Shift summary, posted by Erik Brambrink on 09 Sep 2023, 07:00
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Data taken from 11 to cryo failure
Beam conditions stable
Timing scan for different energy
Operation stopped
after cryo failure
Cryo jet was heated up then
Improvements of optical diagnostics (far field monitor)
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Shift summary, posted by Oliver Humphries on 23 Sep 2023, 07:59
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Shift summary from Monday 18th 7am until Saturday 7am
MONDAY
Aligned beamline until the beamstop. Macro for recovering mirror positions worked well. Minimal fine
tuning required.
Changed energy to 8.4 keV to align spectrometes on Ni kalpha emission.
Characterized focal spot of the x-rays at |
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Shift summary, posted by Motoaki Nakatsutsumi on 23 Sep 2023, 23:31
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During the morning shift (7am - 3pm), we couldn't take any meaningful data due to the issue of power glitch which caused the beam permission error
(AIBS) and down of SASE2 Karabo / Online-GPFS due to the lack of cooling in the rack room.
During the late shift (3 pm - 11 pm), after these issues were solved thanks to PRC/DOC/ITDM/EEE at 5 pm..., we could get back in operation relatively |
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Shift summary, posted by Konopkova Zuzana on 15 Oct 2023, 04:43
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the initial 600-700 uJ of pulse energy at the beginning of the user beamtime dropped down to 300-350 uJ over night from 14th to 15th. The operators
did not seem to be able to bring the pulse energy above 500 uJ, which is where it was after the RC's intervention in the morning. Is it possible to
bring up the energy in the morning?
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Experiment summary, posted by Konopkova Zuzana on 16 Oct 2023, 05:05
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Beam parameters: 18.8 keV, 350-600 uJ, 1 pulse
Experiment: Shock compression experiments using DiPOLE 70 J + XRD
- run through most of the users targets, largely succesful |
Issue, posted by Thomas Preston on 24 Oct 2023, 19:26 
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Vacuum issue at HED
At 18:26 the vacuum failed in the HED CRL3 chamber in the OPTs hutch. The vacuum failed in the section and tripped the valves in the OPT hutch;
it went from 1e-8 to 5 mbar in seconds. The leak is confined to the CRL chamber -- the sections upstream and downstream are not compromised and still have |
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Shift summary, posted by Konopkova Zuzana on 28 Oct 2023, 14:52
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Beam parameters: 18 keV, 1 pulse, 600 uJ
- user beamtime started Friday, the 27th and going smoothly until now and we are in data collection mode
- shock compression setup with XRD and DiPOLE |
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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 Peter Zalden on 02 Feb 2023, 09:25
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FXE bring-up, summary of shifts 31.1. and 1.2.:
Beam delivery (11.5 GeV)
9.3 keV, 1.5 mJ (31.1.)
7.1 keV, 1.7 mJ (1.2.)
Horizontal beam jitter 200 µm (RMS), a bit more than usual
Tunnel |
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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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Issue, posted by Yifeng Jiang on 07 Apr 2023, 23:57
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After receiving beam from SPB, we noticed that there is a werid shape of beam in the FEL imager which was not observed yesterday.
Maybe someone left X-ray component in the beam. |
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Issue, posted by Yifeng Jiang on 08 Apr 2023, 23:44
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| We notice that 0.5 mm Silicon ATT in SASE1 causes holo beam profile in FEL imager. Maybe this silicon att has been damaged. |
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Shift summary, posted by Fernando Ardana on 28 May 2023, 23:15
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User proposal 3273:
X-ray delivary
We use several deliveraly modes:
Continous single pulse
Continous 30 pulses
POD:
1 pulses / 30 pulses
All works fine, FXE is sastificed with X-ray delivery
DA:
Few |
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Issue, posted by Yifeng Jiang on 18 Sep 2023, 19:14
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We found that the x-ray pulse energy dropped a lot when we changed the undulator from 5.5 keV to 5.45 keV. We called BKR to optimise it (attachment
1)
=> There is a problem with the phase shifter of the undulator. It stacks sometime. If the x-ray intensity drops, we need to ask BKR to optimise |
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Issue, posted by Peter Zalden on 20 Sep 2023, 19:42
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Connerning the phase shifter adjustment after undulator gap scan via karabo:
At 19:30 FXE tested the scan change via Karabo with BKR. When the energy was changed with step size of 100 eV, the intensity of X-ray stays unchanged.
This means the phase shifter adjusment is corrrected and it is working now. |
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Issue, posted by Peter Zalden on 23 Sep 2023, 08:14
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FXE interlock in fault state. See photo attached with original error message from 6:53h. It cannot be reset by acknowledging. BKR is informed and they
are contacting MPS OCD. |
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Shift summary, posted by Peter Zalden on 24 Sep 2023, 09:16
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Summary for sept., 23rd
6:55 SPB just handed the beam over to FXE when the power glitch killed the interlocks and brought down ACC
11:30 After a lot of communication with PRC, Wolfgang Clement and DOC, the beam is back in SA1. We request change to 5.5 keV |
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Shift summary, posted by Peter Zalden on 24 Sep 2023, 09:24
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7:00 Power glitch during SPB operation - they were supposed to hand the beam back at 7:30h
Power glitch brought down FXE interlock system with beam stop monitor alarm that could not be reset
SA1 PPL running fine,
seems unaffected
9:10 Beam back in SA1, but still at 7 keV and cannot be changed by BKR to the req'd 5.8 keV, 94 kHz. |
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Jet alignment test- obeserver, posted by Jaydeep Patel on 29 Oct 2022, 11:03
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Nozzle type
Nozzle Aperture(µm)
Sample |
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Shift summary Feb 8th, posted by Jörg Hallmann on 09 Feb 2023, 01:11
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stable beam at 9kev (about 1.1 mJ)
checks of the sample environment required for the upcoming user experiment
test data aquisition of SiO2 samples (data analysis still ongoing) |