HED summary 25.3., posted by Lisa Randolph on 25 Mar 2023, 21:01
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This day we had lots of issues.
Nightshift noticed that the mirror 2 feedback was not running anymore since about 22hrs; PBLM2 cam was unknown; powercycling recovered
the camera, feedback operational again.
Continued shooting until ~9:00
At ~9:30 the whole Karabo, online cluster were dead. No control |
Summary day shift 2023-04-04, posted by Lisa Randolph, Carsten Baehtz, Alexander Pelka on 04 Apr 2023, 07:11 
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04 Apr 2023, 07:44 we realize that the SetpointsHED Macro lost all values, probably during the Karabo Crash. Since it is a macro, the values arent stored
anywhere. DOC tries to recover. Meanwhile, we found the values for 3mrad, 2.5mrad and 2mrad in old screenshots and update the macro values from that. Saving
those now locally in nextcloud/user/Alex. |
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HED Shift Summary 07.04., posted by Alejandro Laso Garcia on 07 Apr 2023, 23:00
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Morning - Users from proposal 3455 continued with their measurement program. Beam stable during the measurements.
Afternoon - Changed the setup from 3455 to 3326.
Evening - Beginning of the alignment for users. Beam stable. |
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Shift summary HED 2022-0, posted by Motoaki Nakatsutsumi on 09 Apr 2023, 00:03
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9.752 keV, self-seeding, 700-800 uJ. Intensity is very stable, ponting is also much stable than usual. very good beam.
Beamtime #3326 - Axion search.
Successfully aligned two Ge crystals to Laue conditions (Rocking curve width ~0.002 deg) . Found Laue reflections after 2 crystals on Jungfrau |
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HED Full day shift summary 25.04., posted by Alejandro Laso Garcia on 26 Apr 2023, 07:55
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Morning shift:
- First thing in the morning ~7 am, the MDL in the SASE 2 topic were down. Even the watchdog which prevented us from moving SA2 attenuators.
DOC quickly resolved the issue (10 min). |
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HED Full Day Summary 26.04., posted by Alejandro Laso Garcia on 27 Apr 2023, 07:51
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Morning shift:
- Tried to align the fiducial fiber in IC1 for the streak cameras, however it was unsuccessful.
- The karabo device for the SOP had to be restarted. Crosschecked that all the timings were still correct. |
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Shift summary, posted by karen appel on 10 May 2023, 09:51
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for 9th of May - 10th of May: user experiment 2740 , first users with DIPOLE100-X long pulse laser
Took beam at 18 keV with roughly 450 muJ
M1 and M2 Mirrors on Pt stripe, M3 on B4C and with Tx = 4 |
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Shift summary, posted by Konopkova Zuzana on 11 May 2023, 05:07
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beam parameters: 18 keV, 1 pulse on demand, 400 uJ
achieved:
VISAR calibrations
timing between X-rays, VISAR laser and DIPOLE laser
main shots with DIPOLE energies up to 35 |
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Shift summary, posted by Konopkova Zuzana on 01 Jun 2023, 12:10
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X-ray parameters: 20 keV (20080 eV from HIREX), 352 pulses, cca 250 uJ
changed setup to diamond anvil cell experiments with laser heating
installation of AGIPD detector
running user
samples, mostly carbon materials to constrain the phase diagram of carbon at high pressures and temperatures.
experiment going overall |
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Shift summary, posted by Thomas Preston on 03 Jun 2023, 09:42
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X-ray parameters: 20 keV, 352 pulses, ca 300 uJ
running user samples.
experiment going overall well.
X-ray performance: |
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Pulse energy has dropped to ~50% from this morning, posted by Thomas Preston on 03 Jun 2023, 13:42
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03 Jun 2023, 13:46
We called the BKR to ask what they can do about our pulse energy being 50% (~160uJ and slowly dropping) of what it was since we made our hutch
intervention (with 0 bunches). BKR were asked to organise a time slot with PRC and the other instruments to make an intervention to try to increase our |
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Shift summary, posted by Konopkova Zuzana on 04 Jun 2023, 14:53
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beam parameters: 20 keV, 300 uJ, 352 pulses
continuation of user programe.
Machine performance very good for trying the 20 keV the first time. Experiment also going well.
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Shift summary, posted by Konopkova Zuzana on 13 Jun 2023, 23:08
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beam: 18 keV, 352 pulses, ~200 uJ per pulse
achievements:
AGIPD timing scans, AGIPD darks.
beam alignment, CRL3 focusing, prep for the user beamtime
beam conditions: |
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Shift summary, posted by Konopkova Zuzana on 15 Jun 2023, 06:41
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18 keV, 150 uJ per pulse, 2.2 MHz
continuing user program proposal 3285
X-ray heating and laser heating samples in DACs
using only the first 200
pulses of the train as the intensity after decreases fast, conversion of the samples is difficult due to low pulse energies
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Shift summary, posted by Konopkova Zuzana on 17 Jun 2023, 07:27
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Beam 18 keV, 0.5 MHz, long trains up to ~280 pulses
change setup to dynamic DAC
prep for user beamtime: alignment of X-rays, focusing (~40 um), train-on-demand for long trains,
transmission runs
darks, XRD calibrations for AGIPD
Issues: |
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Shift summary, posted by Konopkova Zuzana on 19 Jun 2023, 05:34
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concluded user experiment on dynamically compressed water
long train operation worked relatively stable with no major interuptions
in beam delivery
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Shift summary, posted by Konopkova Zuzana on 19 Aug 2023, 06:20
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beam parameters: 7.7 keV seeded, 2.2 MHz, up to 20 pulses, 150 uJ/pulse
user program, measuring IXS spectra of plasmons with high resolution using seeded beam and monochromators
mono (re-)alignment
to minimize the SASE pedestal of the seed. Need to search for good position of the beam on the crystals as with just a slight change in pointing, the transmission |
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Experiment summary, posted by Konopkova Zuzana on 21 Aug 2023, 04:31
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beam: 7.7 keV seeded, ~300 uJ/pulse, 2.2 MHz, 20 pulses
user experiment finilized, IXS scans on Si, Al and Cu at different momentum transfer angles
measurements of plasmons in cold
material only
pulse energy increased slightly, however it is mostly in the SASE pedestal which is insufficient to caramelize the electrons into |
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Shift summary, posted by Oliver Humphries on 05 Sep 2023, 22:33
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Received the beam from day shift, aligned to beam stop (low signal due to 4m air scatter, only 700uJ upstream)
ZYLA5 camera was
having issues, restarted without rotating to limit dropped trains.
1.2mm CVD solid attenuator in SA2 seems to be damaged
We
have trouble with our SEPS interlock after changes last week
We are supposed to be able to close the shutter (upstream of CRL3) without removing |
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Shift summary, posted by Erik Brambrink on 08 Sep 2023, 06:22
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Improved the alignment procedure:
Using the pin to make sure of the spatial overlap
SAXS signal is used to make sure
the pin is well centered on the X-ray beam path
YAG is only used in combination with ILM to fix with ~5 um precision the height of the beam
(moving CRLs on laser focus) and the temporal overlap.
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