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  nuclear two-photon decay, Page 3 of 12  Not logged in ELOG logo
ID Date Author Categorydown Subject
  141   Tue Jun 29 21:12:15 2021 Kanika, ShahabRunsMoving the resonance frequency of the 245 MHz resonator
moving in the plungers:

before: 400
after: 200
  142   Tue Jun 29 21:15:01 2021 Kanika, ShahabRunslost beam problem Unilac
cooling water in UNILAC is out
  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 
  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
  170   Thu Jul 1 16:47:15 2021 Andrew NicRunsFrequency shift
The freqency suddenly shifted at time 16:11:47 and remained shifted until now 

The ESR status in the monitor stayed blue. No obvious sign that a magnet was down. The operators are checking

Sergey telephoned, he is also not sure but suggests stopping starting the ESR. We will wait for Yuri
  171   Thu Jul 1 17:01:43 2021 JacobusRunsFrequency shift
> The freqency suddenly shifted at time 16:11:47 and remained shifted until now 
> 
> The ESR status in the monitor stayed blue. No obvious sign that a magnet was down. The operators are checking
> 
> Sergey telephoned, he is also not sure but suggests stopping starting the ESR. We will wait for Yuri

In attachment, the moment when the shift occurred. 
  173   Thu Jul 1 18:07:10 2021 ShahabRunssettings of the analyzers after changing the trigger position
  174   Thu Jul 1 18:49:59 2021 ShahabRunspossible isomer?
  176   Thu Jul 1 18:56:49 2021 ShahabRunsShort interruption in recording
DAQs and NTCAP
  177   Thu Jul 1 19:24:59 2021 Nic Andrew ShahabRunsStart of data taking again
410 MHz resolution and power optimised


Last files before the restart were
245Mhz-2021.07.01.18.48.31.725.tiq
410MHz-2021.07.01.18.48.07.516.tiq
  183   Thu Jul 1 21:35:32 2021 ShahabRunssome pics after 15dB amplification on 410
  184   Thu Jul 1 23:07:47 2021 IK, KKRunssource
The change of the source happens now
  185   Thu Jul 1 23:38:55 2021 IK, KKRunsChange of gas bottle
The gas bottle has been changed and the beam is back.
  191   Fri Jul 2 01:39:51 2021 IK, KKRunsdrop of intensity
We see a drop in beam intensity from 7E9 to 2E8 between 01:30 and 01:43
  194   Fri Jul 2 03:10:03 2021 IK, KKRunsdrop of intensity
We see that intensity stabalized at 9E8 which is smaller then before. 
We neticed this at 2:50, keep observing.
  195   Fri Jul 2 03:19:49 2021 IK, KKRunsdrop of intensity
And the intensity is back again to 5E9 at 03:20
  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
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