 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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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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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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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 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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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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Fri May 21 10:00:51 2021, Jan, Accelerator, target bump, 2021
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The target overlap was optimized on xray and si rates.
The setting now is -10mm in SC9 |
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Fri May 21 11:55:24 2021, Jan, Detectors, SI MSCF settings v1, 2021
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attached are the settings for all MSCFs.
Settings are optimized for DSSD only, not BaF! |
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Fri May 21 12:21:57 2021, Jan, Runs, Run 0053, 2021
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open file : e127b_run0053.lmd
beam: 124Xe54+
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Fri May 21 14:06:23 2021, Jan, Runs, Run 0054, 2021
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open file : e127b_run0054.lmd
beam: 124Xe54+
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Fri May 21 15:15:59 2021, Jan, Runs, Run 0055, 2021
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open file : e127b_run0055.lmd
beam: 124Xe54+
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Fri May 21 19:36:46 2021, Jan, Runs, Run 0056, 2021
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open file : e127b_run0056.lmd
beam: 124Xe54+
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Fri May 21 20:09:00 2021, Jan, Runs, Run 0057, 2021
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open file : e127b_run0057.lmd
beam: 124Xe54+
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Fri May 21 21:02:53 2021, Jan, Runs, Run 0058, 2021
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open file : e127b_run0058.lmd
beam: 124Xe54+
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Sun May 23 23:44:37 2021, Jan, Runs, Run 0088 - background BaF/Xray, 2021
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open file : e127b_run0088.lmd
no beam
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Tue May 25 07:51:48 2021, Jan, Accelerator, ESR stacking cycle length, 2021
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The full cycle length of ESR with 30 stacks is about 7:45 minutes, out of which 15.5 sec are with target switched ON.
This is without CMB/HTD in parallel. |
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Tue May 25 08:36:15 2021, Jan, General, lessons learned, 2021
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1. before using stoch. cooling in ESR, boot and update the windows PC
2. better diagnostics for low energy/intensity beam-target overlapp in ESR is needed (either a clever analysis or a new detector)
more to come |
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Tue May 25 11:58:30 2021, Jan, Analysis, 118(p,g) counts until run0115, 2021
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The two attached plots show the collected Si data up to run0115.
Within this ~15h we have about ~70 counts in the peak region.
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Wed May 26 14:28:23 2021, Jan, Analysis, Xrays from 118Te & 124Xe, 2021
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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.
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Thu May 27 13:26:35 2021, Jan, Accelerator, FRS degrader failure, 2021
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Maybe, our degrader in FRS was removed by hand at (~13:40 26/05/21)
It is put back now (~13:10 27/05/21)
All runs taken in this period have to be double checked!
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