Afternoon shift summary on 16.08.2023, posted by Teguh Citra Asmara on 17 Aug 2023, 11:08
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Achievements:
tr-RIXS at 4 mJ/cm2 for energies A, B, C, and D (pre-edge)
Checked and optimized FEL alignment, t0 and overlap with PP laser
after reset of machine synchronization
Long delay scans for Peak A and C, up to 100 ps |
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Morning Shift Summary on 16.08.2023, posted by Teguh Citra Asmara, Eugenio Paris on 17 Aug 2023, 11:07
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Achievements:
Performed tr-RIXS on peak A, B, and C at 2.4 mJ/cm^2
Performed tr-XAS on peak A at 3 fluences
Performed tr-RIXS
on peak A at 4 mJ/cm^2
Problems: |
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Night Shift Summary on 15.08.2023, posted by Sergii Parchenko, Manuel Harder on 17 Aug 2023, 11:06
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Achievements:
Replaced focusing lens of PP laser and measured focus with knife edge, focus is about 720 micron vert. & 600 horizontal. Horizontal
x-ray spot size is 220 micron
Adapted fluence calibration for the new spot sizes
Optimized spatial and temporal overlap with new |
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Late Shift Summary on 15.08.2023, posted by Justine Schlappa, Le Phuong on 17 Aug 2023, 11:04
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Achievements:
Set up PP laser, find spatial and temporal overlap between FEL and PP laser
Optimize MCP and HAMP settings for good XAS signal
Find
time zero from XAS on sample and optimize for XAS delay scans at 40 deg incidence angle
Take a fluence series on XAS delay scan from about 0.1 |
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Morning Shift Summary on 15.08.2023, posted by Teguh Citra Asmara, Eugenio Paris on 17 Aug 2023, 11:00
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Achievements
Start cooling down the sample
Align the beamline and deliver the beam into the sample
Performed knife edge scans
and enlarge the beam horizontal size to 350 um
Tuned the VHM bending by checking the hRIXS resolution
Performed energy calibration |
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Shift end, posted by Jayanath Koliyadu on 13 Aug 2023, 21:33
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X-ray delivery
9.3 keV, up to 181 pulses at 564 kHz, 8 - 1.3 mJ
Issue with pulse energy stability along the pulse train in the morning but
optimzed later on in the day
Optical laser delivery |
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Shift end, posted by Jayanath Koliyadu on 12 Aug 2023, 22:50
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X-ray delivery
9.3 keV, up to 181 pulses at 564 kHz, 1.8 - 1.9 mJ
Optical laser delivery
PP Laser, 800nm, 50 fs, up to 181 pulses @ 564 kHz and 91 pulses at 282 kHz, stable delivery
Achievements/Observations |
Issue, posted by Romain Letrun on 12 Aug 2023, 07:19 
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| Potentially damaged 1.2 mm CVD in XTD2 attenuator. This feature was not present earlier in the week. |
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Shift summary, posted by Romain Letrun on 12 Aug 2023, 07:12
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Shift summary for 11.8.2023
X-ray delivery |
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Shift summary, posted by Jörg Hallmann on 12 Aug 2023, 01:32
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measured various sample using the levitation device
issues:
during the change of the sample detector distance, the AGIPD chiller "Julabo" switch itself off and went into error - on & off procedure |
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Shift summary, posted by Romain Letrun on 11 Aug 2023, 07:16
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Shift summary for 10.8.2023
X-ray delivery
9.3 keV, up to 181 pulses at 564 kHz, 1.8 - 1.9 mJ
Optical laser delivery |
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Shift summary, posted by Jörg Hallmann on 11 Aug 2023, 01:44
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alignment checks of the CRL2 device as well as the Mono - continuation of both devices together planned for tomorrow
flatfelds for EPIX & AGIPD (needed to be redone because of too low intensity during the previous measurements)
installation of the levitation device and first test measurements |
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Issue, posted by Raúl Villanueva-Guerrero on 10 Aug 2023, 22:43
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Here is a capture of the observed issue with the SPB shutter the past night.
Observe the two opening/closing incidents: the first kept the shutter "OPEN" signal during 4 minutes aprox., and the second did |
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Shift summary, posted by Romain Letrun on 10 Aug 2023, 07:22
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X-ray delivery
9.3 keV, up to 181 pulses at 564 kHz, ~1.8 mJ. Overall stable delivery.
Optical laser delivery
800 nm, 50 fs, 564 kHz, up to 185 pulses. Overall stable delivery.
Achievements/Observations |
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Shift summary, posted by Jörg Hallmann on 10 Aug 2023, 01:31
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- finalized the flatfields of the AGIPD at 0.5 MHz
- optimized the performance of the beam (now 850 - 950 uJ)
- measured flatfield and darks for the Jungfrau detector |
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Shift summary, posted by Jörg Hallmann on 09 Aug 2023, 01:42
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after alignment of the beam, the main topic of the day were flatfields for the AGIPD with various
settings
corresponding darks have been taken in addition
it was challenging to generate proper flatfield intensities
on the detector (1photon peak equally high as the 0photon peak) due to the low intensity (750uJ)
shift crew received a warning of the machine |
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Shift end, posted by Jayanath Koliyadu on 08 Aug 2023, 22:57
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X-ray delivery
9.3 keV, ~ 2 mJ, stable delivery except for the intensity slope along the train (fixed later on)
Optical laser
delivery |
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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 |
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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 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 |