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  nuclear two-photon decay 2024, Page 4 of 6  Not logged in ELOG logo
ID Date Authordown Category Subject
  78   Fri May 17 22:06:05 2024 Jelena B, Zsolt P.AcceleratorESR
ESR is down
  Draft   Fri May 17 22:38:30 2024 Jelena B, Zsolt P. ESR + e.cooler are back
We have back ESR and fixed issue with a cooler. 
  80   Fri May 17 22:43:11 2024 Jelena B, Zsolt P.AcceleratorESR_e.cooler are back
We have back ESR and we have a fixed issue with a cooler. 

Beam issues! 
  81   Fri May 17 22:48:14 2024 Jelena BAcceleratorBack to old setting
We go back to the Zr-settings to make a deffinite state of ESR and we move again to previous setting (Sr) 
  1   Tue Apr 16 15:35:07 2024 JanCollaborationG-PAC Proposal
  60   Thu May 16 19:10:27 2024 Ide, Hubbard, Xinliang, David, ShahabRunsNew Run setting for Zr Isomer hunt
19:10 runs from now on run with an optimized setting:

we did a lot of optimization for the hunt of Zr isomer:

1- increased the time as much as possible, but stay within the 1:1 cycle with FRS
2- increased the sampling rate from 6.25 MSPS to 50 MSPS (!) going down to very short recording times --> 300ms only

We are now taking data with this settings for about half an hour.
  52   Thu May 16 15:24:30 2024 Ide, HubbardAcceleratornew Plunger setting
plunger motors were set

to +/-390 mm for 245 MHz resonator
and +/-55 mm for 410 MHz resonator
  53   Thu May 16 16:10:03 2024 Ide, HubbardRunsLassie Screenshot
Lassie Screenshot taken at 16:09
  54   Thu May 16 16:38:11 2024 Ide, HubbardRunsNo beam to ESR
because of problems in HHT
no beam from 16:36
  56   Thu May 16 16:45:33 2024 Ide, HubbardRunsBeam returned to ESR
beam is back
16:45
  57   Thu May 16 18:28:31 2024 Ide, HubbardRunsNo beam to ESR
beam issues between 18:23-18:26
and beam completely lost from 18:27 till 18:32
in the SIS an issue with a dipole occured
  58   Thu May 16 18:33:30 2024 Ide, HubbardRunsBeam returned to ESR
Beam is back at 18:32 
now in the particle plot the peaks seem to be more isolated than before (see attachment 1)
since 18:36 it looks like before (see attachment 2)
  59   Thu May 16 18:55:38 2024 Ide, HubbardGeneralnew timing cycle
new timing cycle of 6.7s
  61   Thu May 16 21:13:18 2024 Ide, HubbardRunsIntensity drop
The intensity dropped at 21:10 from ~ 1.6E9 down to ~ 8E8
  62   Thu May 16 21:26:50 2024 Ide, HubbardRunsIntensity back to previous values
since 21:20 the intensity is back to 1.5E9
  63   Thu May 16 21:40:20 2024 Ide, HubbardRunsIntensity drop
Intensity in particles dropped from 21:33
  64   Thu May 16 21:51:22 2024 Ide, HubbardRunsIntensity back to previous values
since 21:48 particle intensities increased to again to 1.5E9
  Draft   Fri May 17 17:03:39 2024 Helmut, YuryAcceleratorapprox. 96Sr setting
Only 96Sr would yield very few line with only ions from tiem to time.
So we went a bit lower in Brho 7.69 Tm -> 7.65 Tm.
The setting is calculated as a 98Mo39+.
E-SIS = 455.3 MeV/ for 100Mo.
after target 98Mo now with 39+ gives 7.6500 Tm.
In ESR also 39+.
In LISE we get the same average gamma as before for 98Zr (gamma = 1.40082).
  72   Fri May 17 17:09:26 2024 Helmut, YuryAcceleratorapprox. 96Sr setting (98Zr39+)
Only 96Sr would yield very few line with only ions from time to time.
So we went a bit lower in Brho 7.69 Tm -> 7.65 Tm.
The setting is calculated as a 98Mo39+.
E-SIS = 455.3 MeV/ for 100Mo,
after target 98Mo now with 39+ gives 7.6500 Tm.
In ESR also 39+.
In LISE we get the same average gamma as before for 98Zr (gamma = 1.40082).

The 98Zr was also entered as a 98Mo40+-
  98   Sat May 18 16:45:15 2024 Helmut, YuryAcceleratorsetting for 96Sr (98Y)
To have a few more lines the setting actually is not on 96Sr directly, but on 98Y39+.
98Y is also the one set to be isochronous. 
But in addition the SIS-energy is shifted by -0.9 MeV/u to get at least better transmission for 96Sr.
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