 pps of 15O for 15O+19F elastic channel assuming 2e7 pps of 15O and 1.25 mg/cm2 of LiF. |
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Fixed, com2019, Fri Apr 5 11:26:09 2019, Adrien, Freddy and the world, OFFLINE, General, N/A, Mask reconstruction CATS1-CATS2 run 223
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Mask between CATS1 and CATS2 in Z=-2190 Reconsctruction with nptool and attached mugast.detector and ConfigCATS.dat attached.
The beam seems to be shifted strongly to the [B]left[/B] of the beam line during the run. not clear yet if the shift of the mask is due to :
- shift of cats
- shift of the mask itself
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Fixed, com2019, Thu Apr 4 14:41:52 2019, Jenn, TARGET, General, N/A, Mask
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Image of the Mask position in the target frame. |
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Fixed, e793s, Wed Mar 3 17:18:42 2021, Franco, GRIT, General, N/A, MUVI's scheme and connections on the chamber
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Fixed, TEST, Mon Mar 4 14:34:31 2019, Valerian, Marlčne, Iulian, MUST2, General, N/A, MUST2 positions (based on e755)
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Based on experiment e755, the MUST2 config is the following :
T1, PCB10:
X128Y1.......X1
. .
. .
Y128.......
T2, PCB5:
Y128.......X128Y1
. .
. .
.......X1
T3, PCB4:
.......Y128
. .
. .
X1.......X128Y1
T4, PCB7:
X1.......
. .
. .
X128Y1.......Y128 |
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Fixed, e768s, Wed Jul 17 09:50:44 2019, mugast, MUST2, General, N/A, MUST2 CAEN alim burned down
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Yesterday at around 23h the CAEN alim stopped working.
- The 48V power supply is blown up
- The Main controller is still starting
- We can see all card from the powered crate so hopefully no damage on the card themselves
Nicolas left a 6am this morning to pickup a spare at Orsay.
In the mean time we run 15N with VAMOS-AGATA daq. |
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Fixed, e793s, Fri Jan 29 15:11:54 2021, Adrien, VACUUM, General, N/A, MUGAST undervacuum and powered up
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MUGAST is undervacuum thanks to Arnaud and Laurent.
I switch on all BT and HT. everything fine so far. Keeping the HV to check there is no trip on the silicon |
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Fixed, TEST, Tue Feb 2 16:41:17 2021, Franco, VACUUM, Hardware, N/A, MUGAST undervacuum and powered up
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I put back the supply of MM1 to the channel 1 of the MUST2 box (as in the normal configuration) and polarized the detectors to make a rapid re-check. I didn't see any detector tripping. MM1, switched on only for a couple of minutes, had a stable current at 1.3 uA. The stability of the detectors over time should anyway be checked better tomorrow leaving them polarized for a longer time.
| Adrien wrote: | MUGAST is undervacuum thanks to Arnaud and Laurent.
I switch on all BT and HT. everything fine so far. Keeping the HV to check there is no trip on the silicon |
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Fixed, e786s, Mon Jun 3 18:00:10 2019, Marlčne, GRIT, General, , MUGAST detectors status --> MG4T
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The problem of MG4T ha sbeen solved by changing the feedthrough.
The pulser on Y was not working and we were seeing no events (no ORD) because there was a problem with the bias of board. The issue is due to the feedthrough.
So now MG4T (HT &BT) are plugged in a free feedthrough (below MG1T) and I see pulser signals on Y.
The bias seems to apply normally on all detectors (in the dark).
The pulser is seen on each boards.
I have put back aluminium foil on square but I could not test it. |
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Fixed, e775s, Fri Feb 28 22:58:31 2020, Franck, Sylvain, ONLINE, General, CD2, MUGAST Spectra Run 153
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Run 153 (target #2 CD2+Au)
MUGAST Spectra reset at start of run (~ 20h) |
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Fixed, e775s, Thu Feb 27 19:29:24 2020, Chloé, Franck, ONLINE, General, CD2, MUGAST Spectra
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Fixed, e775s, Fri Feb 28 00:35:02 2020, Chloé, Franck, Michal, ONLINE, General, CD2, MUGAST Spectra
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Fixed, e793s, Fri Mar 12 09:55:30 2021, Franco, GRIT, General, CD2, MM5
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The first plot attached has been done by artificially removing 7 deg in theta lab, just to see if the the kinematic lines of 47K(d,d) and 47K(p,p) can be reproduced. Of course the energy losses are not optimized in this case but anyway the agreement seems nice.
In the second plot I moved MM5 forward (in z) by 17.5 mm, without any re-orientation in x and y. We should compare this position with the one measured by the surveyors.
It looks like we have plenty of protons in the target but actually the Rutherford cross section at 80 deg for (p,p) is 4 times higher than the (d,d) one. From a quick estimation the ratio 2H:1H in the target should be around 3:1 (to be checked!). |
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Fixed, TEST, Tue May 28 11:08:10 2019, mugast, MUST2, Hardware, 3-alpha, MG3 is tripping
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| MG3T is tripping, tryied to set max current to 20uA but it still trip around 30V. |
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Fixed, TEST, Fri Feb 14 10:49:22 2020, Marlčne & Franco, RUN, General, 3-alpha, MG11 issues
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We analyzed the behaviour of the annular. We realized that the 4-peaks behaviour on X was already present last year but only on one sector, now it's on two sectors. We noticed that there is a correlation between the malfunctioning sectors and the missing strips on Y. Last year there was only a missing strip on Y, affecting only one sector on X; now 3 strips are missing on Y, affecting 2 sectors on X. We believe that the fact that the boundings are missing have an impact on the grounding, therefore the sectors are not always biased properly, resulting in an oscillation of the pedestal. We estimate that this will cause a loss of efficiency of ~25% for the annular (from ~90% to ~67%).
| mugast wrote: | RUN 500
start: 11/02/2020 @ 19h00
stop: 12/02/2020 @ 10h00
alpha source test - cooling 14°C
Remarks:
- The two new detectors (MG2 and 6) seem functional;
- MG11 annular, ok for sectors (Y) but many rings have double peaks;
- MM1 current was oscillating yesterday evening with values around 3 uA, this morning it was stable at ~0.55 uA. |
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