| ID |
Date |
Author |
Category |
Subject |
Year |
|
567
|
Sun May 30 14:40:55 2021 |
Jan, Sophia | Detectors | real detector assignment | 2021 |
************************************
GEM1800 @ 90deg (xray1)
GLP2000 @ 35deg (xray2)
GEM3000 @ 145deg (xray3)
************************************
Was noted wrongly in most calib runs. |
|
568
|
Sun May 30 14:48:09 2021 |
Jan, Sophia | Calibration | run0215 - crap | 2021 |
|
|
569
|
Mon May 31 10:08:42 2021 |
Jan, Sophia | Runs | E127b runsheet | 2021 |
|
| Attachment 1: e127b_runsheet.ods
|
|
573
|
Wed Jun 23 12:29:35 2021 |
Jan, Sophia | Calibration | Efficiency of the x-ray Detectors | 2021 |
For the x-ray detectors, efficiencies have been measured, before and after the experiment was performed.
The preliminary results of the determined efficiencies can be seen in the attached plots |
| Attachment 1: Effizienz_x_ray_GEM1800_90.png
|
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| Attachment 2: Effizienz_x_ray_GEM3000_145.png
|
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| Attachment 3: Effizienz_x_ray_GLP_35_ohne33keV.png
|
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|
577
|
Wed Jul 14 14:46:05 2021 |
Jan, Sophia | Detectors | collimator geometry | 2021 |
We have measured the collimator geometry. The annotations of the variables can be found in the attached sketch
|
90° Detector GEM1800 | Distance[mm]
| |
A | 2.4
| |
B | 10.05
| |
C | 2.1
| |
D | 35.025
| |
145° Detector GEM3000 | Distance[mm]
| |
A | 2.15
| |
B | 10.05
| |
C | 5.025
| |
D | 35
| |
35° Detetektor GLP-2000 | Distance[mm]
| |
A | 2.1
| |
B | 10.05
| |
C | 0
| |
D | 13
|
|
| Attachment 1: 20210714_104111.jpg
|
|
| Attachment 2: 90Deg_Det..jpg
|
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| Attachment 3: 90Deg_Coll_top.jpg
|
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| Attachment 4: 90deg_coll_bot.jpg
|
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| Attachment 5: 145deg_Det.jpg
|
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| Attachment 6: 145Deg_coll_top.jpg
|
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| Attachment 7: 145deg_coll_bot.jpg
|
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| Attachment 8: 35Deg_Det.jpg
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| Attachment 9: 35deg_coll_top.jpg
|
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| Attachment 10: 35deg_coll_bot.jpg
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|
420
|
Mon May 24 15:24:52 2021 |
Jan, Laszlo, Piere-Michel, Enis | Runs | Run 0096 | 2021 |
No. of stacks: 10 (before 5)
length SC10: 2x 5.5s
bump ge01sq2f (sc10): -20 mm (before -10 mm)
open file : e127b_run0096.lmd
beam: 118Te52+
energy: 7 MeV/u
cooler voltage:
purpose:
Fragment beam measurement (beating the record of rad. beam pg-measurement)
Detector position (Si): -25 mm
GE01DD1IG position (Scraper): +3.5 mm (20mm away from beam)
run start: 15:24:51 24.05.2021
run stop: 15:51:56 24.05.2021 (stopped early, due to radiation alarm)
_______________________________________________________________________________
ON Rates
Si_ON_bdt: ~0 Hz
Xray_ON_bdt: 75 Hz
BaF_OR: ---
Si voltage: 100.0 V
Si leakage current: 410 uA
SIS particles before: 7.6e8
ESR current at injection: 2e6 (stacked)
ESR particles after decel.: 4e6
Target ON density: 1.0e14 |
|
421
|
Mon May 24 16:06:39 2021 |
Jan, Laszlo, Piere-Michel, Enis | Runs | Run 0097 | 2021 |
Changed trafo offset during this file !!
No. of stacks: 10 (before 5)
length SC10: 2x 5.5s
bump ge01sq2f (sc10): -20 mm (before -10 mm)
open file : e127b_run0097.lmd
beam: 118Te52+
energy: 7 MeV/u
cooler voltage:
purpose:
Fragment beam measurement (beating the record of rad. beam pg-measurement)
Detector position (Si): -25 mm
GE01DD1IG position (Scraper): +3.5 mm (20mm away from beam)
run start: 16:05:44 24.05.2021
run stop: 17:22:36 24.05.2021
_______________________________________________________________________________
ON Rates
Si_ON_bdt: ~0 Hz
Xray_ON_bdt: 75 Hz
BaF_OR: ---
Si voltage: 100.0 V
Si leakage current: 410 uA
SIS particles before: 1.3e8
ESR current at injection: 1.3e6 (stacked)
ESR particles after decel.: 4e6
Target ON density: 1.0e14 |
|
357
|
Thu May 20 17:31:50 2021 |
Jan, Laszlo, Beatriz | General | beam & target alignement | 2021 |
beam and target alignement was checked by looking at the Xray rates. Best case when:
Target bump (position) SC 9: -18.5mm
(We were aiming to keep the particles in the beam at a const. level when target switched ON)
pos bdt
-21 800
-20 1000
-19 1300
-18 1300
-17 1000
-16 500 |
|
25
|
Wed Oct 23 14:51:43 2019 |
Jan, Laszlo | DAQ | VME modules & main.cfg | |
Here is the current list of VME modules in our DRASI daq including HW addresses:
Slot <module> [HW addr.]
