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  proton-capture on 118Te, Page 26 of 29  Not logged in ELOG logo
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Entry  Mon Mar 23 01:17:26 2020, Shahab, General, Life time measurements using Schottky,  
Did Schottky measurements using 5 shots with and without gas target each
restarting the DAQ
Entry  Mon Mar 23 05:55:24 2020, Shahab, Runs, Kicker problem not solved yet,  
no solution to kicker problem. 
Entry  Mon Mar 23 03:58:25 2020, Shahab, General, Kicker guy arrived,  
Kicker Guy (U. Blell) arrived in order to fix modules.
Entry  Wed Oct 13 15:09:04 2021, Jan, Collaboration, K-REC cross sections A. Surzhykov, 2021 DCS_Z_52_Tp_7.049MeV_NEW.datDCS_Z_54_Tp_7.049MeV_NEW.datDCS_Z_52_Tp_6.042MeV_NEW.dat
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 %. 
Entry  Wed May 19 13:47:26 2021, Jan Glorius, General, GasTarget Operation, 2021 IMG_20210519_133923186_HDR.jpgIMG_20210519_133629322_HDR.jpg
We have two tasks to take over for the target operation:

1. We have to refill the blue LN2 bottle on the roof of ESR every morning (see 1st attached foto)
For this we use the small silver dewar on the floor there. In case this dewar is empty we have to refill it in the yard.
No need to stop the measurement for this.

2. We have to monitor the LN2-level warning on Ulis web page: http://ulpc24.gsi.de/mediawiki/index.php
In case there is a warning (~12h remaining), we have to refill the big dewar at the target in ESR.
This means we need ESR on TSG with the gate open.

In case the nozzle is clogging and we do not reach reasonable densities anymore and E1 pressure is going down, we have to heat up the nozzle manually.
This can be done at the control panel on the roof of ESR (see 2nd attached foto).
The proceedure is:
1. push "set point"
2. type new value in Kelvin (e.g. 100K for start of heating)
3. press "enter" to apply or "escape" to correct typo
4. monitor E1 pressure (should go up)

Overview page:
https://popps.org/cgi-bin/jet.py?gasart=Wasserstoff
Entry  Wed Sep 25 13:58:24 2019, Laszlo, General, Gamow window energies for 118Te(p,g),  PhysRevC.81.045807.pdf
# Z   A   Iso Re Rc   T9 upper width mxpos  shift
 52 118 te118 pg 20  0.5  1.39  0.58  1.06  -0.01
 52 118 te118 pg 20  1.0  2.27  1.04  1.69  -0.01
 52 118 te118 pg 20  1.5  3.04  1.46  2.21  -0.01
 52 118 te118 pg 20  2.0  3.71  1.82  2.68  -0.01
 52 118 te118 pg 20  2.5  4.32  2.16  3.10  -0.02
 52 118 te118 pg 20  3.0  4.85  2.44  3.47  -0.06
 52 118 te118 pg 20  3.5  5.35  2.73  3.79  -0.12
 52 118 te118 pg 20  4.0  5.79  2.97  4.08  -0.19
 52 118 te118 pg 20  5.0  6.55  3.38  4.61  -0.35

source: https://journals.aps.org/prc/supplemental/10.1103/PhysRevC.81.045807
Entry  Mon Mar 16 15:15:22 2020, Jan, Calibration, Gamma- and X-ray intensities for efficiency calib,  
Intensities for special gamma or x-ray lines needed for efficiency calibration can be found here:


ENSDF
https://www.nndc.bnl.gov/ensdf/#

NUDAT
https://www.nndc.bnl.gov/nudat2/

An old but still usefull data base:
http://nucleardata.nuclear.lu.se/toi/nucSearch.asp
Entry  Fri Mar 20 22:54:30 2020, Laszlo, General, First view of the beam,  IMG_20200320_222748.jpgIMG_20200320_223424.jpg
Intensity from Sis 1.7E9
The intensity is too.low at ESR to be visible. However we could.catch it somehow with Shottky (picture below)
Entry  Thu May 27 13:48:18 2021, Helmut Weick, Accelerator, FRS wrong status display for one day, 2021 drivestat-log.JPG
By checking the log files we realized that from yesterday 26.05. 13:44 - today 13:05 the FRS degrader was shown as out.
TS3ET7US should be at -420.0mm not at -580mm (=out). This 3.26mm Sci is used as a degrader and is essential.

After recognizing we set the drive controller back to remote and moved the degrader to -420mm (at 13:02)
The wrong values start on 26.05. at 13:44 and show variation until 16:11 until over night it was always shown as out.

It was tested today (~14h) that if you really move it out no beam is injected into ESR, but beam and even Te was observed in ESR last night.

