 Fri Mar 20 04:29:45 2020, Jan, DAQ, DAQ settings for the first night, 
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Fri Mar 20 16:54:53 2020, Jan, DAQ, BaF OFF downscaled red=32,
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I introduced a downscaling by a factor of 2^5=32 for the BaF2 during target OFF.
The reason is, that we get a lot reasonable x-ray counts (K-alpha, K-REC) outside target ON phase.
So i want to minimize our deadtime during target OFF, to be able to use the data efficiently if needed.
BaF2 is not really needed in target OFF. |
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Fri Mar 20 16:58:02 2020, Jan, DAQ, Xray2 & Xray3 cabling,
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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! |
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Sat Mar 21 22:57:28 2020, Laszlo, Jan, DAQ, changing cables of the Xray 90 and 145,
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Energy signals of 90 and 145 degree detector have been checked and exchanged
They were connected to the wrong ADC channel.
Now
E_Xray2 and t_Xray2 should belong to 90 degree
E_Xray3 and t_Xray3 belong to 145 degree |
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Mon Mar 23 14:23:01 2020, Pierre-Michel, DAQ, Backup recoil files,
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Recoil detector files backup to lxg1260:/data.local2/hillenbrand/Laszlo |
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Fri Apr 30 10:55:34 2021, Jan Glorius, DAQ, Xray multi-triggers - blocking gate, 2021
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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. |
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Thu May 6 11:03:46 2021, Jan Glorius, DAQ, Cabling Documentation, 2021
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Sun May 16 12:55:48 2021, Jan Glorius, DAQ, event server lxg1299:6003, 2021
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new event server is set up at lxg1299 on port 6003
It runs as:
/data.local1/gstore/mrevserv64 lxg1275 |
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Sun May 16 13:31:49 2021, Laszlo, DAQ, Cabling Documentation, 2021
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Si HV and current was switched in the last documentation. |
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Mon May 24 06:30:42 2021, Ragan, DAQ, NTCAP, 2021
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NTCAP started for recording Schottky data
SC_2021-05-24_06-29-31
\IQ_2021-05-24_06-29-31
Reference level: -30 dBm
Carrier frequency: 245 M
IQ Rate: 20 MS/s
RF attenuation (dB): 40
IF attenuation (dB): 19.9288
masterpath:
o:\E143\iq
ESR settings:
We recorded 3-4 full cycles with 5 stacks.
Then we recorded in SC5 manipulation for 10 min and afterwards in SC3 manipulation for 10 min. |
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Thu Jun 24 09:43:01 2021, Jan Glorius, DAQ, Unpacker, 2021
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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 |
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Wed Oct 13 15:15:53 2021, Jan, DAQ, root-file header for analysis, 2021
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Attached is the header file needed for root analysis. |
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Thu Sep 13 11:42:33 2018, Jan Glorius, Collaboration, Proposal,
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| Attached is the beam time proposal submitted and accepted by the G-PAC in 2017. |
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Wed Oct 13 15:09:04 2021, Jan, Collaboration, K-REC cross sections A. Surzhykov, 2021
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Attached are the theory K-REC cross sections as calculated by Andrey Surzhykov (August 2021).
They are done for 118Te52+ on H2 at 7.049 and 6.042 MeV/u as well as for 124Xe54+ on H2 at 7.049 MeV/u.
first column - photon angle (deg), second column - cross section (barn/sr). The results are given already in the laboratory frame.
Comment of Andrey on uncertainty:
Important question about theoretical model and, hence, accuracy of calculations. I used slightly improved "impulse approximation" that takes into account momentum and energy distribution of target electron (in initial state). By playing with the models for the Compton profile of target electron, I estimate the accuracy of calculations as 1 %. To be fair, it is rather conservative estimate. I suspect that for large emission angle (around 90 deg) accuracy is even better. But let us stay with 1 %. |
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Sun Mar 15 09:42:40 2020, Jan, Calibration, run030 - Xray90 calib Am241,
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measurement with old tennelec specAmps, do not use for efficiency!
Detector: 90
Source: Am-241
Distance: 167.5mm
Start time: 13:06:55 15.03.2020
Stop time: 13:24:57 15.03.2020
file name: run030_xxxx.lmd
avrg. rate: 650Hz
dead-time: 7% |
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Sun Mar 15 13:08:38 2020, Jan, Calibration, run031 - Xray90 calib Ba133 hi-rate,
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measurement with old tennelec specAmps, do not use for efficiency!
Detector: 90
Source: Ba-133 strong source
Distance: 167.5mm
Start time: 13:28:42 15.03.2020
Stop time:13:38:16 15.03.2020
file name: run031_xxxx.lmd
avrg. rate: 2.7kHz
dead-time: 25% |
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Sun Mar 15 13:40:11 2020, Jan, Calibration, run032 - Xray90 calib Ba133,
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measurement with old tennelec specAmps, do not use for efficiency!
Detector: 90
Source: Ba-133 weak source
Distance: 167.5mm
Start time: 13:39:30 15.03.2020
Stop time: 13:50:55 15.03.2020
file name: run032_xxxx.lmd
avrg. rate: 150Hz
dead-time: 1.5% |
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Sun Mar 15 13:52:05 2020, Jan, Calibration, run033 - Xray145 calib Am241,
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measurement with old tennelec specAmps, do not use for efficiency!
Detector: 145
Source: Am-241
Distance: 305mm
Start time: 14:15;56 15.03.2020
Stop time: 14:40:21 15.03.2020
file name: run033_xxxx.lmd
avrg. rate: 300Hz
dead-time: 4% |
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Sun Mar 15 14:41:34 2020, Jan, Calibration, run034 - Xray145 calib B133 high rate -SOURCE MOVED!,
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measurement with old tennelec specAmps, do not use for efficiency!
The source moved during the calibration, measurement stopped at half time.
Detector: 145
Source: B133 high rate
Distance: 305mm
Start time: 14:54:47 15.03.2020
Stop time: 15:06:53 15.03.2020
file name: run034_xxxx.lmd
avrg. rate: 1kHz
dead-time: 11% |
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Sun Mar 15 15:08:44 2020, Jan, Calibration, run035 - Xray145 calib B133 high rate,
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measurement with old tennelec specAmps, do not use for efficiency!
Detector: 145
Source: B133 high rate
Distance: 305mm
Start time: 15:10:15 15.03.2020
Stop time: 15:31:16 15.03.2020
file name: run035_xxxx.lmd
avrg. rate: 1kHz
dead-time: 12% |