Achievements

• Characterized optical laser spot at sample

Problems

• FEL beam had very unstable intensity and spectrum. As a result no useful data could be collected during the night
  • FEL pointing seemed to be stable on all tunnel imagers. The issue was communicated to BKR, and they said that things looked fine from there perspective.
  • Large fluctuations in spectral distrubtion at SCS spectrometer were observed. See video at https://syncandshare.xfel.eu/index.php/s/emtwonCsQJJqpz6
  • Oth-order beam on SCS pop-in showed large intensity fluctuations with ~50% of the time showing no beam at all