 Mon Apr 6 04:39:19 2020, Laszlo, Calibration, 2. Xray energy calibration, 9x
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30angle: E[keV] = 0.015898 *ch-1.91
90angle: E[keV] = 0.0211075*ch-2.39
145angle: E[keV] = 0.01663 *ch-1.758 |
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Sun Apr 5 20:34:42 2020, Laszlo, Calibration, Xray energies - 1. calibration, 8x
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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 |
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Thu Mar 26 12:05:22 2020, Laszlo, Calibration, measurement of collimators,
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The measurements were taken by using a caliper ruler, with precision of +/-0.05mm |
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Wed Mar 25 15:06:09 2020, Laszlo, Analysis, quick summary of the run numbers,
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Wed Mar 25 14:26:22 2020, Laszlo, Calibration, run111 - Xray90 calib Am241, distance 167.5mm - LESS NOISE,
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Detector: 90
Source: 241Am
Distance: 167.5mm
.Start time: ? 23.03.2020
Stop time:
file name: run111_xxxx.lmd
avrg. rate: 444Hz
dead-time: 5%
Uwe reduced the noise on the 90 degree detector (see elog entry) |
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Tue Mar 24 10:59:18 2020, Jan, Calibration, Sources - Specifications,
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We used the following sources:
Am241 (OM666) [GSI - Uwe]
Reference Activity: 430 kBq
Uncertainty: 3%
Reference Date: 19.09.2006
Ba133 hi (AN-5868) [GSI - Kozuharov]
Reference Activity: 438 kBq
Uncertainty: 3%
Reference Date: 01.06.2019
Ba133 low (OL 918) [GSI - Angela]
Reference Activity: 39.7 kBq
Uncertainty: 3%
Reference Date: 08.09.2006
Pb210 (2015-1552) [GUF - Rene]
Reference Activity: 7.42 (15) kBq
Uncertainty: 0.15/7.42 = 2%
Reference Date: 01.01.2016 |
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Tue Mar 24 10:20:26 2020, Laszlo, Calibration, Pictures of the xray calibration,
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Tue Mar 24 00:11:35 2020, Laszlo, Calibration, run116 - Xray35 calib AM241, distance 334mm,
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Detector: 35
Source: 241Am
Distance: 334mm
Start time: 00:11:03 24.03.2020
Stop time: 10:01:4224.03.2020
file name: run116_xxxx.lmd
avrg. rate: 20Hz
dead-time: 0% |
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Mon Mar 23 22:25:41 2020, Laszlo, Calibration, run115 - Xray35 Ba133 d=334mm, Xray90 Lead source, d=167.5mm,
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Simultaneous measurement of Xray35 and Xray90. The dead-time is <3%
Detector: 35
Source: 133Ba - strong source
Distance: 334mm
Detector: 90
Source: Lead source
Distance: 167.5mm: the lead source was measured 3mm width with the source in the middle. Therefore, I set the paper zylinder to ~169mm distance.
Start time: 22:25:22 23.03.2020
Stop time: 00:04:49 24.03.2020
file name: run115_xxxx.lmd
avrg. rate35: 75Hz
avrg. rate90: 55Hz
dead-time: 2%
Uwe reduced the noise on the 145 degree detector as well.
During measurement the oscilloscope remained connected! |
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Mon Mar 23 21:47:40 2020, Laszlo, Calibration, run114 - Xray145 calib Ba133, distance 305mm - LESS NOISE,
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Detector: 145
Source: 133Ba - strong source
Distance: 305mm
Start time: 21:47:20 23.03.2020
Stop time: 22:04:06 23.03.2020
file name: run114_xxxx.lmd
avrg. rate: 950Hz
dead-time: 11%
Uwe reduced the noise on the 145 degree detector as well.
During measurement the oscilloscope remained connected! |
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Mon Mar 23 20:52:37 2020, Laszlo, Calibration, run113 - Xray145 calib Am241, distance 305mm - LESS NOISE,
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Detector: 145
Source: 241Am
Distance: 305mm
Start time: 20:01:43 23.03.2020
Stop time: 21:43:34
file name: run113_xxxx.lmd
avrg. rate: 220Hz
dead-time: 2.5%
Uwe reduced the noise on the 145 degree detector as well. |
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Mon Mar 23 19:32:53 2020, Laszlo, Calibration, run112 - Xray90 calib Am241, distance 200mm - LESS NOISE,
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Detector: 90
Source: 241Am
Distance: 200mm
Start time: 20:01:43 23.03.2020
Stop time:
file name: run112_xxxx.lmd
avrg. rate: 444Hz
dead-time: 5%
Uwe reduced the noise on the 90 degree detector (see elog entry) |
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Mon Mar 23 18:17:27 2020, Laszlo, Calibration, run110 - Xray90 calib Ba133, distance 167.5mm -low rate - LESS NOISE,
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Detector: 90
Source: Ba133 - weak source
Distance: 167.5mm
Start time: 18:14:50 23.03.2020
Stop time:
file name: run110_xxxx.lmd
avrg. rate: 160Hz
dead-time: 2%
Uwe reduced the noise on the 90 degree detector (see previous elog entry) |
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Mon Mar 23 18:15:55 2020, Laszlo, General, noisy 90degree Xray det,
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Uwe found out, that there was some common ground effect between 90 and 145 degree detectors. after moving the grounds, we could record much more nicer (Gaus
shaped) peaks in the spectra. Now we continue with this settings |
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Mon Mar 23 17:40:33 2020, Laszlo, Calibration, run109 - Xray90 calib Ba133, distance 167.5mm -low rate,
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Detector: 90
Source: Ba133 - weak source
Distance: 167.5mm
Start time: 17:40:11 23.03.2020
Stop time:
file name: run109_xxxx.lmd
avrg. rate: 170Hz
dead-time: 2% |
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Mon Mar 23 17:32:42 2020, Laszlo, Calibration, run108 - Xray90 calib Ba133, distance 167.5mm - high rate - deadtime too high!,
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Detector: 90
Source: Ba133 - strong source
Distance: 167.5mm
Start time: 17:32:11 23.03.2020
Stop time: 17:35:34
file name: run108_xxxx.lmd
avrg. rate: 2.7kHz
dead-time: 26% |
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Mon Mar 23 16:21:33 2020, Laszlo, Calibration, run107 - Xray90 calib Am241, distance 167.5mm,
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Detector: 90
Source: Am241
Distance: 167.5mm
Start time: 15:46:49 23.03.2020
Stop time: 17:32 23.03.2020
file name: run107_xxxx.lmd
avrg. rate: 610Hz
dead-time: 7%
not Gaussian shaped peaks, after previous investigations with the scope, the scope is disconnected.
Just to mention, in order to improve deadtime the other two Xray dets are disconnected. |
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Mon Mar 23 16:17:58 2020, Laszlo, Calibration, run106 - garbage!,
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run106 was clicked by accident, please delete! |
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Mon Mar 23 15:48:15 2020, Laszlo, Calibration, run105 - Xray90 calib Am241, distance 167.5mm, wrong?,
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Detector: 90
Source: Am241
Distance: 167.5mm
Start time: 15:46:49 23.03.2020
Stop time:
file name: run105_xxxx.lmd
avrg. rate: 610Hz
dead-time: 7.5%
suspiciously not Gaussian shaped peaks --> investigation with oscilloscope |
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Mon Mar 23 14:32:03 2020, Jan, Analysis, runs_100to104 NO-SCRAPER RESULTS,
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Without scraper, we have very few (p,g) counts, hard to get numbers quickly, maybe ~50.
X-rays look fine! |