Shift summary all week, posted by Martin Teichmann on 28 May 2023, 22:57
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we were trying to make THz and cross correlate this to the pump laser.
We managed to see THz and an auto-correlation with the pump laser therein. Unfortunately we did not see any THz generation using the FEL.
Problems: |
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late shift summary, posted by Loic Le Guyader on 06 Jun 2023, 23:11
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achievements
aligned the beam through up to the XOX imager
prepared FFT for reflectivity measurement
tested new DSSC gain files
for Tb M5 edge
problems |
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Morning shift summary, posted by Giuseppe Mercurio, Teguh Asmara on 07 Jun 2023, 15:04
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achievements:
FEL beam realignment because pointing was off since we had 0 pulses during the night
coarse timing was found
knife
edge scans of FEL to achieve twice the PPL beam size
problems: |
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Late shift summary, posted by Loic Le Guyader on 07 Jun 2023, 23:54
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achievements
setup spectral encoding of the transient reflectivity in FFT
determine coarse timing in the XOX
fixed BOZ_Z motion
and DSSC silicon oil pressure reading
problems |
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late shift summary, posted by Loic Le Guyader on 09 Jun 2023, 22:52
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achievements
try pumping STE membrane with FEL and detect THz emission with single shot EOS. No success.
tried cross-polarization for a
short time, no success either.
reduced the PPL chirp to record single shot transient reflectivity data versus BAM for the night.
issues |
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late shift summary, posted by Loic Le Guyader on 10 Jun 2023, 23:24
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achievements
checked coarse timing between FEL and PPL at XOX. It had shifted significantly
determined that light coming out of sapphire
from FEL was not heating but fluorescence
observed for the first time THz emission from STE from FEL pump on sapphire substrate and mesured |
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Night shift summary , posted by Robert Carley on 11 Jun 2023, 07:40
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achievements
optimized EOS signal from FEL-induced THz emission from STE on Sa of PAM
reduced chirp to increase timing sensitivity to 9fs
/ pixel of PAM
STE-based PAM measurements at fixed delay and delay scans.
after FEL down at 6am, continue with PAM measurements |
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Early shift summary, posted by Robert Carley on 11 Jun 2023, 17:34
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Achievements
Observed first EOS of THz emitted from FEL-pumped STE on SiC and Si membranes
Explored fluence dependence and damage limits
Explored
sample heating with pulse repetition rate
Measure timing jitter of FEL with and without longitudinal feedbacks engaged
Problems |
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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 27_07_23 night, posted by Sergii, Manuel on 28 Jul 2023, 06:38
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Achievements:
1. Beam in sample chamber, almost overlapping with ALAS
2. We saw signal on MCP and diode2 |
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end of shift summary, posted by Giuseppe Mercurio, Laurent Mercadier on 28 Jul 2023, 14:56
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achievements:
found new M2 bender position for focusing using blank
tried to use unfocused beam for ESLITS calibration, but could not see
it at SCSPopin, only at M5 Popin
we moved the XRD chamber laterally, closer to hRIXS, to be able to cut the beam using the sample at grazing |
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Morning Shift summary, posted by Giuseppe, Andreas on 30 Jul 2023, 18:35
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achievements:
calibration of exit slits
measurement of Cu L3 edge
moved hRIXS to nominal settings for Cu L3 edge
problems:
hRIXS motors could not be moved remotely, the problem was finally understood: GTZ had been moved manually into an interlock condition, |
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Night shift summary 30.07.2023, posted by Sergii, Martin on 31 Jul 2023, 01:42
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Achivements:
-We measured vertical spot size for several VFM settings
Problems: |
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shift summary, posted by Giuseppe Mercurio, Teguh Asmara on 02 Aug 2023, 06:44
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achievements:
beam transport with the second half of undulators closed
measured pulse energy in SCS hutch and verified that the transmission
of the beamline with hr grating is as previously reported
knife edge scans along vertical direction to find focus (<=11 um) and horizontal |
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night shift summary, posted by Giuseppe Mercurio, Teguh Asmara on 04 Aug 2023, 07:10
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achievements:
changed the LEPM to optimize resolution
found 140 meV
problems:
were not able to recover settings found because it is difficult to reproduce LEPM positions
plan: |
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late shift summary, posted by Andreas, Sergii on 04 Aug 2023, 23:20
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achievements:
hooked up sample cooling and reached 20K at sample at typical low consumption rate
we archieved targeted resolving power of
~10,000 or 86meV @ 857eV at low temp 20K after indications that heating broadens the elastic line of CoO
we observe sample damage at 30% and |
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Shift summary, posted by Ben, Justine on 05 Aug 2023, 15:33
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Achievements
Measured XAS and RIXS from NdNiO3 test sample at 230 K
Plan for next shift
Measure test sample at 20K
Find timing between X-ray and laser and look for transient signal
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Late shift summary 05.08.2023, posted by Sergii, Andreas on 05 Aug 2023, 23:06
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Achievements:
- Find course timing with antenna
-Find find timing signla with TR_XAS on the sample |
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Morning Shift Summary, posted by Ben, Justina on 06 Aug 2023, 15:55
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Achievements
Moved spectrometer to 1000 ln/mm and began alignment
Plan for next shift
Continue optimization of spectrometer with 1000 ln/mm grating
Problems |
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Late shift summary 06.08.2023, posted by Sergii, Andreas on 06 Aug 2023, 23:20
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Achievements:
-Re-alighned beam transport from the FEL soource as we seen low phon counts on the spectrometer
-Optimized spectrometer at 1000l/mm grating |