Late shift summary20.04.2023, posted by Robert Carley on 21 Apr 2023, 04:05
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Activities:
correctly positioned magnet
moved detector upstream and found small beamstop
Recorded SAXS
Started tr-SAXS
Problems:
The SAXS images from laser-excited samples showed unexpected variation between different size rings, central point (ie not a ring) and |
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Night shift summary 20-21.04.2023, posted by Robert Carley on 21 Apr 2023, 04:13
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Activities:
Investigated SAXS scattering instability and found it to come from the pointing variation of the PPL
Recorded microscope images
of the PPL spot of the pBN to quantify the pointing for different spot sizes
Enlarged the beam and measured pumped SAXS. Results seem better |
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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 |
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last late shift UP3463, posted by Giuseppe Mercurio, Laurent Mercadier on 23 Apr 2023, 23:38
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Achievements
Beam transport
Coarse and fine timing
XAS on Co
Aligned HSLIT, pinhole, camera beamstop
Characterize
FEL beam size and position on curved grating
PPL Power measurement
Fluence scan on sample of optical laser and FEL to determine good |
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night shift summary and end of beamtime, posted by Andreas, Martin on 24 Apr 2023, 15:16
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achievements:
- finished SAXS data recording till 8am on time-resolved skyrmion nucleation and field dependence
- the setup is sensitive to beam transport drifts due to the closed hor-SLIT and the pinhole in FFT. were able to recover beam intensity by simple |
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night shift summary and end of beamtime, posted by Andreas, Martin on 24 Apr 2023, 15:16
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achievements:
- finished SAXS data recording till 8am on time-resolved skyrmion nucleation and field dependence
- the setup is sensitive to beam transport drifts due to the closed hor-SLIT and the pinhole in FFT. were able to recover beam intensity by simple |
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Late shift sumamry 03.05.2023, posted by Sergii Parchenko on 04 May 2023, 00:52
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Achivments:
- X-ray and Laset spot size calibration
- Course timing check |
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morning shift summary, posted by Loic Le Guyader on 04 May 2023, 14:34
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achievements
we change the DSSC timing to record the first pulse
sample was getting damaged with 26mJ/cm2 and scattering of the sample
was changed so we used lower fluence to observe t0 on the sample
changed to 2nd mono order, 20% GATT transmission and exit slit to 0.3 mm. The |
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Late shift summary 04.05.2023, posted by Sergii, Phuong on 04 May 2023, 22:58
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Achivements:
-Cooling down the sample. Sample is at 14K
-Taking time resolved data at 70% 800 nm, -5 ps - 65 ps |
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Shift summary, posted by Giuseppe Mercurio, Diego, Martin, Amina on 05 May 2023, 06:33
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achievements:
inserted the magnet and measured delay scan at the maximum magnetic field with opposite directions
data analysis showed that
runs measured during the afternoon/evening led to sample degradation (the sample shows a dark spot, change in the scattering signal is also cearly visible)
corrected |
Re: Shift summary, posted by Giuseppe Mercurio on 05 May 2023, 07:23 
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Actually, it looks like the sync was lost shortly before 23h last night as the jitter went to 0fs and recovered at 1am when a new sync search probably
started.
Giuseppe |
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morning shift summary, posted by Giuseppe Mercurio on 05 May 2023, 14:56
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achievements
with help from LAS OCD, we got the PPL synchronized again with optical lock and close to the initial t0 on the sample
we found
t0 on the sample again
collected data with magnetic field
initial setup of damnit/amore for semi-automatized data processing
problems |
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Late shift summary 05.05.2023, posted by Sergii, Phuong on 05 May 2023, 23:00
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Achivments:
-Measure time scans with magnetic field in opposite directions
Problems |
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night shift summary, posted by Giuseppe Mercurio on 06 May 2023, 06:53
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achievements:
- measured delay scans at sample tilted by 20 degree
problems: |
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night shift summary, posted by Giuseppe Mercurio on 06 May 2023, 06:53
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achievements:
- measured delay scans at sample tilted by 20 degree
problems: |
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morning shift summary, posted by Giuseppe Mercurio on 06 May 2023, 14:42
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achievements
finished recording dataset at 20degree
changed for sample with smaller grains at normal incidence and moved DSSC to 1.2m
OL
induced some change of the sample but the scattering ring remains and then stabilize
started collecting data
problems |
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Late shift summary 06.05.2023, posted by Sergii, Phuong on 06 May 2023, 23:15
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Achivments:
-Measure delay scans at two PPL fluencies on smaller grain size.
-Moved DSSC back to 1.45 m sample - detector distance |
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shift summary, posted by Giuseppe Mercurio on 07 May 2023, 06:52
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achievements:
measured delay scans on 16 nm samples at different magnetic fields (4 runs) before the problem below appeared
problems:
scroll pump of the FFT degraded, rough vacuum got worse, this led to pump in error state and interlock valves. The scroll pump was replaced, |
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morning shift summary, posted by Giuseppe Mercurio on 07 May 2023, 14:47
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achievements
exchanged He dewar and managed to cool down the sample again after vacuum issue last night
started collecting additional scattering
data with alternating magnetic field on large nanoparticles sample
problems |
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Late shift summary 07.05.2023, posted by Sergii, Phuong on 07 May 2023, 23:11
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Achivments:
-Move DSSC closer to the sample.
-Measure delay scans for opposite magnetic field. |