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  nuclear two-photon decay, Page 5 of 12  Not logged in ELOG logo
ID Date Author Categorydown Subject
  102   Sun May 9 08:00:03 2021 Liliana, AndrewGeneralStatus
So far, we keep the setting as it is and wait for experts to come in. 
Few spills are missing from time to time. One of the peaks stays usually in the spectrum when this happens. 
Analysis of the last hours is being performed by the remote shift, in case it is useful. Some plots in telegram. 
Attachment 1: Screenshot_2021-05-09_08-01-17.png
Screenshot_2021-05-09_08-01-17.png
  123   Mon May 10 00:51:38 2021 Kanika, Alex, RuiJiuGeneralNo beam in SIS
The beam was lost in SIS about 5 mins ago due to the failure of HF cavities. Operators are trying to solve the problem.
  124   Mon May 10 01:01:59 2021 Kanika, Alex, RuiJiuGeneralBeam is back
The issue has been resolved and the beam is back since 00:56.
  125   Mon May 10 01:34:37 2021 Chris CGeneralZoom screenshot
How things look currently in Zoom-world.
Attachment 1: Zoom_monitoring_2021-10-05_0131CET.PNG
Zoom_monitoring_2021-10-05_0131CET.PNG
  133   Mon May 10 08:49:01 2021 Kanika, Alex, RuiJiuGeneralEnd of the measurement
The beam was stopped at about 08:40.
  154   Wed Jun 30 14:48:54 2021 OliverGeneralData taking - and not...
We just started data taking. But a few minutes later the main experiment needed to do some adjustements to the beam. This interrupts us for a couple of minutes...
  155   Wed Jun 30 14:52:28 2021 OliverGeneralRe-Started data taking...
Main user is finished. We started data taking again...
  159   Wed Jun 30 20:14:44 2021 Ragan, HelenaGeneralDrop in SIS intensity
There is a drop in SIS intensity and the operators are informed.
  160   Wed Jun 30 20:21:47 2021 Ragan, HelenaGeneralSIS intensity is back
SIS intensity is back
  161   Wed Jun 30 20:58:06 2021 Ragan, HelenaGeneralFew minutes of disruption
There was a disruption from the SIS side for a few minutes.
  163   Thu Jul 1 00:09:28 2021 David, LilianaGeneralLow beam intensity for few minutes
For few minutes (starting at 00:05) beam intensity went down. Same as it was reported by the previous shift. 
Until 00:27 beam had lower intensity than before (3e8) 
Now intensity is back to 5e8.
  164   Thu Jul 1 01:35:15 2021 David, LilianaGeneralIon source change
Changing ion source, no beam expected for the next 30 minutes.

2:15--> Beam is back, intensity not as high as before but will increase in the next few minutes as the source gets hotter.
  165   Thu Jul 1 04:15:54 2021 David, LilianaGeneralBeam intensity
From 4:05 to 4:15 beam intensity was 1/2 as before. 
  169   Thu Jul 1 16:27:57 2021 Andrew NicGeneralNTCAP parameters
The latest recorded tdms files:
 p:\E143\sc\SC_2021-06-30_23-27-45\0000233
 p:\E143\iq\IQ_2021-06-30_23-27-34\0001138
2. The rest space on the drive "p:\" : 30,4TByte
  175   Thu Jul 1 18:54:44 2021 Andrew, NicGeneralNTCap Status
The latest recorded tdms files:
 p:\E143\sc\SC_2021-06-30_23-27-45\0000267
 p:\E143\iq\IQ_2021-06-30_23-27-34\0001305
2. The rest space on the drive "p:\" : 29,8TByte
  186   Thu Jul 1 23:46:17 2021 IrisGeneralLess beam after gas bottle change?
Looks like there is a bit less beam now in the ring. I just looked at one spectra from before the gas bottle change and after...
Attachment 1: Comparison-21h-2340h.png
Comparison-21h-2340h.png
  187   Thu Jul 1 23:54:43 2021 IrisGeneralLess beam after gas bottle change?
No, everything okay! Must have had a very good earlier run to compare.

> Looks like there is a bit less beam now in the ring. I just looked at one spectra from before the gas bottle change and after...
Attachment 1: Comparison-21h-2350h.png
Comparison-21h-2350h.png
  216   Fri Jul 2 17:31:04 2021 LilianaGeneralstatus
at 17:20 intensity was suddenly reduced. 
Operators checked. Intensity was a bit low and fluctuating for a while (8e8 to 1e9)
Intensity (1.5e9) was recovered at 18:16
  234   Sat Jul 3 08:12:22 2021 Dima, YuriGeneralBeam stop
We stopped the beam at 08:10

The latest recorded tdms files:
 p:\E143\sc\SC_2021-06-30_23-27-45\0000778
 p:\E143\iq\IQ_2021-06-30_23-27-34\0003806
2. The rest space on the drive "p:\" : 20,0 TByte
  9   Thu May 6 13:26:56 2021 Helmut WeickDetectorsTE5 profile grids do not work
There are several issues.

1. The stepper motor drive does not react from Device-Control, -> check controller in FRS Messhütte
2. They don't get a trigger, other grids in TE-line do -> check raw signals also in FRS Messhütte, ask Strahldiagnose
3. For less noise pockets of grids should be evacuated, but most likely the pump is still off or not even connected -> enter ESR and connect

Check also manual at https://web-docs.gsi.de/~weick/frs/current_grids.html
Below picture of no trigger shown in App. Usually it should say last trigger a few seconds ago and display some noise.
Attachment 1: no_trigger.png
no_trigger.png
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