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  nuclear two-photon decay, Page 3 of 12  Not logged in ELOG logo
ID Date Authordown Category Subject
  31   Fri May 7 04:26:54 2021 ShahabRuns245 MHz resonator extra 20dB gain off
made sure that the extra 20dB amplifier is off.
  113   Sun May 9 20:39:17 2021 ShahabRunsSubtracting the background
still in the search of 70-Se
Attachment 1: spectrum_subtraction.png
spectrum_subtraction.png
  140   Tue Jun 29 21:10:30 2021 ShahabRuns72-Ge setting
the new setting is roughly 400 khz lower in frequency.
Previous beam time Ge was on 243.100 now it is on 242.74

we decided to use the higher harmonic:

expecting it on 244.66 MHz
  145   Wed Jun 30 01:38:20 2021 ShahabRunsbeam is back from Linac but not in the ESR
  146   Wed Jun 30 02:12:46 2021 ShahabRunsstill no beam in ESR: quadrupole magnets are down
still no beam in ESR: quadrupole magnets are down
  151   Wed Jun 30 13:04:40 2021 ShahabRuns245 Amplifier on
turned on extra 20dB amplifier for the 245 Resonator around 12:32 
Attachment 1: amplification_on245.png
amplification_on245.png
  156   Wed Jun 30 15:21:44 2021 ShahabRunsdata synch on WWW server
Data is being shared on the WWW server.
Time difference between the analyzers is in order of seconds:

time stamp of the 245MHz data is leading those of 410MHz by 21.733 [s]
  158   Wed Jun 30 19:59:39 2021 ShahabRunsScraper positions
current scraper positions suggested by Sergey:

GEEXDS2HA = -11mm
GE01DS-H (innen) = -58mm
  173   Thu Jul 1 18:07:10 2021 ShahabRunssettings of the analyzers after changing the trigger position
Attachment 1: asd.jpg
asd.jpg
Attachment 2: asd2.jpg
asd2.jpg
  174   Thu Jul 1 18:49:59 2021 ShahabRunspossible isomer?
Attachment 1: possible_isomer.png
possible_isomer.png
  176   Thu Jul 1 18:56:49 2021 ShahabRunsShort interruption in recording
DAQs and NTCAP
  178   Thu Jul 1 19:34:11 2021 ShahabDAQincrease factor 4 in power for 410
increase factor 4 in power for 410 



before:

410MHz-2021.07.01.18.48.07.516.tiq.png


after:

410MHz-2021.07.01.19.23.49.099.tiq.png
Attachment 1: 410MHz-2021.07.01.19.23.49.099.tiq.png
410MHz-2021.07.01.19.23.49.099.tiq.png
Attachment 2: 410MHz-2021.07.01.18.48.07.516.tiq.png
410MHz-2021.07.01.18.48.07.516.tiq.png
  182   Thu Jul 1 21:35:15 2021 ShahabDAQincrease factor 4 in power for 410
increase factor 4 in power for 410 



before:

410MHz-2021.07.01.18.48.07.516.tiq.png


after:

410MHz-2021.07.01.19.23.49.099.tiq.png
  183   Thu Jul 1 21:35:32 2021 ShahabRunssome pics after 15dB amplification on 410
Attachment 1: asd.png
asd.png
Attachment 2: 821.png
821.png
  211   Fri Jul 2 13:44:50 2021 Sergey, et alAcceleratorEl cooler
Up to now, attempts to cool the fat line between Se and Ar were conducted. We give up it now and remove cooling
  49   Fri May 7 16:17:21 2021 Sergey, Yuri, Wolfram, ShahabRunsnew sextupole setting
new sextupole setting, isomer not visible yet.
  137   Tue Jun 29 10:32:10 2021 Sergey, HelmutAcceleratorcooler curves for tuning of isochronicity
Variation of quadrupole E01QS03D to change gamma_t in isoc. mode
measured with 78Kr at 368.5 MeV/u on 28.06.2021 evening.
The shape of the three curves looks very similar they would only require a different beam velocity.
But I suppose we stay with the value close to the old one (gamma_t ~ 1.3956).
Attachment 1: isoc_curves.JPG
isoc_curves.JPG
Attachment 2: iso_curves_june_2021_1.xlsx
  136   Mon Jun 28 18:32:49 2021 Ruijiu, ShahabDAQtrigger signal connected to NTCAP and analyzers
Attachment 1: tri.jpg
tri.jpg
  20   Thu May 6 23:06:18 2021 Rui-Jiu ChenDAQChange reference level to -50dBm
Beam is secondary beam now. The intensity is lower. Change reference level to -50dBm.
Carrier frequency:245MHz
IQ rate(S/s): 20M.
Reference Level: -50 dBm.

Start taking data.
SC_2021-05-06_23_02_46
IQ_2021-05-06_23_02_33
  22   Fri May 7 01:44:24 2021 Rui-Jiu ChenDAQChange reference level to -40dBm
Reference Level: -40 dBm.

Start taking data.
SC_2021-05-07_00-06-57
IQ_2021-05-07_00-06-57
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