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.

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!

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

Recoil detector files backup to lxg1260:/data.local2/hillenbrand/Laszlo

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.

new event server is set up at lxg1299 on port 6003
It runs as:
/data.local1/gstore/mrevserv64 lxg1275

Si HV and current was switched in the last documentation.

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.

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

Attached is the header file needed for root analysis.

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 %. 

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%

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%

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%

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%

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%

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%