UPDATE:

XTD2

The Upstream sector is back into operation.

The Downstream one is still out of order since the turbopumps are whether in error or in an unknown/un-instantiated status.

XTD9

Upstream sector is back to full operation

Downstream sector: only one of the turbos is running. The other one P11280T cannot be reset

Right now that is the only thing I can do.

 The interlock definition for complete isolation of the whole section based on high pressure signal has been successfully tested. 

DPS (Upstream and Downstream) are now fully "controlled" by Karabo.

XGM has been reported by J. Grünert that it will be re-integrated during the evening.

Still some problems to call the remote operation of the turbopumps from Karabo, but it doesn´t compromise any of the interlock definitions (only is troublesome if the one needs to work with the pump, for instance after the interlock has been triggered).

 Dear all, 

contrary to the rumor that I spread last Tuesday in the PBS meeting, the magnet tests in XTD2/4 will be NOT done coming Monday and therefore the XTD10 will be be NOT open. It is still the plan to have one access day in XTD10 per week in the future (Monday or Wednesday to be clarified with the magnet group), but this will start only later this month.

Best regards

Harald 

The SASE3 tunnel XTD10 was searched by Janni and her team and interlocked about one hour ago.

It is now almost ready for first lasing in SASE3:

• The vacuum is completely connected and closed from V0 all the way to the end
• All valves, pumps and gauges are included in the PLC loop and can be controlled from Karabo
• The gas attenuator section was completely tested and is also under PLC control. The turbos are isolated from the rest of the vacuum and put into a safe state
• All three DPS's are operational, tested and included
• All imagers are operational
• The XGM vacuum is part of the general vacuum and controlled and monitored from KARABO
• The interlocks of the DPSs were succesfully tested

In order to allow beam, it is estimated that one access with approximately 8h would be needed to sort out some remaining smaller issues

I would like to thank the entire team from Vacuum, Optics, Diagnostics, AE and CAS for the big effort and in particular C. Youngman for coordinating.

Dear all, 

according to the DESY logbook XTD10 will be opened today again: See DESY logbook entry:

'due to the cryogenic failure we will open XTD10 from 9am for working.
at XTL and XTD2/4 ZZ is possible for repairs/work.'

I don't know hoe severe the cryo failure is, but otherwise the agreement is that XTD9 will be closed Friday morning around 9am.

(I assume that they may close Friday morning also XTD10 again).

Best regards

Harald  

Info from BKR:  the southern tunnels were opened, thus XTD1 can be accessed now.

 The XSDU2  area will be open (as XTD2) tomorrow between 9 ans 12. To register the access, please send also in this case a mail to T.Haas.

Both SASE1 XGMs (in XTD2 and XTD9) are now again in the Vacuum Control Loop, their vacuum being controlled by Beckhoff/karabo. This works fine.

Therefore: DO NOT FOOL AROUND WITH THE VACUUM LOOP !

Since we all cannot enter the tunnel XTD2 in the next two days, it's agreed that the Vacuum Loop is NOT going to be touched at all, since  we cannot intervene in the tunnel if something goes wrong.

XGM status 21.4.2017

During Easter break, the two XGMs in the control system (XTD2+9) had no issues.
XGM@XTD10 however had an issue: tuesday morning it was found that all pumps had stopped. The scroll pump showed an error. UPS apparently had excess load sunday evening 19h30 but couldn't send email (network error). Possibly vented with tunnel air up to 10mbar since that time. Investigation is ongoing.

Thursday enabled DOOCS pressure reading of XGM in XTD10, UPS rechecked

System surveillance on coming weekend: Jan and Theo 1 day

Other remarks:
- WP74 staff have received their dosimeters for ZZ access if required
- some automatic monitoring and info system is needed soon, e.g. karabo to NAGIOS connection

All devices went into unknown state in the karabo XGM scenes in XTD2 and XTD9 at 19h52.

Pressures INCREASE since then (as measured/shown in DOOCS):

XTD2:  2,5E-7mbar and rising

XTD9:  7,7E-7mbar and rising

Please respond now !! We are still in but want to go home !

