late shift summary, posted by Laurent Mercadier, Luigi Adriano on 17 Feb 2023, 02:24
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2 color mode
Achievements
Fluence scan
delay scan to identify cross talk of two colors
Optimized beam size
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late shift summary, posted by Laurent Mercadier, Giuseppe Mercurio on 22 Apr 2023, 23:32
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Achievements
Work on laser to improve the beam profile and reduce pointing. Apertured the beam upstream of focusing lens and changed to f=750 mm.
Significant improvement.
Characterized beam size, found positions of photodiode, antenna
Check coarse timing with reference
Aligned |
Issue, posted by Laurent Mercadier on 19 Apr 2023, 17:51 
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We report on an issue regarding the bunch pattern: The bunch pattern read by SCS_RR_UTC/MDL/BUNCH_DECODER shows 48 pulses, but we instead use 50 pulses.
Currently, we have a separate RF window and our 1st pulse Id is 2604. We operate at 2.2 MHz, and as required, 50 pulses. See attachment 1.
This means that the last two pulse Ids are 2700 and 2702. However, these values exceed the number of pulses allowed, and the way the bunch pattern |
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late shift summary, posted by Laurent Mercadier on 12 Jun 2023, 01:06
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Achievements
Optimized THz EOS, managed to observe single shot EOS trace with good SNR
Characterized chirp with different glass lengths
Ran
SiN spectral encoding in parallel
Issues |
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Shift summary, posted by Laurent Mercadier on 29 Sep 2023, 22:59
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# Late shift summary 29.09.2023
Laurent, Phuong
## Achievements |
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Night shift summary, 23.10.2023, posted by Laurent Mercadier on 23 Oct 2023, 06:46
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Late shift summary, posted by Konstantin / Lisa / Carsten / Rahul / Toma / Masruri on 22 Mar 2023, 17:07 7x
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22 Mar 2023, 17:08 started the log, the aim for the shift is the alignment of the sample and source point measurement. In addition to that, we also plan
to check the Greateyes camera.
22 Mar 2023, 17:53 continuing the sample alignment |
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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 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 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 |
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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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SPB beam alignment 1 keV 2 mrad, posted by Kelin Tasca on 20 Jul 2023, 18:17
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