 Fri Apr 30 09:57:57 2021, Jan Glorius, Calibration, run0005 - Xray90 calib Pb210 d=167.5mm , 2021
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Efficiency calibration in the lab
Detector: GEM1800 - 90 deg
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Fri Apr 30 09:27:27 2021, Jan Glorius, Calibration, run0004 - Xray90 calib Pb210 d=167.5mm , 2021
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Efficiency calibration in the lab
Detector: GEM1800 - 90 deg
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Thu Apr 29 20:34:09 2021, Jan Glorius, Calibration, run0003 - Xray90 calib Pb210 d=167.5mm, 2021
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Efficiency calibration in the lab
Detector: GEM1800 - 90 deg
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Thu Apr 29 20:32:52 2021, Jan Glorius, Calibration, calibration sources, 2021
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We use the following list of sources for calibration of the Xray detectors:
- 210Pb [40.1 kBq (4%), 01.10.2020 12:00 UTC] [URL=https://elog.gsi.de/esr/X-Ray+Lab/201006_131944/20-006_210Pb_40kBq.pdf]SpecSheet[/URL]
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Wed Apr 28 09:12:47 2021, Jan, Yuri, Detectors, UI-diagram, 2021 
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The UI-curve of the detector
U I
10 0.11
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Thu Apr 22 10:56:20 2021, Jan, Detectors, target-chamber det. distances, 2021
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This is the lookup table for the distance of each x-ray detector to the target.
See attached foto for explanation.
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Wed Apr 14 09:42:50 2021, Jan, Detectors, BaF HV gain matching, 2021
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The preliminary gain matching settings for a full ADC range of ~12MeV:
[TABLE border="1"]
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Wed Mar 31 13:57:27 2021, Jan, Detectors, BaF HV settings, 2021
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The setting below is a start value for final gain matching with a full ADC range of 12MeV:
[TABLE border="1"]
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Wed Mar 31 13:52:04 2021, Jan, Detectors, BaF Na22 Testing, 2021
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On 30. and 31.03.2021 we did some testing with the 6 BaF detectors.
Trigger & threshold:
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Tue Feb 2 13:59:00 2021, Jan, Detectors, DSSD installation and alignment, 2021
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The DSSD has been exchanged and aligned in
November 2020. After bakeout at 140°C
(externally, 120°C at internal temp. Sensor)
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Tue Nov 24 15:35:49 2020, Jan, Calibration, DSSD X/Y channel mapping, 2021
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During the detector test [URL=https://elog.gsi.de/esr/E127/284]test measurements[/URL] with alpha source the allocation of the 16 X- and 16 Y-channels has
been checked.
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Fri Oct 23 12:58:12 2020, Jan, Detectors, Test of 2nd DSSSD (gen2), 2021
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This is the documentation of the source tests with the 2nd micron DSSSD of 2nd generation (label 3288-17, thickness 529um)
The detector is put into vacuum (~5e-6 mbar) in our test chamber. The source is positioned a few cm above (see fotos).
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 Fri Nov 20 15:53:37 2020, Jan, Analysis, Test of 2nd DSSSD (gen2), 2021
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Here is the analysis of the test runs with the 2nd DSSD (gen2) using the quick_si_plots.c script attached.
All 32 Si channels are working with acceptable performance.
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Fri Jun 5 14:06:15 2020, Laszlo, Detectors, DSSSD and SCRAPER position estimate for Xe and Te experiments, 2020
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We don't know the exact absolute positions of the detector (+scraper) and the beam. However, what we have to know is only these two relative positions respect
to each other. To get this distance I use two methods:
1, combining the infos from the set position during the beamtime + the measured pg peak position on the detector. The pg peak position is defined only |
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Tue May 19 16:48:15 2020, Laszlo, General, E127 beamtime overview,
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Here is a representation how was the time management during E127. The time, what we could spend with measuring the 118Te(pg), was ~20% comparing to the
given 6days. |
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Wed Apr 29 16:06:28 2020, Laszlo, Calibration, efficiency fit - 90degree, combined dataset,
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For the efficiency vs E fit of the 90degree Xray detector I have used the following phenomenological funciton:
f(x) = a * (1-exp(-(x-c)/b)) * exp(-x/d)
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Thu Apr 30 17:40:57 2020, Laszlo, Calibration, efficiency fits,
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For all 3 detector the calibration data sets were combined to include the systematics in the fit results directly. Combining means not a weighted average,
just simple all data points were included into the fit --> doubled efficiency value for most of the energies.
The g(x) = a * (1-exp(-(x-c)/b)) * exp(-x/d) function was used to describe the behavior of the Germanium detectors for the whole range of energies (global |
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Thu Apr 30 22:55:45 2020, Laszlo, Calibration, inverse square law test,
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I have made also the inverse square law fits. We have data only for 90degre with the 241Am source, but both for the 1. and 2. calibrations. The 1. and 2.
calibration data sets treated separate.
2 peaks were investigated, 59.5keV and 26.3keV, at two distances 184.8mm and 217.3mm. These distances are the sum of 4 distances:
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Wed May 6 23:02:42 2020, Laszlo, Calibration, efficiency values,
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I have calculated the efficiency values by putting the energies of the K-REC peaks into the phenomenological (empirical) function and into the linear function
(see below). The K-REC peak's position I got from a Gaussian-fit on the peak. There are 5 data sets in total:
With 1. E-calibration parameters:
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Thu Apr 23 19:09:58 2020, Laszlo, Calibration, theoretical K-REC cross sections , 9x
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Find attached Andrey Surzhykov's calculations for the theta angle in respect to the beam direction (in lab. frame) vs. cross section for 124Xe54+ and 118Te52+.
The calculations made for collision with two H atoms with the accuracy of 1%. There are no molecular corrections done, but these corrections are within
1%.
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Tue Apr 21 22:25:00 2020, Jan, Analysis, ,
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Wed Apr 8 23:02:24 2020, Laszlo, General, lmd to measurement pairing list,
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I use the following list of lmd files combined to a single root file for each measurement.
It is very important to highlight that sometimes the trigger==1 data got corrupted,massive number of trigger==2 like events appear on the detector as trigger==1
signal, because the gas jet target didn't switch off after its normal phase (gas jet remains ON during injection. Maybe some gas jet issue, maybe some |
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Wed Apr 8 20:06:10 2020, Laszlo, Calibration, Counts in the K-REC peaks,
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3 datasets were investigated:
-124Xe with Scraper (2. Xray calibration parameters needed)
-124Xe without Scraper (2. Xray calibration parameters needed)
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Mon Apr 6 23:00:51 2020, Laszlo, Calibration, beam energies for 124Xe and 118Te measurements,
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"The e- cooler settings were the same for the 124Xe and 118Te beams" - Sergey --> speed of the ions is the same --> same MeV/u
E_beam = 10.0606MeV/u
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