1 <RIO4>
2 <Vulom4b> [0500]
3 <ENV3>
5 <scaler V830> [00E1]
7 <scaler V830> [00E2]
15 <TDC V775> [00C1]
17 <TDC V775> [00C2]
19 <MADC> [00A1]
21 <MADC> [00A2]
See also main.cfg attached |
| Attachment 1: main.cfg
|
CRATE("Master")
{
GSI_VULOM(0x05000000) {
trlo2_master = true
}
MESYTEC_MADC32(0x00A10000) {
nim_busy = gate0
range = 10 V
resolution=8
hires=true
}
BARRIER
MESYTEC_MADC32(0x00A20000) {
nim_busy = gate0
range = 10 V
resolution=8
hires=true
}
BARRIER
CAEN_V775 (0x00C10000) {
common_start = false
time_range = 1200 ns
suppress_invalid = true
suppress_over_range = true
}
BARRIER
CAEN_V775 (0x00C20000) {
common_start = false
time_range = 1200 ns
suppress_invalid = true
suppress_over_range = true
}
BARRIER
CAEN_V830 (0x00E10000) {
resolution = 32
}
BARRIER
CAEN_V830 (0x00E20000) {
resolution = 32
}
}
|
|
28
|
Wed Nov 6 14:13:53 2019 |
Jan, Laszlo | Detectors | DSSSD - 1st movement - realignment | |
We moved the new detector installation for the first time slowly into the dipole chamber.
The alignement seems to be pefect, no distortion or vertical movement of the detector-arm was observed from the window flange.
The vacuum on the detector side went up from 2e-10 mbar to about 5e-9 mbar.
On the ring side it was 3e-11 mbar befor and 1e-10 mbar after movement.
The extreme positions possible (Endlage) are:
max out: -10613
max in: -7
These are the absolute positions in units of 0.1 mm
It has to be noted that after bakeout a realignment of the detector was needed in order to have it centered in vertical dimension. However, this realignment has been only slight turns of the base flange alignment screws. In detail, the two inner "Sechskantschrauben" below the bellow have been loosed slightly, while the outer two have been tightend. Additionally, the small "Madenschraube" on the outside has been loosend by 1/4 turn.
In result the detector could be raised in vertical position by about ~5mm (jugded by eye).
The effect of small turning on the screws is extreme on the detector position! Be careful when re-adjusting. |
|
30
|
Thu Dec 5 10:57:57 2019 |
Jan, Laszlo | Detectors | setting up the DSSD with beam | |
This is a brief how-to about getting the DSSSD set up with stored beam and target in the ESR.
The main goals
1. adjust timing signals to TDC-range
2. adjust energy signals to ADC-range
3. optimize energy resolution
The signal chain is the following:
det [32ch.] > preamp [2x16ch] > 2x MSCF shapers [16ch] |
|
83
|
Fri Mar 20 13:21:33 2020 |
Jan, Laszlo | Analysis | 124Xe data of first night | |
The unpacked data of all runs from the first night (46-50) is located at
litv-exp@lxg0188:/data.local2/E127_lmd/124Xe_1st_night.root
By taking a very quick look at the Silicon xy position histo, one can identify (please not the number of counts) clusters of hits. The x=0 and x=1 strips sees the forward scattering Rutherford particles, which remained even after scraping at 3.5cm away from the beam. This idea is supported by the simulations. Backscattered Rutherford components cannot be identified simply because of their low count rate (the exact rate should be double check). The second cluster in the middle of the detector must be our pg peak. For x>=7 strip we see the pn channel. It overlaps with the pg peak both in the position and in the energy. The energy vs Xstrip histo is NOT gainmatched, yet. Hard to make statements, but so far it seem to support the conclusions based on the position histo. The energies seem to corrsepond to the simulation: forward Rutherford, pg at same level; pn is a bit below ( ~.8% energy separation of the centers). The separation in the enregy for the backscattered Rutherford should be in the range of 2%. |
| Attachment 1: 90_deg.png
|
|
| Attachment 2: 35_deg.png
|
|
| Attachment 3: 145_deg.png
|
|
| Attachment 4: image3063.png
|
|
| Attachment 5: image4019.png
|
|
|
498
|
Thu May 27 14:33:05 2021 |
Jan, Beatriz, Alex | Runs | Run 0154 - crap run | 2021 |