The drive controller was in manual mode and it may not have given correct updates.
But it was also tested today that drives on the same crate get updates even in manual mode (at ~16h with TS1DG5_S and TS3ED7DS).

We also checked graylog. No drive command was issued yesterday in this time period, whereas the drive commands for testing today can be clearly seen.
Yesterday other drives in S4 area on the same controller were tested. This is most likely the reason for the manual mode.
Entry  Mon May 24 17:48:04 2021, Erika, General, FRS shiftplan, name abbreviations and phone list, 2021 FRS_shiftplan.pngFRS_name_abbreviations.PNGFRS_phone_list.PNG
FRS shift plan for this week:


Name abbreviations:


Phone numbers:
Entry  Mon May 24 05:20:36 2021, Helmut, Yuri, Faraz, Sergey, Accelerator, FRS setup, 2021 14x
Logbook from start of FRS until 118Te injection
Entry  Wed May 19 15:09:22 2021, Helmut Weick, General, FRS settings, LISE file, 2021 frequencies-E127.xlsxFRS-settings-E127.docx124Xe_ESR_Predrilling.lpp124Xe_118Te_2mmSci_oldmode.lpp124Xe_118Te_2mmSci_newoptics.lpp
Here is a setting plan for FRS and corresponding LISE files.
2 LISE files still use the old FRS-ESR optics, one the new with S6 focus on slits. 
But this does not make a big difference for the simulation, only dispersion S2-S6 is lower.
For realistic contaminants you must open the slits at S6 more(~ +/-10mm).
Added a list of fragments and expected frequencies after cooling at 400 MeV/u.
Only nuclides close to 118Te in m/q should be cooled.
Entry  Thu May 27 13:26:35 2021, Jan, Accelerator, FRS degrader failure, 2021 
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!

However, the xray lines from this night show Te for k_alpha and K-KREC

It is also possible that the readout of this degrader motor was just wrong due to its state as hand-controlled.
Entry  Sat Mar 21 12:32:00 2020, Laszlo, General, Estimated target thickness,  
Target thickness must be like 5mm (was measured with a moving thin wire)
The beam thickness is small because of the low intensity
Maybe we hit the target a bit offset --> less rate?

We might have the option to increase the target 1magnitude more, but this might not help because we can kill the beam 
with this.

I have the impression we just simply have less number of stored ions like 10^4 or evem less...

Yury: "we are unsure about the settings and desperately seek for any means of additional diagnostics"
Entry  Sat Mar 21 12:42:21 2020, Ragan, General, Entry to ESR for MCP detector,  
Pierre Michel and Laszlo go inside the ESR for switching on the MCP detector so that the photons from the gas jet and secondary beam interaction can be seen.

Close file: run061
Entry  Mon Mar 23 01:53:59 2020, Shahab, Runs, Empty shots in ESR,  
since about 01:40 AM, there is no beam in ESR. .
stopped data acquisition
OPs are working on it. After searching, OPs decided that something is wrong with ESR.
Entry  Thu Jul 8 13:39:34 2021, Jan, Calibration, Electron cooler parameters, 2021 
Below are the results from the e-cooler voltage offset measurments done by Regina Hess et al. using the voltage divider (VD).

--7 MeV-- 
Sollwert GECEBG1E: 4008.3 V     
Measured at VD: 3913 V
Offset: -95.3 V

--6 MeV-- 
Sollwert GECEBG1E: 3460.5 V     
Measured at VD: 3364 V 
Offset: -96.5 V

Below are the cooler parameters from ParaModi for our production runs.

--7 MeV/u--
UE: 3842.7V
IE: 50mA
BG1E: 4008.7V
BG1E dU: 120V

--6 MeV/u--
UE: 3290.833V
IE: 50mA
BG1E: 3460.4809V
BG1E dU: 120V

--energy calculation--
as described here 

-- uncertainty --
for E108b we agreed on 10%
maybe further discussion is needed
Entry  Wed Jun 23 12:29:35 2021, Jan, Sophia, Calibration, Efficiency of the x-ray Detectors , 2021 Effizienz_x_ray_GEM1800_90.pngEffizienz_x_ray_GEM3000_145.pngEffizienz_x_ray_GLP_35_ohne33keV.png
For the x-ray detectors, efficiencies have been measured, before and after the experiment was performed. 
The preliminary results of the determined efficiencies can be seen in the attached plots 
Entry  Tue May 25 07:51:48 2021, Jan, Accelerator, ESR stacking cycle length, 2021 
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.
Entry  Mon Mar 23 06:49:46 2020, Shahab, Runs, ESR kicker also has some problems,  
 
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