Issue, posted by Jan Gruenert on 23 Nov 2024, 15:11 
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Damage on YAG screen of SA1_XTD2_IMGFEL
A damage spot was detected during the restart of SA1 beam operation at 14h30.
To confirm that it is not something in the beam itself or a damage on another component (graphite filter, attenuators, ...), the scintillator
is moved from YAG to another scintillator. |
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Issue, posted by Jan Gruenert on 23 Nov 2024, 10:27
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SA1 Beckhoff issue
SA1 blocked to max. 2 bunches and SA3 limited to max 29 bunches
At 9h46, SA1 goes down to single bunch. PRC is called because SA3 (SCS) cannot get the required >300 bunches anymore. (at 9h36 SA3 was limited
to 29 bunches/train) |
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Issue, posted by Jan Gruenert on 23 Nov 2024, 10:23
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Broken Radiation Interlock
Beam was down for all beamlines due to a broken radiation interlock in the SPB/SFX experimental hutch.
The interlock was brocken accidently with the shutter open, see https://in.xfel.eu/elog/OPERATION-2024/203
Beam was down for 42 min (from 3h00 to 3h42) but the machine came back with same perfomrmance. |
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Shift end, posted by Raphael de Wijn on 23 Nov 2024, 07:09
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End of in-house 8496
X-ray delivery
15.13 keV 30 pulses @0.5 MHz and 64 pulses (customized pattern), 0.85-1.0 mJ stable delivery |
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Issue, posted by Jan Gruenert on 23 Nov 2024, 00:48
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Broken Bridges
Around 21h20 the XPD group notices that several karabo-to-DOOCS bridges are broken.
The immediate effect is that in DOOCS all XGMs in all beamlines show warnings
(because they don't receive important status informations from karabo anymore, for instance the insertion status of the graphite filters nrequired |
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Issue, posted by Jan Gruenert on 23 Nov 2024, 00:36
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20h16: beam down in all beamlines due to a gun problem
20h50: x-ray beams are back
Shortly later additional 5 min down (20h55 - 21h00) for all beamlines, then the gun issue is solved. |
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Issue, posted by Frederik Wolff-Fabris on 15 Nov 2024, 10:50
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SA2 cell#5 undulator segment moved at ~09:45AM Fri to 25mm without aparent reason and undulator experts need a ZZ to exchange power supply; FEL
instensity dropped from 230uJ to 60uJ s consequence.
RCs are preparing south branch for the iminent ZZ. HED is informed. |
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Issue, posted by Frederik Wolff-Fabris on 12 Nov 2024, 10:07
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- While FEL IMG with YAG screen was inserted in SA1, EPS/MPS was not limited to the expected 2 bunches, but to 30 bunches;
- It was found
the condition #3 ("SA1_XTD2_VAC/Switch/SA1_PNACT_Close") at the EPS Mode-S was disabled which should be always enabled;
- Condition
#3 has been enabled again and now SA1 is limited to 2 bunches, as expected when YAG screen is inserted.
Further investigations will be done to |
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SA2 status, posted by Frederik Wolff-Fabris on 04 Nov 2024, 15:07
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Dear MID colleagues, Svitozar (PRC), Bolko and Shan (RCs),
This morning we faced the situation where MID was limited to 400 pulses (mode M) via the EPS signals. The current RF window set at the machine
allows to the requested 450 pulses. |
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Shift summary, posted by Raphael de Wijn on 03 Nov 2024, 00:00
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X-ray delivery
12.5 keV, ~1.6 mJ
Achievements/Observations: |
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Shift summary, posted by Ulrike Boesenberg on 31 Oct 2024, 02:43
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12.389keV, HXRSS, 1-400+ bunches, 450uJ
Seeding alignment
Beamline alignment (Mirror + foccussing)
Measured energy and moved it the requested value
Cryos
for sample and monochromator are prepared
Aligned DES spectrometer
Started with DCCM characterization (440)
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SA1 status, posted by Peter Zalden on 28 Oct 2024, 09:58
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This is to report some findings during operation that should be looked into (mostly to avoid in the future, because both negatively affect data quality
of the user expt at FXE):
At the moment, the 99:1 mode affects 4 to 5 pulses out of 100 in SA1, see first screenshot that shows in the top right the IPM reading |
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Shift summary, posted by Chan Kim on 25 Oct 2024, 05:51
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X-ray delivery
12.4 keV, ~1.4 mJ
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Shift summary, posted by Chan Kim on 24 Oct 2024, 06:51
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X-ray delivery
12.4 keV, ~1.4 mJ
Achievements/Observations
Beam is through the inline mic
Flight tube vacuum optimized
Beam trajectory up to JF4M manually optimized
EHC |
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Status, posted by Naresh Kujala on 07 Oct 2024, 16:34
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Desy Laser group has fixed the issue about the laser Synchronization.
https://ttfinfo.desy.de/XFELelog/show.jsp?dir=/2024/41/07.10_M&pos=2024-10-07T14:51:12
Naresh |
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Issue, posted by Naresh Kujala on 07 Oct 2024, 15:15
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14:40hr
FXE and HED reported the laser synchronization issue. Informed to Machine RC.
LbSync team couldn't fixed this issue remotely and on there way to Schenefeld to fix this issue. |
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Shift summary, posted by Tokushi Sato on 01 Oct 2024, 02:39
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X-ray delivery
6 keV, ~2.8 mJ, continuous beam drift in both direction
Optical laser delivery |
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Shift summary, posted by Jörg Hallmann on 30 Sep 2024, 01:50
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01:49
Worked on the XPCS analysis packages |
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Shift summary, posted by Chan Kim on 30 Sep 2024, 01:13
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**X-ray delivery**
- 6 keV, ~2.8 mJ, continuous beam drift in vertical direction (both XTD2 & XTD9 XGMs)
**Optical laser delivery** |
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Stability Issue, posted by Chan Kim on 29 Sep 2024, 22:29
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X-ray beam is continuously drifting in the vertical direction (XTD9_XGM)
It affects our NKB focus and focused beam is also drifting continuously. |