ID |
Date |
Author |
Category |
Subject |
Year |
358
|
Thu May 20 18:11:24 2021 |
Laszlo | General | Touching the beam with Dsssd - current change | 2021 |
|
Attachment 1: IMG_20210520_180857.jpg
|
|
448
|
Tue May 25 15:56:48 2021 |
Robert/Shahab | Accelerator | Trafo | 2021 |
Trafo was set to 0 |
292
|
Wed Apr 28 09:12:47 2021 |
Jan, Yuri | Detectors | UI-diagram | 2021 |
The UI-curve of the detector
U I
10 0.11
20 0.13
30 0.15
40 0.17
50 0.19
60 0.21
70 0.22
80 0.23
90 0.25
100 0.27
110 0.29
120 0.31
130 0.33
140 0.35
150 0.37 |
Attachment 1: UI_meas_curve.pdf
|
|
574
|
Thu Jun 24 09:43:01 2021 |
Jan Glorius | DAQ | Unpacker | 2021 |
The unpacker used for the production runs of E127b is located at
/u/litv-exp/unpacker/unpackexps/e127_TO_2021_with_ECL
It is also aliased for litv-exp user as: E127_unpack
This is for the data structure as documented here:
https://elog.gsi.de/esr/E127/346
As of now, this is compiled for ROOT v6-18-04 located here:
/cvmfs/csee.gsi.de/root/618-04/bin/root |
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
}
}
|
359
|
Thu May 20 18:13:55 2021 |
Laszlo | General | Vacuum change while Si movement | 2021 |
The vacuum remained in the E-10 range after moving the dsssd. The oscillation in the vacuum.values are due to the
magnets ramping up and down |
Attachment 1: IMG_20210520_174632.jpg
|
|
183
|
Sun Mar 22 12:01:44 2020 |
Esther, Ragan | General | Vacuum problem with SIS | |
There is some problem with the vacuum in SIS and thus data recording is stopped. |
91
|
Fri Mar 20 23:43:26 2020 |
Laszlo | General | Vacuum while moving in the detector at yesterday evening | |
Vacuum before DSSSD movement: 1.5844E-11
Top value after movement: 3.64378E-11
This oscillating effect is due to magnets? |
Attachment 1: DSSSD_moving_vacuum_change.JPG
|
|
Attachment 2: IMG_20200320_021131.jpg
|
|
92
|
Sat Mar 21 01:25:07 2020 |
Laszlo | General | Vacuum while moving in the detector for fragment measurement | |
Stayed below E-10
Start:2.42E-11
Top after moving: 4.144E-11 |
Attachment 1: DSSSD_moving_vacuum_change1.JPG
|
|
397
|
Sat May 22 21:33:22 2021 |
Laszlo | Detectors | Xray detectors are filled at 90 and 35 | 2021 |
|
270
|
Sun Apr 5 20:34:42 2020 |
Laszlo | Calibration | Xray energies - 1. calibration | |
30angle: E[keV] = 0.0158507 *ch-2.07456
90angle: E[keV] = 0.01950*ch-2.76
145angle: E[keV] = 0.017988 *ch-1.809
I could identify 2 peaks in the 241Am spectra and 4 peaks in the 133Ba. These peaks are fitted with a gaussian to get their position --> linear energy calibration for the combined (Am+Ba) data sets for each detector. The function I used: E(ch) [keV] = m*ch+b |
Attachment 1: 90angle_Xray_first_calibration.png
|
|
Attachment 2: 30angle_Xray_first_calibration.png
|
|
Attachment 3: 145angle_Xray_first_calibration.png
|
|
Attachment 4: 90_det_calib_Am_Ba.cal
|
#gaus fit, gaus fit error, literature (nndc), literature error
#literature used:
#https://www.nndc.bnl.gov/nudat2/decaysearchdirect.jsp?nuc=241AM&unc=nds
#https://www.nndc.bnl.gov/nudat2/decaysearchdirect.jsp?nuc=133BA&unc=nds
#where there is no error given, I put +/-.5 to the last digit
1493.31 0.26 26.3446 0.0002
3194.81 0.053 59.5409 0.0001
1721.92 0.0574 30.973 0.0005
1937.28 0.163 34.987 0.0005
2864.67 0.443 53.1622 0.0006
4292.25 0.122 80.9979 0.0011
|
Attachment 5: 30_det_calib_Am_Ba.cal
|
#gaus fit, gaus fit error, literature (nndc), literature error
#literature used:
#https://www.nndc.bnl.gov/nudat2/decaysearchdirect.jsp?nuc=241AM&unc=nds
#https://www.nndc.bnl.gov/nudat2/decaysearchdirect.jsp?nuc=133BA&unc=nds
#where there is no error given, I put +/-.5 to the last digit
1.79319e+03 3.88460e-01 26.3446 0.0002
3.88726e+03 1.00448e-01 59.5409 0.0001
2.08381e+03 5.25334e-02 30.973 0.0005
2.33719e+03 3.17859e-02 34.987 0.0005
3.48482e+03 1.03952e-01 53.1622 0.0006
5.24059e+03 2.54968e-02 80.9979 0.0011
|
Attachment 6: 145_det_calib_Am_Ba.cal
|
