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  OPERATION-2023 logbook, Contact: F.Wolff-Fabris, A.Galler, L.Samoylova, H.Sinn  Not logged in ELOG logo
Message ID: 87     Entry time: 18 Mar 2023, 01:45
Author: Johannes Moeller 
Group:  
Subject: shift summary 
  • stable HXRSS delivery at 8.99 keV, 1 bunch. XGM intensity during the day decreased from 750 uJ to 600 uJ.
  • Vacuum in sample chamber stabilized with cold trap and full beam path opened to AGIPD and endstation
  • Again problems with smaract stages in DES, but imager in a good position to continue.
  • First scattering data recored from water jet. Unknown, bimodal intensity distribution
  • Focus characterization of SDL lower branch with knife edge, X-ray eye and SAXS speckle data. Larger (>10 um) as compared to direct beam with same focussing setup.
  • Clear influence of splitter insertion on beamsize observed. Beam is smaller without splitter crystal.
  • Current status: Alignment of upper branch unfinished, X-ray eye inserted, sample chamber vented

For the next shift:

  • Finsish alignment of upper branch
  • Characterize both beams in size with Xray eye. Try if slightly different lense combinations or M2 bender settings improve the situation.
  • Overlap both beam on the sample
  • Possibly insert upstream pinhole just in front of jet to clean up and ensure overlap
  • Take data, enjoy
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