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  masses & isomeres 2025, Page 11 of 17  Not logged in ELOG logo
ID Date Author Category Subject
  130   Thu Apr 3 18:53:02 2025 Usama, KathrinGeneralScreenshots
  129   Thu Apr 3 18:01:49 2025 Ruijiu, CarloAnalysisIdentification of 188Hf
  128   Thu Apr 3 17:49:57 2025 Usama, KathrinGeneralScreenshots
  127   Thu Apr 3 17:38:47 2025 Shahab, Zac, Carlo, Esther and many moreDAQRSAs run again!
first file name RSA01....17.38 onwards.
  126   Thu Apr 3 17:01:07 2025 CJ Griffin, M Cockshutt, G LeckenbyGeneralMoving PLEIADES detectors in
The inner PLEIADES is moved into position close to the beam.
Device control for the outside pocket is not currently working so that pocket remains in its outward position.

NTCAP/Schottky data acquisition stopped during pocket position tests.

Inner detector (x86l-124 BGO)
Device: GE01DD2IG
Position: +20 mm
Scraping beam: not possible

Outer detector (x86l-131 GAGG)
Device: GE01DD2AG
Position: -127 mm
Scraping beam: 
  125   Thu Apr 3 16:44:18 2025 Usama, KathrinGeneralScreenshots
  124   Thu Apr 3 15:57:16 2025 Shahab, Yue, Zac, EstherDAQData acquisitions running
All data acquisitions (both RSAs and NTCAP) are now running.
  123   Thu Apr 3 15:55:04 2025 Shahab, Yue, EstherCalibrationSchottky settings
Settings similar to the 2-photon experiment.

Central frequency: 411.742243 MHz (based on Ruijius identification for 188Hf72+)
  122   Thu Apr 3 15:21:42 2025 CJGGeneralPLEIADES shift instructions
PLEIADES shift instructions available at:
https://docs.google.com/document/d/19b4wyugC3OpVAjwt1ONM9u8EYdMJsBpL7GVNzoziv0M/edit?usp=sharing

Leakage current tracking:
https://docs.google.com/spreadsheets/d/1Gt1tFHwn4XFrJ5_-nQvTi635UD0aHgN6gCdXDTHQdkI/edit?gid=299353113#gid=299353113

Leakage currents should be documented every ~1-2 hours while the detectors are biased.
  121   Thu Apr 3 13:36:17 2025 Ruijiu,Yuri, Wolfram,ZsoltAnalysis188Hf identification
  120   Thu Apr 3 13:32:42 2025 CN, IDGeneralScreenshots
  119   Thu Apr 3 11:51:00 2025 CN, IDDAQRSA started for 188Hf ESR tuning
Started both RSAs for the tuning of the ESR to 188Hf. Both pockets are in parking position OUTSIDE.
  118   Thu Apr 3 10:07:34 2025 CN, ZP, CJG, MCGeneralScreenshots
  117   Thu Apr 3 09:53:02 2025 Ruijiu Chen,WolframAnalysisGood injection ratio
Currently, we only use 37% of the injections in our data analysis. However, 63% of the injections have a height below 100, and these may include 
single ion injections. We need to visually inspect these injections to identify the single ion injections.
  116   Thu Apr 3 09:43:14 2025 AllAcceleratorStop 194Pb, switch to 208Pb82+
The repair of SIS electron cooler power supplies

In the meantime we received a few injections and confirmed that 194Pb setting is still as it was before entering into the ESR

Now we change to 208Pb82+ to do several ESR accelerator tests

Esis = 517 MeV/u
Change the beamline to 208 Pb 82+ and the ESR to 208 b 82+ and NO other changes
  115   Thu Apr 3 09:34:42 2025 IDGeneralFinished in the ESR as of 9:05
We had stopped the RSAs at 8:00 (call for restart)
Time stamp computer stopped and started at 9:35
  114   Thu Apr 3 08:02:04 2025 Team PLEIADES (JG, ID, CJG, MC)DetectorsEntering ESR for PLEIADES
We are going to enter the ESR to check on the PLEIADES pocket detectors and install a nitrogen cooling.
  113   Thu Apr 3 07:59:09 2025 ZP, CN, IDGeneralScreenshots
Screenshots before opening ESR.
  112   Thu Apr 3 06:56:31 2025 JEL, ZNRunsScreenshots
  111   Thu Apr 3 06:33:08 2025 Zac, JohanGeneralBeam lost at 06:27, returned at 06:34
Spike in beam intensity at 06:27 (5x usual intensity) and then beam is lost. HKR says it's a problem with the magnet's power supply. Once the beam returned, the peaks are shifted to the left but are slowly shifting back into position.
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