shift summary, posted by Johannes Moeller on 18 Mar 2023, 01:45
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stable HXRSS delivery at 8.99 keV, 1 bunch. XGM intensity during the day decreased from 750 uJ to 600 uJ.
Vacuum in sample chamber
stabilized with cold trap and full beam path opened to AGIPD and endstation
Again problems with smaract stages in DES, but imager in a good
position to continue.
First scattering data recored from water jet. Unknown, bimodal intensity distribution
Focus characterization |
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Late shift summary 17.03.2023, posted by Robert, Zhong, Manuel on 17 Mar 2023, 23:43
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Activities:
continued tr-RIXS scans
tried to find ways to mitigate the energy drifts of the mono (see below)
confirmed in user
data that the FEL-PPL timing was not changing (see below)
setting up for tr-RIXS at beginning of night shift
Problems: |
Shift summary, posted by Johannes Moeller on 17 Mar 2023, 01:48 
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The intensity of the Seeding decreesed from 850 uJ to 550 uJ during the time between 20:00 and 02:00.
The Spectral purity also got worst, the beam in HIREX looks to have more SASE shoulders.
Between 18 and 20 we show a prossible transiant signal, PPL, of the lower branch. But a problem with the monochromator in the MID opt Hutch trigger |
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End of shift, posted by Johannes Moeller on 16 Mar 2023, 01:35
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Stable HXRSS delivery with >800 uJ, 1 bunch, 8.99 keV.
Re- Alignment of X-ray beam performed.
-Beam position defined for sample interaction in SAM CAM1. Do not touch SAM CAM1 |
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Shift summary, late 2023.03.15, posted by Robert, Manuel on 16 Mar 2023, 00:26
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Activities:
Found coarse and fine timing between FEL and PPL at 266nm
Set up for tr-RIXS during the night
Problems:
2 fastADC channels appear to be dead.
Optical locking of the PPL syncronisation system took a very long time (> 30 minutes)
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morning shift summary, posted by Benjamin, Nahid, Raphael, Philippe, Victoria, Timo on 15 Mar 2023, 17:01
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Achievements
Found RIXS signal from liquid jet
Measured static RIXS and PFY-XAS spectrum of Co(cp)(CO)2
Problems
hRIXS detector has a data latency issue and images were not being recorded in the DAQ. This required ~2-3 hours to solve plus time lost |
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shift summary, posted by Johannes Moeller on 15 Mar 2023, 01:50
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HXRSS delivery, 600 - 700 uJ, 1 bunch, 8.991 keV. Pedestal visibly in HIREX, not checked with MID spectrometer yet.
beamline aligned
and beam brought to popin imager
struggle with jet pumping, to be continued
beam brought into experimental hutch, first rough alignment
of reference samples and cameras
Epix flight path leaked and window re-glued
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Issue, posted by Harald Sinn on 14 Mar 2023, 20:26
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SCS could only use two pulses, because the SXP imager was still in the beam and SXP shutter open.
I removed the SXP imager, so SCS can now get the full beam. The SXP shutter is still open and SXP instrument contacted via email to find out,
if the shutter is intentionally open. |
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Issue, posted by Harald Sinn on 14 Mar 2023, 14:40
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In order to optimise the performance of SASE2 self seeding, a stronger compression setting is required.
The RC proposed to increase the time window between SASE2 and SASE1/3 to avoid performance degradation and cross talk effects on SASE1/3.
I discussed with SCS and FXE instruments and there seems to be nothing against moving the time trigger by 30 micro seconds later, as proposed |
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Issue, posted by Harald Sinn on 14 Mar 2023, 10:56
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The longitudinal feedback on SA1/3 was swicthed off by mistake over night. When it will be switched on, the beam may wiggle a bit an SA1+SA3 for
short.
We agreed with SCS and FXE that this will be done today at 11:30 |
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SA2 status, posted by Frederik Wolff-Fabris on 11 Mar 2023, 12:46
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The SA2 XTD1 XGM is current offline since Saturday morning.
Yesterday, Friday, it already started to present communication problems ( https://ttfinfo.desy.de/elog/FileEdit?file=/XFELelog/data/2023/10/10.03_a/2023-03-10T19:06:29-00.xml&xsl=/elogbook/xsl/elog-fileform.xsl&mode=edit
) and today it became clear a Hard drive is broken and need to be exchanged. |
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Shift summary, posted by Ulf Zastrau on 06 Mar 2023, 06:48
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X-ray delivery stable in intensity, 1300-1400 mJ at 8150 eV SASE.
user experiment 3430 (Zastrau / Mishchenko)
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Night shift summary 05.01.2023, posted by Teguh, Luigi on 06 Mar 2023, 06:20
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Achievements:
1. Continued measuring time-resolved and static RIXS on water (run table in elog entry #103)
2. Periodically checked spatial overlap and BAM compensator in-between measurements. |
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Shift summary, posted by Juncheng E on 05 Mar 2023, 23:13
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X-ray delivery
9.3 keV, 202 pulses, 564 kHz, intensity slope was fine
Optical laser delivery
800 nm, 68 pulses, 188 kHz. stable delivery
ns laser for illumination
Achievements/Observations |
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Late shift summary 05.03.2023, posted by Sergii, Andreas on 05 Mar 2023, 23:04
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Achievments
-RIXS scans at different delay times and x-ray energies
-Cross check fine timing |
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late shift summary, posted by Sergii, Andreas on 04 Mar 2023, 23:04
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Achievements:
- we replaced broken SMA cable, and added an angle-connector at sample holder to aid the sample rotation when moving diagnostics to the flat
jet |
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Shift summary, posted by Tokushi Sato on 04 Mar 2023, 22:55
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X-ray delivery
9.3 keV, 202 pulses, 564 kHz, intensity slope was fine
Optical laser delivery
800 nm, 68 pulses, 188 kHz. stable delivery
ns laser for illumination
Achievements/Observations |
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Night Shift Summary on 04.03.2023, posted by Teguh, Luigi on 04 Mar 2023, 07:00
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Achievements:
- Improved the vacuum of the chamber slightly
- Found the spatial overlap between FEL and jet |
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Shift summary, posted by Tokushi Sato on 03 Mar 2023, 23:27
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X-ray delivery
9.3 keV, 202 pulses, 564 kHz, intensity slope was flat
Optical laser delivery
800 nm, 68 pulses, 188 kHz. stable delivery
ns laser for illumination
Achievements/Observations |
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Late shift summary, posted by Giuseppe, Sergii on 03 Mar 2023, 23:25
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achievements:
change the optical laser to 2 um
found focus of 2 um beam
found saptial overlap
course timing was checked
looking
for fine timing using SiN
problems: |