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  nuclear two-photon decay, Page 11 of 12  Not logged in ELOG logo
ID Date Author Category Subjectdown
  150   Wed Jun 30 12:35:53 2021 Rui-Jiu ChenAnalysisChange reference level to -20dBm. Turn of amplifier.
SC_2021-06-30_12_35_52
IQ_2021-06-30_12_35_43
Reference level=-20dBm
  78   Sat May 8 18:35:25 2021 Rui-Jiu ChenDAQChange reference level to -10dBm
The beam in ESR is 78Kr36+@476 MeV/u.
Start a new run:
SC_2021-05-08_18-25-52
IQ_2021-05-08_18-25-52
  212   Fri Jul 2 14:18:04 2021 Pavlos, AlexandreRunsChange of the measurment to 72Br
Both resonators will now be retuned to look for the isomeric state in 72Br.

Last files for 70Se are:
245MHz-2021.07.02.14.17.14.507.tiq
410MHz-2021.07.02.14.16.48.528.tiq
  210   Fri Jul 2 13:37:00 2021 Pavlos, AlexandreDAQChange of the measurement time from 10s to 20s
Last files with the measurement time of 10s for the two resonators are:

245MHz-2021.07.02.13.36.00.674.tiq
410MHz-2021.07.02.13.35.34.758.tiq
  185   Thu Jul 1 23:38:55 2021 IK, KKRunsChange of gas bottle
The gas bottle has been changed and the beam is back.
  105   Sun May 9 13:53:07 2021 Yuri, Wolfram, Andrew, LilianaCalibrationChange of energy: Back as before
After looking at the spectrum it was concluded that the same isotopes, and no more, could be identified. 
Now we change the energy back to 441.7 MeV/u and will open the scrappers to see if Mn comes in. 

The picture shows the effect of going back to the previous energy and then the effect of opening the scrappers
  19   Thu May 6 22:05:30 2021 HelmutAcceleratorBeamline and ESR data sets for 72Ge setting
parammodi exports, E-SIS = 441.0 MeV/u with Be-1840 mg/cm² target in, isoc. ESR, at least we see fragments
  38   Fri May 7 09:36:32 2021 Ragan, Andrew, YuriGeneralBeam stop at 0928, adjust scope
It was requested from the SIS to stop the beam at 09:28 
Yuri is adjusting the scope in order to avoid UFO (unidentified frequency object)
  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
  25   Fri May 7 02:01:08 2021 Liliana, Akash, Wolfram, Helmut, ShahabAcceleratorBeam issues for short duration
RFQ fall-out (HKR working on it...)

Beam stop time: 01.58am

Beam resumption: 02.02am
  61   Fri May 7 23:08:44 2021 Michael, KanikaAcceleratorBeam issues for short duration
The beam was lost for a few minutes from 23:01 to 23:06. It is back now.
  92   Sun May 9 04:15:50 2021 Michele, Jacobus, ShahabRunsBeam issues for short duration
ESR warning (colour red in the panel)

Operator intervention required. 

Runs affected by this issue: 

-from E143-245MHz-2021.05.09.02.49.48.521 (03:50) 
-to E143-245MHz-2021.05.09.02.54.54.239 (03:54) .  



  
  47   Fri May 7 14:33:23 2021 Andrew Ragan Yuri GeneralBeam is back
  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.
  165   Thu Jul 1 04:15:54 2021 David, LilianaGeneralBeam intensity
From 4:05 to 4:15 beam intensity was 1/2 as before. 
  166   Thu Jul 1 07:28:55 2021 Jan, AkashAcceleratorBeam intensity
Intensity went up from 5e8 to 1e9 extracted particles from SIS.
  75   Sat May 8 15:18:23 2021 Michael, Wolfram, YuriGeneralBeam Settings changing
Beam settings are being changed back to 78Kr beam at 467 Mev/u. 
  10   Thu May 6 14:28:32 2021 Helmut WeickCalibrationBe target thickness calibration -> 1839 mg/cm^2
Injection was optimized before with Cu-40 mg/cm^2 stripper.
This reduces energy of 78Kr from 370 MeV/u -> 386.52 MeV/u.
To keep the same ESR injetion the SIS energy was raised with Be 10mm tatget.
For exactly 1850 mg/cm^2 a SIS-energy of 445.46 MeV/u would be needed. A scan of SIS energy resulted in 445.0 MeV/u as optimal.
This means target thickness is close to 1850 mg/cm^2, we can call it 1839 mg/cm^2.
  45   Fri May 7 12:37:35 2021 Ragan, Andrew, Yuri, AlexGeneralBack with beam
We are back with the beam in the ESR since 12:30
ALL SCRAPERS ARE IN THE ORIGINAL POSITIONS
E02DS3HG = - 35 mm
EEXDS2HA = - 25 mm
EEXDS1HA = - 25 mm
E01DS_H = - 40 mm

For E02DS3HG a reset in the control system needed to be done.
  103   Sun May 9 12:53:01 2021 Desislava Kalaydjieva, Taka YamaguchiAnalysisAnalysis, Morning shift, 9 May
For the whole morning shift there were no significant changes in the spectra.

Some of the obtained histograms are attached below. 
The python code was used and the histogram was plotted in ROOT with log y scale. 
The time, the used code options and the data type are marked in the filenames or in the description below. 

Attachment 1-4: 245MHz, options used " -s 5.1 -t 0.5 ", time marked in the filename (time as in the title of the files on the server (-1h of the real time)).

Attachment 5: 410MHz, with the same options for the python code, real time names. It is different from 245MHz histogram.
Attachment 6: Comparison between 245MHz histogram and 410MHz histogram for real time 10:00 - 11:00.
Note: This difference is observed in the histograms from the early morning hours too (checked up to 4 o'clock).

Attachment 7: 245MHz data, with options "-s 5.0 (Red) / -s 5.05 (Green) / -5.1 (Blue) -t 0.5" (real time 08:00 - 09:00)
Attachment 8: 245MHz data, with options "-s 5.0 (Red) / -s 5.05 (Green) / -5.1 (Blue) -t 0.1" (real time 08:00 - 09:00)
Attachment 9: 410MHz data, with options "-s 5.0 (Red) / -s 5.05 (Green) / -5.1 (Blue) -t 0.5" (real time 08:00 - 09:00)
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