Group Selection Page HELP DOC Controls Group Data Analysis Group ITDM WP76 DET Vacuum XRO EEE WP78 WP74 FXE SCS SPB MID HED SQS SXP Sample Environment Photon Commissioning Team Operation PSPO XO TS
OPERATION-2024 OPERATION-2023 OPERATION-2022 OPERATION-2021 OPERATION-2020 OPERATION-2019 SASE1-2018 SASE1-2017 Experiment data
  OPERATION-2024 logbook, Contact: F.Wolff-Fabris, A.Galler, H.Sinn  Not logged in ELOG logo
Message ID: 210     Entry time: 26 Nov 2024, 09:47
Author: Andreas Koch 
Group: XPD 
Subject: SA1 status 

Concerning damage of the SA1 FEL imager, Operation-2024 eLog #206

The screen position of the YAG screen - when pressing the screen selection button - has been moved by 1 mm so that the damaged area is out of the field of view, see attached screenshots (damage visible under visible light exposure).
The screenshots show the cross-hair, i.e. its nominal beam position and the circular damaged area at its original position of the screen and the new position.

More information on the damage can be found in the damage report, entry #35:
https://docs.xfel.eu/share/page/site/xfelwp74/document-details?nodeRef=workspace://SpacesStore/fd862f30-c6a3-4a5e-9a65-817cbcebb2d9
Also, there is a comment in ttfinfo: https://ttfinfo.desy.de/XFELelog/show.jsp?dir=/2024/47&pos=2024-11-19T09:39:31

Attachment 1: SA1_FEL_imager_-_damaged_spot_at_YAG_-_original_screen_position.png  580 kB  | Hide | Hide all | Show all
SA1_FEL_imager_-_damaged_spot_at_YAG_-_original_screen_position.png
Attachment 2: SA1_FEL_imager_-_damaged_spot_at_YAG_-_new_screen_position.png  571 kB  | Show | Hide all | Show all
ELOG V3.1.4-7c3fd00