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  OPERATION-2023 logbook, Contact: F.Wolff-Fabris, A.Galler, L.Samoylova, H.Sinn  Not logged in ELOG logo
Message ID: 359     Entry time: 23 Sep 2023, 08:50
Author: Jan Gruenert 
Group: PRC 
Subject: Issue 

Updates on power glitch

8h50 No feedback from TS-OCD (still not arrived at SASE3 / SCS ?). Phone is busy. Apparently they are busy working on it in the hall (confirmed at 9h00).

There is a PANDORA radiation monitor which has no power, but it is needed to resolve the interlock issue in FXE + SCS

Important:
regular SCS phone cannot be reached anymore (no power). Please use this number instead to call SCS hutch: 86448

Update 9h15
- SXP/SQS informed by email, SQS informed / confirmed by phone (Michael Meyer), they will check their hutch and equipment. No phone contact to SXP.
- FXE info: power back at PANDORA but interlock error persists

Beam is back to SA2 / XTD6 since 7h35.

9h20 Info by TS-OCD / Christian Holz: power at SASE3 area in hall is now back.

9h25 FXE:
The affected Pandora without power was PANDORA X05 in the SASE3 SXP hutch.
That PANDORA now has power back, but the FXE hutch interlock error is still persisting.
D3 Wolfgang Clement is informed and said he might have to come in to take care of the alarm.

9h40 info RC: 
"new" problem, now SA2 : Balcony MPS crate SA1 balcony room , communication lost to "DIXHEXPS1.3 server  - MPS condenser"

09:55 info FXE:
Wolfgang Clement was at FXE and has reset "all the burnthrough monitors", in total 5 units, "including also SXP and SPB optics". At least at FXE the X-ray interlock is now fully functional, confirmed.

10:05 Info SCS:
their interlock panel this shows an error, but which probably just has to be acknowledged. FXE / SCS will communicate and solve it.

10h35 BKR info:
AIBS in all hutches of SA1/3 are blocking beam. Also DIXHEXPS1.3 is blocking beam to SA2. see att#1 and att#2.

11h10
EEE-OCD is working on AIBS / MPS from PLC/karabo side.

11h25 EEE-OCD:
PLC errors cleared for all AIBS.

11h30
beam to SA1/3 should be possible now. SA2 still blocked. The MTCA crate apparently needs to be power cycled.
EEE-Fast Electronics OCD is infomed through DOC.

12h00
EEE-PLC-OCD has succeeded to clear errors on the karabo/PLC side of AIBS. Now beam to SA1/3 is re-established.
However, the MTCA crates XFELcpuDIXHEXPS2 (and XFELcpuSYNCPPL7) might have power but are not operational (MCH unreachable) and must be locally power-cycled.
These are "DESY-operated" crates, not "EuXFEL-MTCA-crates".
Nevertheless, DOC staff with online instruction by EEE-FE will go to the balcony room and reboot crates locally as required/requested by RC. Hopefully this will bring us back beam permission to SA2.

12h10
Another new issue: SA2 karabo is down. DOC is working on this. No control possible of anything in SASE2 tunnel via karabo. 
PRC instructs BKR to close the shutter between XTD2 and XTD6 (as agreed also with HED) for safety reasons, so that the beam won't be uncontrolled once SA2 gets beam permission back.

12h45 info from SCS:
a) the SCS pump-probe laser is down since the morning (and they absolutely need this for the experiment), they are in contact with LAS-OCD, but LAS-OCD waits DOC support to recover motor positions etc.
b) SCS received XFEL beam at 11h30 but since 12h33 the beam is intermittently interrupted (see att#3) or completely off. BKR informed but interruptions not yet understood.

12h50
The crate XFELcpuDIXHEXPS2 appeared to be revived. It reads OK on the DOOCS panel Controls--> MTCA crates --> XHEXP, but after some moments again in error (device offline).
Info RC: Tim Wilksen / DESY and team are working on this from remote and might come in if broken hardware needs to be exchanged.

13h40
SCS had reported 12h45 that beam is always set to zero. SCS and PRC investigated but couldn't find any EPS / karabo item that would do this.
We suspect that some karabo macro is asking to set the beam to 0 bunches but cannot find anything.
We then disabled the user control of the number of bunches from BKR. Now SCS receives beam but has to call BKR if they want to change the number of bunches. To be followed up by DOC once they have time.

14h20
I see now that the crate suddenly is OK, which probably means that it was finally cured by somebody. Beam permission to SA2 is back.
 

14h40
Beam is back in XTD1 (SA2) until the shutter XTD1/XTD6 and checked. Currently 300uJ.
Beam monitoring without karabo is possible in DOOCS with XGM (unless vaccuum problems would come up) and the Transmissive Imager.
Now the HED shift team is leaving until DOC has recovered karabo. Info will be circulated to HED@xfel.eu when this is achieved.

 

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