Shift summary, posted by Ulf Zastrau on 03 Mar 2023, 23:06
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Beam delivery SASE 8,25 keV, 1300 µJ. Intensity stable,
but beam jittery in horizontal.
PRC (Dommach) did a ZZ around 13:00 and switched off coolling of M1 in XD1, but no effect on beam jitter. |
Shift summary, posted by Tokushi Sato on 02 Mar 2023, 23:13 
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X-ray delivery
9.3 keV, 202 pulses, X-ray intensity had slope over train, 30 % difference between first and last pulse in the train
Sometime
strange intensity slope was observed (screen shot was attached)
Optical laser delivery |
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late shift summary, posted by Giuseppe Mercurio and Sergii on 02 Mar 2023, 22:58
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achievements:
knife edge scans of OL to find lens position corresponding to the smallest beam size
knife edge scans of FEL to determine
the position to proceed for spatial overlap
liquid jet was set up and it's running since afternoon
measured x-ray absortion via |
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Stability Issue, posted by Ulf Zastrau on 02 Mar 2023, 22:54
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HED would like to report that since 2 days the SASE2 beam is instable.
The attached movie shows, on the left (90° rotated, so up-down is left-right)
the beam at the end of the HED hutch, and on the right its the same beam |
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Night shift summary 02.03.2023, posted by Teguh, Luigi on 02 Mar 2023, 05:41
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Achievements:
1. Performed knife-edge scan. The beam size is currently at 5 um x 120 um.
2. Aligned the spectrometer at O K edge (2.8 pixel FWHM, 110 meV resolution, 4800 resolving power) |
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Late shift summary 01.03.2023, posted by Sergii, Martin on 01 Mar 2023, 23:31
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Achievments:
- Align DPS to remove clipping of X-rays
- Get better focusing of PPL in the chamber |
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Shift summary, posted by Tokushi Sato on 01 Mar 2023, 23:25
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X-ray delivery
9.3 keV, 1-352 pulses, 0.8 mJ, stable delivery
Optical laser delivery
800 nm, 101 pulses, 282 kHz, stable delivery
ns laser for illumination
Achievements/Observations |
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Shift summary, posted by Alexander Pelka on 01 Mar 2023, 16:07
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Day shift 28.02
Got the beam, aligned it up to the TCC, mirrors in 3 mrad configuration, checked positions for the CRLs. Optimised
beam at the HAPG. Beam stability was fine, energy up to 1,5 mJ at 8.2 keV, and up to 1 mJ at 9.1 keV (used for the spectrometer calibration). |
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Shift summary, posted by Tokushi Sato on 28 Feb 2023, 23:24
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X-ray delivery
9.3 keV, 1-352 pulses, 0.8 mJ, stable delivery
Optical laser delivery
800 nm, 1-01 pulses, 282 kHz, stable delivery
ns laser for illumination
Achievements/Observations |
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Issue, posted by Romain Letrun on 28 Feb 2023, 07:17
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| In the public status display, it looks like FXE is taking the beam even though their shutter is closed. |
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Shift Summary Feb 26th, posted by Felix Brausse on 27 Feb 2023, 02:10
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Moved out MONO, aligned SDL without MONO
Looked at both beams on DES
Struggled to get the same beam size with SDL inserted compared to direct beam (~8 um); fixed by adjusting slits |
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Shift Summary Feb 25th, posted by Felix Brausse on 26 Feb 2023, 01:37
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Aligned both branches of the split-and-delay line.
Brought the beam into the experimental hutch to image it on the x-ray eye; the
sample hexapod is not moving (again?); the values keep changing, but the device clearly does not move
PLEASE INVESTIGATE TOMORROW
Looked at the beam on the Zyla (Zyla is still in)
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Shift summary, posted by Alexey Zozulya on 24 Feb 2023, 22:57
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- Measured the speckle patterns using EPIX detector to estimate the beamsize focused down by 1D lens (Row 13).
- Heat load test to NFL #18 with 50 bunches.
- Measured the speckle patterns with 2D focusing lens to estimate the beamsize. wire edge scan? |
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Shift summary, posted by Adam Round on 24 Feb 2023, 05:39
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Staff: AR, KK
X-ray delivery
9.3keV
Optical laser delivery |
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shift summary, posted by Jan-Etienne Pudell on 24 Feb 2023, 00:55
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We tested pulse on demand scans with scantool and confirmed that there is only one shot per scan point. This was used to print the footprint in
a LIf crystal.
We took caustic scans for 1D diamond lenses using a wire and using specles to extract the beamsize. |
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shift summary, posted by Jan-Etienne Pudell on 23 Feb 2023, 01:51
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After realignement of M1 and M2 we could solve the problem of the elogated beamprofile. Different lens setting were prealignd for the use in combination
with the NFL.
We took data for several 1D diamond lenses together with a Vycor sample to extract the beamsize from the specles. |
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Stability Issue, posted by Peter Zalden on 22 Feb 2023, 14:53
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Instability observed today at 14:05, reported to PRC and BKR, including RC: We saw RMS jitter amplitude of up to 4 mm at FXE imager. The jitter was also
seen by the upstream XGM with 100 um RMS amplitude. So it is something from the source.
This instability is suddenly appearind/disappearing and was absent over night and started this morning at 7h to occasionally turn on. It appear |
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SASE1 changing photon energy changes the 2-color setup in SASE3, posted by Thomas Baumann on 21 Feb 2023, 23:31
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We were set-up for 5.7 keV photon energy in SASE1. We made a test with BKR to change this energy to 9.3 keV. This had an effect on our two-color setup:
The first color pulse energy increased. See att 1. Green is the reference at 5.7 keV, blue is at 9.3 keV.
Att 2 shows the XGM history: pulse energy went up to 200 uJ in SQS XGMD during the change. |
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shift summary, posted by Jan-Etienne Pudell on 21 Feb 2023, 23:07
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- Tunnel + experimental hutch alignment (Mirrors, CRL1 and CRL2)
- Aligned main devices: Optics Peter, x-ray eye, EPIX and Zyla and pin holes.
- Tried some alignment of the NFL (1D) lenses with pin hole and not pre focussed beam. We found a lot of scattering from pinholes which dominates |
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Night Shift Summary, posted by Ben, Manuel on 20 Feb 2023, 06:46
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Achievements
Measured self-refreenced XAS spectra with single color baem at the Mg K-edge
Problems
Liquid jet required some mantanence during the shift
Some newton detector images filled with NANs
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