#gaus fit, gaus fit error, literature (nndc), literature error
#literature used:
#https://www.nndc.bnl.gov/nudat2/decaysearchdirect.jsp?nuc=241AM&unc=nds
#https://www.nndc.bnl.gov/nudat2/decaysearchdirect.jsp?nuc=133BA&unc=nds
#where there is no error given, I put +/-.5 to the last digit
1.56549e+03 1.83848e-01 26.3446 0.0002
3.41036e+03 4.20525e-02 59.5409 0.0001
1.81904e+03 3.15736e-02 30.973 0.0005
2.04758e+03 8.68290e-02 34.987 0.0005
3.06014e+03 1.98896e-01 53.1622 0.0006
4.61345e+03 5.23412e-02 80.9979 0.0011
|
Attachment 7: run041_133Ba_high_90.svg
|
|
Attachment 8: run040_241Am_90.svg
|
|
87
|
Fri Mar 20 19:37:43 2020 |
Jan | Calibration | Xray energies - rough 1. calibration | |
-- E calibration seems to have changed! ---
This calibration is based on the source data taken before the experiment:
Xray1: E [keV] = ch*0.01582-1.963
Xray2: E [keV] = ch*0.01799-1.803
Xray3: E [keV] = ch*0.01941-2.618 |
305
|
Mon May 3 14:55:44 2021 |
Jan Glorius | Calibration | Xray energy calib. table | 2021 |
Here is the table of energy calibration lines from Am241 for all Xray detectors for several measurements.
Also the linear fit parameters [ E(ch) = A*ch + B ] are given at the bottom of the table.
E [keV] | xray90 (GEM1800) | xray35 (GLP) | xray145 (GEM3000)
|
| lab (28.04.21) | lab (04.05.21) | lab (11.05.21)
|
59.54 | 2402.45 ch | 2399.07 ch | 2423.24 ch
|
26.34 | 1107.38 ch | 1116.65 ch | 1127.94 ch
|
13.95 | 624.33 ch | 638.38 ch | 645.39 ch
|
|
slope A | 0.0256387 keV/ch | 0.0258923 keV/ch | 0.0256408 keV/ch
|
offset B | -2.05477 keV | -2.57638 keV | -2.59114 keV
|
|
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. |
344
|
Sun May 16 11:54:12 2021 |
Jan Glorius | Calibration | Xray performance in lab | 2021 |
These are the current Xray detector performances in the lab using data from run0046
det | DAQ ch | threshold | resolution @ 60keV
|
GEM1800 | xray1 | 5keV | 495eV
|
GLP2000 | xray2 | 5keV | 430eV
|
GEM3000 | xray3 | 7keV | 525eV
|
|
307
|
Tue May 4 14:34:51 2021 |
Jan Glorius | Detectors | Xray weight control induces signals | 2021 |
When the readout/control of the det. weight control via serial connection is active, there is a clear signal induced in the Xray detectors for each command sent.
The solution for now is, that we activate weight control NOT DURING MEASUREMENT! |
86
|
Fri Mar 20 16:58:02 2020 |
Jan | DAQ | Xray2 & Xray3 cabling | |
We found that Xray2 and Xray3 the cabling is not consistent:
90 degree detector
> E_Xray2 for energy
> t_Xray3 for times
145 degree detector
> E_Xray3 for energy
> t_Xray2 for timing
35 degree detector
> E_Xray1
> t_Xray1
We can run like this, but should be aware of it! |
469
|
Wed May 26 14:28:23 2021 |
Jan | Analysis | Xrays from 118Te & 124Xe | 2021 |
Attached is a plot of the uncalibrated energy spectra taken with the 90 degree xray detector for 118Te (red) and 124Xe (blue).
Shown is the region covering the K-alpha and K-REC peaks.
Calculating the ratios (Te/Xe) for K_alpha and K-REC energies from theory one gets:
K_alpha (theory): 0.9236
K-REC (theory): 0.9308
Without energy calibration we get the following ratio (using channel numbers):
K_alpha (exp): 0.9293
K-REC (exp): 0.9344
Taking into account that the channel numbers are not calibrated, the agreement is still very good.
In summary we can be sure that we have 118Te stored at 7AMeV. |
Attachment 1: xray90_124Xe_118Te.png
|
|
204
|
Sun Mar 22 19:49:12 2020 |
Michael, Laszlo, Yuri | | Yuri is still tuning FRS | |
We filled the Xray detectors.
Yuri is sill tuning FRS for primary beam. |
227
|
Mon Mar 23 07:56:51 2020 |
Laszlo | General | Yuri made magick and we operate again | |
DSSSD was moved out (HV switched off)
also the scraper was mistakenly moved.
Now we move everything back to its original position
We leave the scraper still in the "scraping position" in order to collect more data.
Soon we should switch to "without sctraper mode" |