Strange pulse behavior upstream XGM, posted by Faisal Hammad Mekky Koua on 17 Jun 2023, 07:41 
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- Pulse intensity decreases drastically at XTD2 across the train
- the visualisation of our beam therfore needs to be compensated adjusting transmission
- beam shape and uniformity is different than previous days and it is unclear how much of this is related to real changes in the beam or an effect |
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Summary: Night 13th and Day 14th, posted by Thomas Baumann on 14 Sep 2023, 16:49
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The late shift on the 13th fixed remaining problems with the DLD and the calibration pipeline.
The night shift was then able to collect data on O2 using the two-color mode. Systematic studies were done at different photon energies for both
colors. This was done for full FEL intensity and 10%. |
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Shift summary 11.10.2023, posted by Tokushi Sato on 12 Oct 2023, 02:00
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Staff: JK, CK, KL, AS
X-ray delivery
8.4 keV, up to 260 pulses at 1.1MHz, 3.5 mJ
Optical laser delivery |
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SASE 3 background heavily impacts our focus, posted by Diogo Filipe Monrroy Vilan e Melo on 25 Oct 2023, 02:43
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Attch 1: We were having trouble focusing at IRU chamber. After multiple attempts the best we could achieve was 2.9-3.1 um beam.
Attch 2: We then wanted to test if this was caused by the SASE 3 background, after them changing from >350 pulses to 1, we saw an instant
improvement of ~0.5um down to 2.3 um beamsize. |
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Shift Summary, posted by Diogo Filipe Monrroy Vilan e Melo on 25 Oct 2023, 06:02
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Staff: DM, CK, KK
X-ray delivery
7.8keV, 2.4mj, stable delivery, homogeneos intra train energy most of the time.
SASE 3 background
Optical |
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Shift summary 25.10.2023, posted by Diogo Filipe Monrroy Vilan e Melo on 26 Oct 2023, 06:48
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Staff: DM, CK, KK, JB, SR (SEC), LW (Uppsala university), MM (GU)
X-ray delivery
7.8keV, 2.4mj, stable delivery, homogeneos intra train energy most of the time.
Optical laser delivery |
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KW44 - Leak in Solid Attenuator, posted by Janni Eidam on 07 Nov 2023, 15:57
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There was a leak in the Solid Attenuator that increased on Saturday morning when SPB moved the arm number 4 (see last entry ID 236).
We were lucky that a balance developed between the leak and the pumping of the ion pumps, so by setting the setpoints of the three most affected
ionpumps to 5x10-5 mbar we could survive the weekend and save the beamtime. |
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Sample Camera got stuck (likely at 11pm) and was only noticed at 5am, posted by Bjoern Senfftleben on 24 Nov 2023, 05:07
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After going in and reconnecting the camera, we observe att. 1.
According to logs the camera device server was restarted around 11pm, however the camera instance was never reinstantiated after the restart. |
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Solid attenuator arm 5 limit switch, posted by Antje Trapp on 30 Jul 2024, 10:38 6x
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On 27th of July, it was reported that arm 5 of the solid attenuator did not stay in 'out' position when retracted, but moved
in immediately again.
Reason was, that the limit switch for the 'out'-position did not trigger, and thus the actuator was in error state. Default for error |