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  OPERATION-2024 logbook, Contact: F.Wolff-Fabris, A.Galler, H.Sinn  Not logged in ELOG logo
Message ID: 50     Entry time: 15 Mar 2024, 00:07
Author: Harald Sinn 
Group: PRC 
Subject: Issue 

SASE1 bunch number was reduced to 10 pulses for no obvious reason. 

Traced it back to a malfunctioning of the watchdog for the solid attenuator (see attached error message)

Deacttivated the watchdog for SASE1 solid attenuator. Re-activated it again.

Issue: SASE1 (SPB?) was requesting 200 pulses at 6 keV with full power with all solid attenuators in the beam. This was a potentailly dangerous situation for the solid attnenuator (!)

After that the team left to go home. Nobody is available at FXE.  Set pulse number to 1.

Checked status of solid attenuator. Seems that plate 1&2 have some vertical cracks (see attached picture)

 

 

Attachment 1: watchdog_error.jpg  118 kB  | Hide | Hide all
watchdog_error.jpg
Attachment 2: cracks_in_SA.jpg  78 kB  | Hide | Hide all
cracks_in_SA.jpg
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