General Announcement:
- Martin Doering announces on the upcoming Winter Maintenance period:
1. Summary Task list was released last Friday 22.11;
2. A total of 10 working days is predicted for the WMP;
3. Dates for availability of Karabo, timing, DAQ, online storage were shown (selected period from Dec. 11 to Dec.18th);
4. Cooling water and technical gases maintenance (Dec.11th-20th);
5. Electricity: localized task in SA3 SCS exp. Hutch with installation of new emergency OFF button on January 15th: power will go OFF; Interlock tests light in all SASE hutches on January 15th;
6. In case of questions please contact xo-planning@xfel.eu
- As PRC, Jan G. mentions a full report for the weekend events is available at the Operations e-log:
1. events on Saturday limited SA1 and SA3 to a max of 30 bunches combined; caused by communication failure by the EPS - partially solved on Saturday but happened again on Sunday afternoon.
EPS loop was solved by replacing a communication terminal; The MOV loop relates to a terminal seemed to be burned (redundancy was working) – this needs to be worked on Tuesday's ZZ.
Limitation of 30 bunches came as communication was lost. Recovered after the work on Saturday and Sunday.
2. Broken bridges Karabo-Doocs went down on Friday evening: not caused a beam downtime but photon devices could not be seen at DOOCS.
A Desy CPU at the injector building failed and Tim Wilksen intervene to restore the bridge and will follow-up.
3. SRA slits and Filter are locked now until the ZZ on Tuesday or the WMP.
CTRL:
- Nothing to report.
DA:
- Nothing to report.
EEE:
- Issues in XTD2 (Sat and Sun) with PLCs and MOV loops: element had to be replaced to get back EPS on Sunday; Investigation for the cause are still ongoing.
- A new ZZ has to be done on Tuesday still related to the weekend events.
VAC:
- OCD involved on weekend activities to reset some EPS signals and ZZ.
XPD:
- Damaged YAG in SA1 XTD2 FEL imager was found during the weekend, to be worked in WMP.
DET:
- Nothing to report.
ITDM:
- Nothing to report.
XRO:
- Apart of the SRA issue reported in SA1, nothing else to report.
LAS:
- Not present.
UNSYS:
- Nothing to report.
SPB:
- Issue with detector motion limit switches; EEE will investigate.
- J. Gruenert says a downtime of 40mins happened due to a broken radiation interlock in SPB/SFX bringing down the machine. SPB/SFX will investigate the cause.
FXE:
- Thanks to OCD colleagues for the help during the weekend to restore full beam permission.
- Issues with gain acquisition with LPD happened and a ticket was created. Expert investigation is needed by EEE and DAQ.
MID:
- Nothing to report.
HED:
- Nothing to report.
SCS:
- Nothing to report.
SQS:
- Nothing to report.
SXP:
- Nothing to report. |