Shift summary, posted by Peter Zalden on 21 Mar 2024, 23:20
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User experiment transient grating, Cris Svetina. (LTP)
Used 7.12 keV from ACC with very good performance, above 4 mJ.
Collected pump-probe data on user sample
Sudden
timing jump of around 20 ps. Could not find out why this happened some time between 9h today and 18h.
Needed to add camera to DAQ. Solved this |
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Shift summary, posted by Raphael de Wijn on 21 Mar 2024, 06:33
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X-ray delivery
- 9.3 keV, >3 mJ/pulse, stable delivery
Optical laser delivery |
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Shift summary, posted by Peter Zalden on 20 Mar 2024, 23:15
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Preparation for user experiment transient grating, Cris Svetina
Used 7.12 keV from ACC with very good performance, above 4 mJ
Got spatiotemporal overlap with transient gratings using monochromatic
beam
One issue solved by DOC: Picomotors could not be scanned in karabacon, even though this worked well two/three weeks ago
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Shift summary, posted by Giuseppe Mercurio on 20 Mar 2024, 23:03
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Late shift summary
coarse timing
installed laser shutter on the laser
breadboard and I0 diode
exchanged camera of microscope to improve resolution
knife edge scans of FEL after BOZ
realized
that knife edge scans of OL cannot be done with present setup because OL cannot reach the diode in DIAG
Nahid prepared FeByP 1 liter, 30 mM
preparation |
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Issue, posted by Frederik Wolff-Fabris on 20 Mar 2024, 12:41
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BKR called PRC around 06:10AM to inform on vacuum issues at SA1 beamline leading to a lost beam permission for the North Branch.
VAC-OCD found an ion pump in the PBLM / XTD9 XGM presented a spike in pressure that triggered valves in the section to close.
After reopening valves the beam permission was restored; further investigations and monitoring in coming days will continue. Currently all systems |
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Issue, posted by Harald Sinn on 16 Mar 2024, 12:12
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11:15 SASE1/SPB called that they observed and issue with the SASE1 XGM/XTD2: about every 35 seconds the power reading jumps from 4 Watts to zero and
back. It seems to be related to some automated re-scaling of the Keithlyes, which coincides. The fast signal and downstream XGMs do not show this behavior.
The concern is that this may affect the the data collection later today. |
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Shift summary, posted by Chan Kim on 15 Mar 2024, 23:43
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**X-ray delivery**
- 6 keV, 3.2 mJ/pulse, stable delivery
**Optical laser delivery** |
Stability Issue, posted by Tommaso Mazza on 15 Mar 2024, 18:02 
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it is not clear why, but the beam position on BIU2 has changed over time, even more since we checked last. it is off in both directions
we see the GATT aperture projection drifting, so it is a change in the beam transport, not in the source.
see the beam, cut by the DIAG1 slit, compared to the cross it should be centred to. |
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Issue, posted by Romain Letrun on 15 Mar 2024, 07:08
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There are now two watchdogs for the XTD2 attenuator running at the same time
SA1_XTD2_WATCHDOG/MDL/ATT1_MONITOR020
SA1_XTD2_OPTICS_PROTECTION/MDL/ATT1
that are configured differently,
which results in different pulse limits (see attachment). |
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Shift summary, posted by Chan Kim on 15 Mar 2024, 00:16
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X-ray delivery
6 keV, 2.4 mJ/pulse, stable delivery
Optical laser delivery |
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Issue, posted by Harald Sinn on 15 Mar 2024, 00:07
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SASE1 bunch number was reduced to 10 pulses for no obvious reason.
Traced it back to a malfunctioning of the watchdog for the solid attenuator (see attached error message)
Deacttivated the watchdog for SASE1 solid attenuator. Re-activated it again. |
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Shift summary, posted by Chan Kim on 13 Mar 2024, 23:41
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X-ray delivery
6 keV, 2.6 mJ/pulse, stable delivery
Optical laser delivery
800nm PP laser, stable delivery
Achievements/Observations |
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Status, posted by Romain Letrun on 13 Mar 2024, 10:09 7x
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We checked the XTD2 attenuators following the intervention from XRO (compar ewith elog:37, before the intervention).
The wavefront shows similar distortions with the 75 and 150 um as earlier, which is not too surprising since the cracks are vertical.
Attachments 1-5: Beam on SPB_XTD9_SCR with XTD2 attenuator CVDs |
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Shift summary, posted by Marcin Sikorski on 05 Mar 2024, 07:41
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10 keV beam
Detector: JUNGFRAU in the burst mode (16 memory cells)
Achievements:
multiple sfx data sets (lysozyme)
with 4 and 8 pulses (at 1.1MHz) per exposure taken
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Issue, posted by Romain Letrun on 04 Mar 2024, 09:42
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The number of bunches during the last night shift kept being changed down to 24 by the device SA1_XTD2_WATCHDOG/MDL/ATT1_MONITOR020 acting on SA1_XTD2_BUNCHPATTERN/MDL/CONFIGURATOR.
This was not the case during the previous shifts, even though the pulse energy was comparable. Looking at the history of SA1_XTD2_WATCHDOG/MDL/ATT1_MONITOR020,
it looks like this device was started at 16:26:25 on Friday, 1st March. |
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Shift summary, posted by Raphael de Wijn on 04 Mar 2024, 06:52
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X-ray delivery
10 keV, up to 128 pulses with custom bunch pattern, 1.6-2.0 mJ
Optical laser delivery
NA
Achievements/Observations |
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Status, posted by Naresh Kujala on 01 Mar 2024, 17:11
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-Machine status
the cold compressor failure occurred at ~16.30hr today. And it will take around 35 hr to fix it. I will update via email (local contacts for
experiments) and Operation Elog tomorrow with more details. |
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Shift summary, posted by Romain Letrun on 01 Mar 2024, 10:54
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X-ray delivery
10 keV, up to 128 pulses with custom bunch pattern, 1.6-2.0 mJ
Optical laser delivery
NA
Achievements/Observations |
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Shift summary, posted by Jörg Hallmann on 01 Mar 2024, 06:30
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Shift summary (Feb 29th):
Stable seeding with 1mJ + 400mJ SASE
Alignment of Split and Delay Line |
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Shift summary, posted by Romain Letrun on 29 Feb 2024, 10:04
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X-ray delivery
10 keV, up to 160 pulses at 1.1MHz, 1.8 mJ
Optical laser
delivery |