SA3 status, posted by Frederik Wolff-Fabris on 31 Jan 2025, 12:43
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A ZZ is organized to happen now, 31.01 at ~12:40, in order to reset a cabinet belonging to one of the Apple-X undulators.
This is agreed with North Branch instruments and RC/BKR.
**Update 13:25: ZZ was successful; SA1 and SA3 beams restored at 13:25 |
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Shift summary, posted by Jörg Hallmann on 31 Jan 2025, 06:28
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Alignment of KB mirrors: focused beam H150-200nm x V300-350nm. Characterization of focused beam with wire scan.
Installed ePIX table
and ePIX. Thorlabs server is not running, needs to be fixed by controls during the morning shift
Aligned rotation center of SSRY and put the
beam into it. Moved alignment pin down by 10mm and put protecting cover on it.
Aligned DES spectrometer crystal (using YAG) to 9keV.
Checked |
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Shift summary, posted by Chan Kim on 30 Jan 2025, 23:08
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X-ray delivery
11.0 keV, up to 178 pulses at 564 kHz, 650 uJ.
Optical laser delivery
illumination and pp lasers
Achievements/Observations |
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SA3 status, posted by Frederik Wolff-Fabris on 30 Jan 2025, 13:59
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On 29.01 evening the SA3 pre-absorber was interlocked due to M5 mirror.
With the help of Maurizio V., it was found the M5 RY motor has to be driven to 400um position to release the interlock condition and permit beam
to SXP and SQS. This relates to a limit switch which was in a undesired location and about 1mm out of position. |
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SA3 status, posted by Andreas Koch on 29 Jan 2025, 09:08
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The SA3 FEL imager is now protected via the Big Brother server, which creates a beam limit on the bunch pattern server if necessary.
contact Andreas Koch, Lars Fröhlich for more details or consult the imager manual, section 2.9:
https://docs.xfel.eu/share/page/site/xfelwp74/document-details?nodeRef=workspace://SpacesStore/1766b430-7c48-4c46-bb2d-1774d69e1246 |
Issue, posted by Jan Gruenert on 19 Jan 2025, 11:46 
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1) BKR calls SUN11h20 and informs about issues with the SA1 SRA. Motors in ERROR.
2) Additionally, there was this morning a fire alarm, where in one rack (SASE1 rack 1.1 in XTD2) the gas extinguishing system was triggered,
see also https://ttfinfo.desy.de/XFELelog/show.jsp?dir=/2025/03/19.01_M&pos=2025-01-19T10:22:14 |
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SA3 status, posted by Andreas Koch on 14 Jan 2025, 07:38
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The image intensifier in the SQS Exit Slit imager had been exchanged on request of SQS, Thomas Baumann.
Model: Hamamatsu MCP C9546-03-Y001 against C9546-01.
The position of the YAG screen on the camera is slightly shifted which may slightly affect the spectral axis, a few pixels vertically, and approximately |