No. of stacks: 10
length SC10: 2x 5.5s
bump ge01sq2f (sc10): -20 mm
bump target (sc10): -12.8 mm
open file : e127b_run0154.lmd
beam: 118Te52+
energy: 6 MeV/u
cooler voltage:
purpose:
Fragment beam measurement (beating the record of rad. beam pg-measurement)
Detector position (Si): -25 mm
GE01DD1IG position (Scraper): +2.0 mm
run start: 14:32:05 27.05.2021
run stop: 27.05.2021
_______________________________________________________________________________
ON Rates
Si_ON_bdt: ~ 3 Hz
Xray_ON_bdt: 90 Hz
BaF_OR: ---
Si voltage: 100.0 V
Si leakage current: 380 nA
SIS particles before: 2.5e9 (one shoot)
ESR current at injection: 2.0e6 (stacked)
ESR particles after decel.: Unreadable
Target ON density: 1.0e14 |
|
1
|
Thu Sep 13 11:42:33 2018 |
Jan Glorius | Collaboration | Proposal | |
| Attached is the beam time proposal submitted and accepted by the G-PAC in 2017. |
| Attachment 1: E127_Reifarth_pg.pdf
|
|
| Attachment 2: E127_Approval.pdf
|
|
|
293
|
Thu Apr 29 20:32:52 2021 |
Jan Glorius | Calibration | calibration sources | 2021 |
We use the following list of sources for calibration of the Xray detectors:
- 210Pb [40.1 kBq (4%), 01.10.2020 12:00 UTC] SpecSheet
- 241Am_low [40.5 kBq (3%), 01.10.2020 12:00 UTC] SpecSheet
- 241Am_high [389 kBq (3%), 01.10.2020 12:00 UTC] SpecSheet
- 133Ba_low [40.8 kBq (3%), 01.10.2020 12:00 UTC] SpecSheet
- 133Ba_high [404 kBq (3%), 01.10.2020 12:00 UTC] SpecSheet |
|
294
|
Thu Apr 29 20:34:09 2021 |
Jan Glorius | Calibration | run0003 - Xray90 calib Pb210 d=167.5mm | 2021 |
Efficiency calibration in the lab
Detector: GEM1800 - 90 deg
Source: 210Pb
Distance: 167.5mm
Start time: 20:39:54 - 29.04.2021
Stop time: 08:43:58 - 30.04.2021
file name: e127b_run0003.lmd
avrg. rate: 70Hz
dead-time: 1%
Rate spikes every ~2-3 sec. Need to be checked! |
|
295
|
Fri Apr 30 09:27:27 2021 |
Jan Glorius | Calibration | run0004 - Xray90 calib Pb210 d=167.5mm | 2021 |
Efficiency calibration in the lab
Detector: GEM1800 - 90 deg
Source: 210Pb
Distance: 167.5mm
Start time: 9:26:58 - 30.04.2021
Stop time: 9:33:22 - 30.04.2021
file name: e127b_run0004.lmd
avrg. rate: 50Hz
dead-time: 1%
Still rate peaks, further investigations. |
|
296
|
Fri Apr 30 09:57:57 2021 |
Jan Glorius | Calibration | run0005 - Xray90 calib Pb210 d=167.5mm | 2021 |
Efficiency calibration in the lab
Detector: GEM1800 - 90 deg
Source: 210Pb
Distance: 167.5mm
Start time: 9:58:00 - 30.04.2021
Stop time: 10:01:09 - 30.04.2021
file name: e127b_run0005.lmd
avrg. rate: 50Hz
dead-time: 1%
Still rate peaks, probably the ESR kicker or some other external influence.
So we have double triggers occasionally. This might slightly affect deadtime determination. |
|
297
|
Fri Apr 30 10:55:34 2021 |
Jan Glorius | DAQ | Xray multi-triggers - blocking gate | 2021 |
From the CFD of Xray1 (90deg) we get multiple trigger signals every ~5sec for unknown reasons.
No hint from the preamp signals.
The solution now is to have an extended blocking gate active in the trlo-config of node 2.
There is now a trigger_stretch of 2500ns for all Xray triggers:
trig_stretch(1) = 2500ns;
trig_stretch(2) = 2500ns;
trig_stretch(3) = 2500ns;
This prevents the multiple triggers to reach the lmu (before_dt scalers)
However, this will also lead to a very small loss of good signal triggers that overlay within 2.5 us.
This has to be taken into account for deadtime determination. |
|
298
|
Fri Apr 30 11:04:31 2021 |
Jan Glorius | Calibration | run0006 - Xray90 calib Pb210 d=167.5mm | 2021 |
Efficiency calibration in the lab
Detector: GEM1800 - 90 deg
Source: 210Pb
Distance: 167.5mm
Start time: 11:04:03 - 30.04.2021
Stop time: 11:53:59 - 30.04.2021
file name: e127b_run0006.lmd
avrg. rate: 50Hz
dead-time: 1%
Now with blocking gate to get rid of multiple triggers.
Dead time determination using: adt/bdt
Threshold at ~20keV
Last seconds of run may not be usable: DAQ node2 has been deactivated shortly by mistake. |