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  OPERATION-2023 logbook, Contact: F.Wolff-Fabris, A.Galler, L.Samoylova, H.Sinn  Not logged in ELOG logo
Message ID: 145     Entry time: 20 Apr 2023, 02:26
Author: Wonhyuk Jo 
Group:  
Subject: Shift summary 

Achieved

  1. Brought the 800 nm of optical pump laser to the hutch after the intervention. 
  2. Found the rough spatial and temporal overlap between the X-ray and pump laser with MID X-ray eye. 
  3. Found the sufficient photo-induced effect on the user sample (HfN) with one unpumped X-ray pulse and 12 pumped X-ray pulses. 
  4. Installed the lambda/2 wave plate and controlled the optical laser polarisation at the sample surface.
  5. Bragg peak analysis via Extrafoam provides an intuitive and prompt result during the measurement, which is very useful for deciding the following procedure of measurement. 
  6. A measurement scan for 3D reciprocal mapping has been collected using the Karabacon macro for varying the time delays and omega angles.

Issues

  1. The Jungfrau detector dropped approximately 60% of trains in the saved data.

Report

  1. The optical pump laser was not able to be brought to the first X-ray pulse. The first unpumped X-ray pulse data is used as a reference, which is useful to this experiment. 
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