Shift summary, posted by Tokushi Sato on 18 Nov 2023, 06:42
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X-ray delivery
1.3-1.7 mJ, 10.7 keV, 1-100 pulses, stable delivery
Optical laser delivery
None
Achievements/Observations |
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Shift summary, posted by Tokushi Sato on 17 Nov 2023, 06:55
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X-ray delivery
1.3-1.7 mJ, 10.7 keV, 1-100 pulses, stable delivery
Optical laser delivery
None
Achievements/Observations |
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Shift summary, posted by Tokushi Sato on 16 Nov 2023, 06:56
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X-ray delivery
1.3-1.7 mJ, 10.7 keV, 1-100 pulses, stable delivery
Optical laser delivery
None
Achievements/Observations |
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Shift end, posted by Jayanath Koliyadu on 15 Nov 2023, 07:10
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X-ray delivery
1.3-1.7 mJ, 1-30 pulses, stable delivery
Optical laser delivery
None
Achievements/Observations |
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shift summary, posted by Loic Le Guyader on 13 Nov 2023, 07:16
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# Shift Summary
Achievements
- Measured elastic line with 3000 l/mm and 1000 l/mm grating on NiO sample |
Night shift summary, posted by Benjamin van Kuiken on 12 Nov 2023, 07:24 
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# Shift Summary
Achievements
- Found RIXS signal from CuO as well as off-resonant elastic line signals from NiO and CoO |
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SA2 status, posted by Jan Gruenert on 10 Nov 2023, 17:39
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End of 30 keV study
The machine finished their attemps for 30 keV tuning while using NEPAL injector laser, unfortunately unsuccessful.
They could not obtain lasing, and all the pulse energy shown during the day on the level of about 20 uJ was only background, no lasing (as |
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Euler MDL bugfix - motor velocities restored after stop, posted by Antje Trapp on 10 Nov 2023, 14:10
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The Euler MDL was updated, so that velocities are restored to standard values also after the stop button was hit before motion was finished.
Please be aware that due to the synchronized motion, which is neccessary to keep the beam on the screen, some motors may move for a longer time
with very slow speed (main reason - backlash compensation). We are working on a solution with a minimum speed. |
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KW44 - Leak in Solid Attenuator, posted by Janni Eidam on 07 Nov 2023, 15:57
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There was a leak in the Solid Attenuator that increased on Saturday morning when SPB moved the arm number 4 (see last entry ID 236).
We were lucky that a balance developed between the leak and the pumping of the ion pumps, so by setting the setpoints of the three most affected
ionpumps to 5x10-5 mbar we could survive the weekend and save the beamtime. |
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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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Issue, posted by Jan Gruenert on 05 Nov 2023, 12:47
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North branch down : another e-beam magnets problem
RC informs 12h45 that the linac and the south branch are back in operation and performance is as before the issues with the A21 quadrupole.
However, during the access to XTL, additional manget problems occurred in the T4 and SA3 section. |
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Issue, posted by Jan Gruenert on 05 Nov 2023, 12:18
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Accelerator down 9h23 - 12h
RC / BKR informs (10am), that due to a quadrupole power supply failure in A21 a tunnel access to XTL is required.
After the XTL intervention finished, BKR started beam in SA2 at 12h09. |
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Shift summary, posted by Angel Rodriguez Fernandez on 05 Nov 2023, 04:08
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stable SASE beam delivery with 1mJ pulse energy
we took data for different optical laser excitation fluences and delays
we
changed from the optical lock to the electronic lock to measure also longer delays.
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Issue, posted by Jan Gruenert on 04 Nov 2023, 13:49
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(Temporary) solution for the vacuum incident in SA1
This morning at 7h18 the vacuum interlock of SA1 closed the beamline valves and thus stopped the XFEL beam delivery for SA1 and
SA3. |
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Issue, posted by Jan Gruenert on 04 Nov 2023, 08:15
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Beam down for SASE1/3: SASE1 XTD2 vacuum issue
Vacuum interlock of the SA1 / XTD2 solid attenuator area triggered closing beamline gatevalves.
VAC-OCD is investigating. No beam possible for SA1/SA3 since 7h18. |
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Shift summary, posted by Johannes Moeller on 04 Nov 2023, 02:29
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Stable delivery of SASE at 18 keV. The intensity dropped slightly from 1mJ to 0.88mJ during the evening, but everything good.
fixed
the laser pulse-on-demand + FSSS scanning macro
We take some images series of the laser drilling process for different laser fluences
We
started to take first time resolved data
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Shift summary, posted by Johannes Moeller on 03 Nov 2023, 02:08
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stable 18 keV SASE delivery
measurement of siemens star in the morning
alignment of phase plate for the nano focussing
lenses
testing and debugging of the pulse on demand macro
holography test measurements and optimization of online analysis
alignment
of user samples
Problems: |
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Shift summary, posted by Chan Kim on 02 Nov 2023, 23:25
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X-ray delivery
19 keV, ~0.9 mJ/pulse, stable delivery
Optical laser delivery
no
Achievements/Observations |
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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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Shift summary, posted by Johannes Moeller on 02 Nov 2023, 02:28
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stable delivery of 1mJ SASE at 18keV
NAFO lens characterization with caustic scan
successful detector calibration of AGIPD
with LaB6 and alignment of Jungfrau to diffraction signal with LaB6
test of ptychography with 18keV (not successful)
successful setup
of online holography analysis with test measurements
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