Presentation for SASE1readiness-Meeting

on XGM resistor issue progress (w5) and plan (w6)

This is the current (w5) progress at DESY concerning the analysis of the serious XGM resistor issue (summary; a detailed report by DESY is available):

• The new “pulser test” was verified at an operational XGMD at FLASH. The test method is (unfortuately) OK. This means that the test results with issues from last week on all our XGMs are REAL.
• 25% of all resistors in XBPMs affected, 0% of resistors in HAMPs affected, no capacitors affected.
• Since no HAMP resistors are damaged, damage by environmental conditions (venting, humidity etc.) can be excluded. The main differences to the affected resistors are the HV-conditioning and the experienced HV-values of the resistors (typically XBPM resisotors are tested up to 12kV, HAMP resistors each see much lower voltages).

• An XGMD chamber at FLASH was tested-to-destruction-of-resistor by applying a large differential voltage (>3kV) between neighboring electrodes, e.g. on mesh_e and FC_e. These resistors (Caddock MS220) have a nominal voltage breakthrough rating of ~500V but never had issues. They are used in all our XGMs.
• New, other resistors (Ohmite MOX-1N-13) with higher voltage breakthrough rating of 10kV were procured and arrived tuesday
• The new resistors were built into the tested-to-destruction XGMD at FLASH, unit is now pumping, will be retested with applying pulsed HV (on both Caddoc and Ohmite resistors) when at suitable pressure.

Further plan (w5end + w6) concerning the XGM resistor issue:

• If the new resistors survive the test, then next monday the XGM01 at HERA-S will be opened, the tested-defect resistors will be checked and replaced with the new resistors.
• If all tests on XGM01 are then ok including an acceptable RGA, all other XGMs (XBPM chambers) will be opened and resistors exchanged. Even ok-tested resitors would be exchanged to avoid future unexpected failures. HAMP chamber resistors will not be exchanged (large number >20 of resistors, no failures).
• If the RGA is not acceptable, the resistor Ohmite MOX-1N-16 is another alternative, but has increased delivery time.

Post on behalf of Jan Grünert:

Wiring status SASE 1:

Wiring progress:

• Internal wiring of the XGM in XTD 9 is done.
• Vacuum part wiring of the XGM in XTD 9 is done (ready for local Beckhoff test).
• Gas Panel wiring of the XGM in XTD 9 is done.
• Crate wiring (ADAM & Femto crate) of the XGM in XTD 9 is done.

Upcoming work XTD 2:

• Serial connection from Beckhoff to TCP 350.
• Change cold plug cables into halogenfree cables.

Upcoming work XTD 9:

• INHIBIT connection Iseg HV crate.
• Serial connection from MTCA to RVC 300.

Upcoming work XTD 10:

• Vacuum part wiring of XGM.
• Gas Panel wiring of XGM.
• Internal wiring of XGM.
• Installing ADAM & Femto crate.
• Measure cable lengths for Imager and prepare cables.

Die Arbeiten an der Kühlwassersteuerung konnten innerhalb des genannten

Zeitraums abgeschlossen werden,

so dass die Kühlwasserversorgung nun schon einige Zeit wieder geregelt

läuft.

Großer Dank an alle Beteiligten, die den Ablauf der Abschaltung meines

Wissens auswirkungsfrei gestalten konnten.

Wir bitten über kurze Rückmeldungen zur Optimierung, sollten

Schwierigkeiten im Zusammenhang mit der Abschaltung entstanden sein.

Mit freundlichen Grüßen

Jörg Hanik

- MCP detector - vacuum to HV crate interlock (inhibit) needs to be connected - Beckhoff crate is prepared - missing cable from MPOD to Beckhoff terminals.

SASE1 / SASE3 readiness --- WP74

2017-07-14

SASE1: 

• commissioning of Kmono started yesterday at 10h for some hours
• Kmono will be used for undulator commissioning as soon as Kmono is commissioned itself, and machine is ready for this
• Support to SASE tuning given to machine (ongoing)
• Maybe today: support during SASE gain studies
• During last week (service week) : GLT-Anbindung XTD2 established

SASE3:

• During last week shutdown : 
  • progress on DP installation, XGM cabling almost done, much imager and timing cabling done
• When XTD10 is closed (as now) we currently cannot do much because there is no PLC loop in SASE3.
• Non-Beckhoff technical commissioning started (e.g. some progress on MPOD HV-power supply)
• WP74 must do a lot of technical commissioning in XTD10. Our work is by far not done when all our vacuum screws are tightened. There are different WP74 components in XTD10 than in SASE1 (not just a simple copy). WP74 requires the Beckhoff loops for tech. commissioning.
• Alignment of DP „islands“ to be done in next shutdown.
• Planned for next shutdown: installation of PES in XTD10, finishing of cabling