summary of 23.09, posted by Natalia, Justina, Giacomo, Sergey, Ben, Eugenio, Teguh on 24 Sep 2023, 07:49
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Around 6:55 there was a power glitch. Power in the experimental hutch and rack room went down in SASE3, error message in Xray interlock system and no
power for PP laser.
During morning TS turned the power on and interlock issues were solved by DESY. SCS could restart large part of SCS systems, however got help |
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summary late shift day 1, posted by Laurent Mercadier, Martin Teichmann on 18 Apr 2023, 23:01
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Achievements
knife edge scans of FEL beam, 30 um x 30 um beam size
aligned beam stop in front of camera
triggering pattern tested
and works, still need to test with laser and XGM
Problems |
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shift summary day 2 UP3463, posted by Laurent Mercadier, Martin Teichmann on 19 Apr 2023, 23:20
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Achievements
found larger beamstop
found center of pinhole and bender settings for beam size
checked jitter of beam on grating,
looks like jittering is large, to be further investigated offline
checked that patterns are working for the night, to be continued by night |
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shift summary March 30th, posted by Jörg Hallmann on 31 Mar 2023, 01:51
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- seeding at ~800 uJ
- repaired the laser interlock of A.08
- EPIX back in operation |
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shift summary March 29th, posted by Jörg Hallmann on 30 Mar 2023, 02:37
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achievments: alignment of the SDL (both branches)
measuring of samples & calibrants
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shift summary EulerMDL calibration, posted by Antje Trapp on 16 Apr 2023, 23:06 11x
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First four pictures: beam line status at beginning of shift - Beam aligned to MID
Idea is to check M2 parasitic motions again on M3 popin. therefore bringing M2 close to 0 with all vertical motors and Tx as much as possible
without using beam on the popin. |
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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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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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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 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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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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shift summary, posted by Johannes Moeller on 19 Mar 2023, 02:01
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upper and lower branch of SDL aligned
beamsizes and angular mismatch characterized
vacuum leak of flight
path fixed
side view microscope re-aligned
problems with replaced MPC diamond detector. issue with in-vacuum cabeling suspected
misconfigured
timing of AGIPD fixed
splitting ratio of SDL detuned while HXRSS intensity decreased significantly. Possibly correlated.
With |
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shift summary, posted by Ulrike Boesenberg on 24 Apr 2023, 02:45
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Beam came back quickly after cryo-incident with ok seeding performance (not very stable).
Finish 3381-Pudell beamtime with
SRO/STO samples at time delays and laser fluences.
Decided not to scan the HXRSS energy but stay at current position
Mount samples |
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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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shift summary, posted by Giuseppe Mercurio, Teguh Asmara on 02 Aug 2023, 06:44
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achievements:
beam transport with the second half of undulators closed
measured pulse energy in SCS hutch and verified that the transmission
of the beamline with hr grating is as previously reported
knife edge scans along vertical direction to find focus (<=11 um) and horizontal |
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shift summary, posted by Loic Le Guyader on 13 Nov 2023, 07:16
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# Shift Summary
Achievements
- Measured elastic line with 3000 l/mm and 1000 l/mm grating on NiO sample |
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scanning for HED beam, posted by Antje Trapp on 24 Jan 2024, 14:00
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We found reflection of M3 on M2 popin, but could not locate the beam on HED PBLM nor HED_XTD6_SDLBM-1
scanning both horizontally and vertically around previously saved positions on M3 popin.
managed to get beam through to sdlbm-1. No beam found downstream of that. |
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pointing stability, posted by Tommaso Mazza on 02 Jun 2023, 06:17
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we lost spatial overlap on several instances.
It seems that this happens when SASE2 changes number of pulses.
when we have SASE2 changing number of pulses, spatial overlap is lost and this goes with a change in the position read by the xgm in the order |
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other, posted by Chan Kim on 25 Oct 2023, 06:02
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Issue solved (elog:410) after changing NKB mirror coating to B4C.
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other, posted by Chan Kim on 24 Nov 2023, 20:48
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Beam drift in the horizontal direction (XTD9_XGM x position) started at around 10am and continuously drifted until 16:00.
After then, beam has been drifted back to original position within 4 hours. |