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  proton-capture on 118Te, Page 29 of 29  Not logged in ELOG logo
New entries since:Thu Jan 1 01:00:00 1970
ID Date Author Categorydown Subject Year
  448   Tue May 25 15:56:48 2021 Robert/ShahabAcceleratorTrafo2021
Trafo was set to 0
  449   Tue May 25 17:12:59 2021 Robert/ShahabAcceleratorBeam2021
Beam is back; It is now being optimized
  450   Tue May 25 18:46:04 2021 Robert/ShahabAcceleratorQuadrupoles down2021
All quadrupoles went off, waiting for the on-call service
  496   Thu May 27 13:26:35 2021 JanAcceleratorFRS degrader failure2021
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.
  497   Thu May 27 13:48:18 2021 Helmut WeickAcceleratorFRS wrong status display for one day2021
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.
Attachment 1: drivestat-log.JPG
drivestat-log.JPG
  Draft   Fri Aug 9 13:14:09 2019 Laszlo pn channel simulations for 111Sn(p,g)112Sb experiment 
The p,n channel opening for the 111Sn+p reaction is at 5.8895 MeV/u beam energy. Therefore, when choosing as 6MeV/u, 7MeV/u, 8MeV/u beam energies, there is not much kinetic energy left for the outgoing neutron --> there are "less" nuclear levels populated above groundstate in 111Sb, they can be handled explicitly. My simulations are based on TALYS results. The following steps did I made:

1, choose an energy for the 111Sn beam. for this example let it be 8AMeV. 
  118   Sat Mar 21 11:25:47 2020 Laszlo possible misalignement between target and fragment beam 
after 9hours of measurement we see only 19 counts on our targetON silicon detector histo. this low count rate can indicate two scenarios:
-we have a mismatch between the beam and the target (not much if any overlap)
-mabye the very low intersity of the beam (we cannot really monitor this, there are only estimates...)

Which tells us that we dont intersect with the target, that on the Xray spectras we dont see any peaks at 90 and 145 angles. There are two peaks in 35 angle, but they are maybe only from Pb conversion 75keV, etc...
Attachment 1: Te_measurement_after_first_night.png
Te_measurement_after_first_night.png
  128   Sat Mar 21 13:37:53 2020 Laszlo MCP can monitor target 
now with the MCP we can see clearly the effect of the target :) (scintillation?)
so we want to scan through the target thickness with the beam and choose the best position afterwards.

We are making 3shoots for each bumb position (we change the bumb to make the intersection between beam and target) starting at ~14:

the data will be saved at the lxg1299 data.local2/hillenbrand/Laszlo folder
  199   Sun Mar 22 17:47:27 2020 Laszlo Si, Xrays target density spectra during 118Te afternoon measurement 
We got 30 counts out of this afternoon 118Te run on our Si TargetON histo.
That 1 count at bin (6,10) I dont understand.

Now i can see peaks both at the 35 and 90 angle Xray spectra but not much on the 145 one.
At the end the target density stayed at 8.6E13.
Attachment 1: End_of_118Te_runs.png
End_of_118Te_runs.png
Attachment 2: target_density_during_118Te_afternoon_runs.png
target_density_during_118Te_afternoon_runs.png
  201   Sun Mar 22 18:35:43 2020 Laszlo target dropped aagain 
there was a drop again from 8.6e13 to 7e13 in the target density
Attachment 1: target_density_after_118Te_afternoon_runs.png
target_density_after_118Te_afternoon_runs.png
  203   Sun Mar 22 19:15:03 2020 Laszlo Si moved out of the ring, high voltage is switched off 
  204   Sun Mar 22 19:49:12 2020 Michael, Laszlo, Yuri Yuri is still tuning FRS 
We filled the Xray detectors.
Yuri is sill tuning FRS for primary beam.
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