Shift summary, posted by Jörg Hallmann on 08 Aug 2024, 00:18
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optimization of seeding (still not as good as needed)
set position for the two color mode (difference 3-4 ev)
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Shift summary, posted by Jörg Hallmann on 09 Aug 2024, 01:59
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optimized the SDL alignment
found timing of the upper (-520 ps) and lower branch (-514.5 ps) of the SDL
moved the upper branch by 3 ps (positive) and lost the beam on the merger crystal - difficult to get it back |
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Shift summary, posted by Jörg Hallmann on 10 Aug 2024, 01:17
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Found the delay time from upper and lower branches of SDL with a frosted-YAG.
The upper branch is -512.8 and the lower branch is -513.28.
The delay time difference is about 500 fs. |
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Shift summary, posted by Jörg Hallmann on 26 Sep 2024, 01:46
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Started the day with vacuum & detector issues
real start of the experiments only at about 6 p.m.
measurement of a selection of samples (urea, ludox) using the levitation device |
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Shift summary, posted by Jörg Hallmann on 27 Sep 2024, 01:51
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started initial alignment for the ptycho experiment
Continued with XPCS measurement using the levitation device
issues: contribution of the 2nd harmonic of 8 keV at 16 keV visible on the Jungfrau detector - surpressing via mirror alignment not successful |
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Shift summary, posted by Jörg Hallmann on 28 Sep 2024, 01:31
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started with data acquisition for the ptycho experiment with different geometries
started with XPCS measurements of capillaries using the FSSS |
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Shift summary, posted by Jörg Hallmann on 28 Sep 2024, 23:42
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continued with the evaluation of the XPCS analysis packages
investigated the effect of alignment optimizations and forced misalignments on the contrast directly with the online XPCS tool
checked additional standard samples |
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Shift summary, posted by Jörg Hallmann on 30 Sep 2024, 01:50
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01:49
Worked on the XPCS analysis packages |
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Shift summary, posted by Jörg Hallmann on 05 Dec 2024, 00:06
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machine runs at 17 keV with about 1.2 mJ
achievements: |
Shift summary, posted by Jörg Hallmann on 06 Dec 2024, 02:41 
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optimization of the timing of the involved components (laser, cameras, FEL)
generation of the first bubbles in water
issue |
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Shift summary, posted by Jörg Hallmann on 07 Dec 2024, 02:04
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data collection of bubbles in elastomers (good progress)
issue: beam loss in the tunnel during the day - experts checked the situation and the situation improved during the evening |
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Shift summary, posted by Jörg Hallmann on 08 Dec 2024, 02:49
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successful measurements of elastomer, gelatine & bio samples
issue:
beam loss at about 2:45 due to communication issues with accelerator modules |
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Shift summary, posted by Juncheng E on 20 Apr 2024, 23:37
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Staff: JK, SB, JE, AS, RW, FK
**X-ray delivery:**
- 21 keV, ~500 uJ |
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Shift summary, posted by Juncheng E on 01 May 2024, 23:31
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X-ray delivery
9.3 keV, 3.3 mJ, 190 pulses/train
Optical later delivery
For jet illumination
Achievements/Observations |
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Shift summary, posted by Juncheng E on 02 May 2024, 23:19
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X-ray delivery
9.3 keV, 3.3 mJ, 190 pulses/train
Optical later delivery
For jet illumination
Achievements/Observations |
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Shift summary, posted by Juncheng E on 03 May 2024, 23:31
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X-ray delivery
- 9.3 keV, 3.1 mJ, 214 pulses/train at 1.1 MHz and 132 at 0.5 MHz
Optical later delivery |
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Issue, posted by Johannes Moeller on 05 Dec 2024, 09:18
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MID operation limited to 55 bunches by SA2_XTD1_OPTICS_PROTECTION/MDL/ATT1 because of inserted Si 0.5mm. Seems a bit too tight for 1mJ@17keV, since diamond
is not so usefull at this photon energy anymore. |
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Stability Issue, posted by Johannes Moeller on 06 Dec 2024, 06:37
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| The jumps keep repeating very frequently since yesterday afternoon. The overall drift of the beam seems to accalerate as well. |
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Stability Issue, posted by Johannes Moeller on 06 Dec 2024, 07:49
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| And since the 4th there are some instabilities in the vacuum levels at M1 and M2 as well. |
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Shift summary, posted by Johan Bielecki on 25 Feb 2024, 00:11
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X-ray delivery
9.10 keV; 190 pulses per train @1.1 MHz with roughly 140-200 uJ; observed some fluctuation in the photon flux
Optical laser delivery |