Status, posted by Naresh Kujala on 09 Sep 2023, 11:36
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- Due to the failure of the cryo cold compressor. The machine is down.
- Next update 9 pm today
Please do watch public display for status info. |
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Status, posted by Naresh Kujala on 09 Sep 2023, 15:03
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Info from Machine RC (Lars):
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Author: Froehlich |
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Status, posted by Jan Gruenert on 22 Sep 2023, 17:46
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SASE3 gas supply alarm
SCS called the PRC at 17h04 due to a loud audible alarm in XHEXP1 and contacted also TS-OCD.
It turned out to be the gas supply system for SASE3, an electrical cabinet on the balcony level in the SE-corner of XHEXP1.
Actions taken by PRC: |
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Status, posted by Jan Gruenert on 23 Sep 2023, 14:49
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Update of power outage aftermath
Achieved by now / status
SASE1
beam delivery and FXE operating fine (beam back since about 11h30)
SASE3
SA3
getting beam since about 11h30, again difficulties / no beam between 12h30 - 13h34, currently ok.
SASE3 Optical PP laser issues since the morning. |
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Status, posted by Jan Gruenert on 24 Sep 2023, 08:05
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8h05 Beam is switched back on in SASE2. HED ready for taking beam.
8h45 BKR is having problems to turn on SA2 beam. Not due to any
Beam actually went down in all beamlines today at 7:02 (for the records). |
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Status, posted by Frederik Wolff-Fabris on 14 Oct 2023, 09:48
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Machine went down overnight (4AM and 6AM) and could not be properly restarted by BKR.
Ongoing tuning is proceeding with RC onsite since 6AM; Instruments are informed and in direct contact to BKR.
Status 09:45AM: SA1 ~3mJ; SA2: ~500uJ; SA3 being restarted |
Status, posted by Jan Gruenert on 30 Oct 2023, 23:18 
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At the end of the MON late shift, the tuning status and obtained lasing pulse energies (ATT#1) are as follows:
SA1 at 19 keV : 660 uJ +/- 23 uJ
SA2 at 18 keV : 1073 uJ +/- 55 uJ
SA3 at
1.2 keV : 4330 uJ +/- 122 uJ
SD for a stable 2 min interval, fast XGM train average (INTENSITY.RAW.TRAIN) |
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Status, posted by Jan Gruenert on 02 Nov 2023, 19:37
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Typical delivery status during daytime during the week:
SA1 at 19 keV : 841 uJ +/- 41 uJ
SA2 at 18 keV : 990 uJ +/- 80
uJ
SA3 at 3.0 keV : 2900 uJ +/- 138 uJ
SD for a stable 2 hours long interval, fast XGM train |
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Status, posted by Jan Gruenert on 05 Nov 2023, 16:14
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Finally, we're completely back in operation,
and the performance is recovered in all beamlines.
See also ttfinfo, e.g. https://ttfinfo.desy.de/XFELelog/show.jsp?dir=/2023/44/05.11_a&pos=2023-11-05T16:01:25 |
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Status, posted by Jan Gruenert on 28 Nov 2023, 19:36
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Ramp down activities completed by XPD. References:
SASE1
https://in.xfel.eu/elog/SASE1+technical+commissioning/2204
https://in.xfel.eu/elog/SASE1+technical+commissioning/2205
https://in.xfel.eu/elog/SASE1+technical+commissioning/2206
SASE2
https://in.xfel.eu/elog/SASE2+technical+commissioning/1206
...until...
https://in.xfel.eu/elog/SASE2+technical+commissioning/1209
SASE3
https://in.xfel.eu/elog/SASE3+technical+commissioning/2220
https://in.xfel.eu/elog/SASE3+technical+commissioning/2221
The
XFEL photon beam was switched off as planned at 19h00 sharp. |
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Stability Issue, posted by Peter Zalden on 22 Feb 2023, 14:53
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Instability observed today at 14:05, reported to PRC and BKR, including RC: We saw RMS jitter amplitude of up to 4 mm at FXE imager. The jitter was also
seen by the upstream XGM with 100 um RMS amplitude. So it is something from the source.
This instability is suddenly appearind/disappearing and was absent over night and started this morning at 7h to occasionally turn on. It appear |
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Stability Issue, posted by Ulf Zastrau on 02 Mar 2023, 22:54
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HED would like to report that since 2 days the SASE2 beam is instable.
The attached movie shows, on the left (90° rotated, so up-down is left-right)
the beam at the end of the HED hutch, and on the right its the same beam |
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Stability Issue, posted by Tommaso Mazza on 24 Mar 2023, 18:27
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the pulse energy in XTD10 is lowered by ~30% when SASE1 changes photon energy, compare att. 1 and 2.
In addition, the intra-train pulse energy stability gets much lower. Potentially, there is an impact on the pointing as well, which is critical
for the pump-probe experiment. |
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Stability Issue, posted by Tommaso Mazza on 30 Apr 2023, 09:01
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changing SA3 mono from grating to blank while having the und to mono synchronization running apparently caused the und photon energy to change to 680eV.
the synchronization MDL went into pink-disable when changing mirror settings, so this change in photon energy should not have occurred.
After going back to 940eV, the SASE level did not come back. BKR tried to tackle this for some while until they asked for intervention of the |
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Solid attenuator arm 5 limit switch, posted by Antje Trapp on 30 Jul 2024, 10:38 6x
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On 27th of July, it was reported that arm 5 of the solid attenuator did not stay in 'out' position when retracted, but moved
in immediately again.
Reason was, that the limit switch for the 'out'-position did not trigger, and thus the actuator was in error state. Default for error |
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Shift summary: 19. July, posted by Mikako Makita on 19 Jul 2023, 20:09 8x
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Summary of today's activity:
Beam handover ~ 3pm.
SA2 mirror set tp B4C.
SA2 Rough alignment to MID & HED @ ~ 2-2.5 mrad ==> img 1, 4,
5 & 6
SA2 HED-Preabsorber position check with x-ray (working) ==> img 2 &3
SA3 M6 mirror Switch check (seems to be working)
SA1 |
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Shift summary, late 2023.03.15, posted by Robert, Manuel on 16 Mar 2023, 00:26
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Activities:
Found coarse and fine timing between FEL and PPL at 266nm
Set up for tr-RIXS during the night
Problems:
2 fastADC channels appear to be dead.
Optical locking of the PPL syncronisation system took a very long time (> 30 minutes)
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Shift summary, September 7 after nightshift, posted by Justine Schlappa, Guiseppe Mercurio on 07 Sep 2023, 07:24
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Achievements:
- Optimized hRIXS settings for OK edge at 145 deg scattering angle, resolution of about 50 meV
- Transferred the user sample |
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Shift summary of SASE2 alignment, posted by Antje Trapp on 20 Jul 2023, 18:20
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Mirror pitch motors Ry were tested after scaling was changed to um.
Tx and Ry motor positions were calibrated to their measured physical positions.
ALL PREVIOUSLY SAVED SETTINGS FOR SASE2 MIRRORS ARE OBSOLETE! |
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Shift summary of SASE1 alignment, posted by Kelin Tasca on 20 Jul 2023, 20:21
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Beam aligned to SPB Pop-In https://in.xfel.eu/elog/XRO+Beam+Commissioning/185
Beam aligned to FXE Pop-In https://in.xfel.eu/elog/XRO+Beam+Commissioning/187
Vibration tests: https://in.xfel.eu/elog/XRO+Beam+Commissioning/188 |