HED 6keV after Euler MDL, posted by Antje Trapp on 19 May 2024, 15:20 
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M1 - M2 - M3 euler fine tuning geometriy parameters, posted by Antje Trapp on 19 May 2024, 14:49
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We fine tuned geometry parameters for linear effects on X motion (parallel offset) for all three mirrors.
dTz was corrected for M2 and M3 to -6.5mm (same geometry)
dTz was corrected for M1 to +6mm |
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Status, posted by Dirk Raiser on 17 May 2024, 10:42
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Laser status:
After the laser issues listed in https://in.xfel.eu/elog/OPERATION-2024/99 the
late shift was finally able to find a timing setting for the amplifier trigger that was beyond stable settings under usual conditions, but which allowed |
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Shift summary, posted by Romain Letrun on 14 May 2024, 11:49
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X-ray delivery
11.56 keV, 1-197 pulses @ 564 kHz, 2.6 mJ.
Optical laser delivery
No PP laser output after shift change.
Achievements/Observations |
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Issue, posted by Andreas Koch on 14 May 2024, 09:56
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EPS issue for Transmissive imager SA1 (OTRC.2615.T9) w.r.t Operation eLog #96
The motor screen positions w.r.t. the EPS switches had been realigned (last Wednesday 8th May), tested today (14th May) and the EPS is again
enabled for the different beam modes. All is back to normal. |
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Shift summary, posted by Romain Letrun on 13 May 2024, 10:36
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X-ray delivery
11.56 keV, 1-197 pulses @ 564 kHz, 2.4-3.1 mJ.
Beam down a bit over
1 hour due to accelerator interlock problem.
Optical laser delivery |
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Shift summary, posted by Ulrike Boesenberg on 13 May 2024, 08:48
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Weekend summary:
Overall stable beam delivery with 300bunches @18keV and 750uJ
-issue with XGM on Saturday night/morning |
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Shift summary, posted by Romain Letrun on 12 May 2024, 07:35
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X-ray delivery
11.56 keV, 1-352 pulses @ 1.13 MHz, 2.4-3.1 mJ. Stable delivery.
Intensity gradient with long train now slightly less than
20%.
Optical laser delivery |
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Shift summary, posted by Romain Letrun on 11 May 2024, 07:20
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X-ray delivery
11.56 keV, 1-352 pulses @ 1.13 MHz, 2.4-3.1 mJ. Stable delivery.
Intensity gradient with long train better than previous shifts
(~20% drop).
Optical laser delivery |
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Shift summary, posted by Romain Letrun on 10 May 2024, 07:06
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X-ray delivery
11.56 keV, 1-352 pulses @ 1.13 MHz, 2.6-3.1 mJ. Stable delivery.
Intensity gradient with long train could not be reduced by
BKR.
Optical laser delivery |
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Issue, posted by Rebecca Boll on 10 May 2024, 00:04
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our pp laser experienced timing jumps by 18 ns today. this happened for the first time at ~7:30 in the morning without us noticing and a couple of more
times during the morning. we realized it at 15:30 due to the fact that the signal on our pulse arrival monitor (X-ray/laser cross correlator downstream
of the experiment) disappeared. we spent some time to investigate it, until we also see this jump in two different photodiodes different triggers (oscilloscope |
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other, posted by Tommaso Mazza on 09 May 2024, 10:45
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we needed SASE1 to be set to 0 pulses briefly to check alignment in our experiment.
The FXE control hutch was empty. we could not reach either Chris nor Mykola by phone. The XFEL_StatusPublic shows that the FXE shutter is closed
(we can also see the exp hutch door open from outside the control hutch). |
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Shift summary, posted by Romain Letrun on 09 May 2024, 07:14
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X-ray delivery
11.56 keV, 1-352 pulses @ 1.13 MHz, 2.6-3.1 mJ.
Average intensity slowly decaying through the night.
Quite some
intensity gradient through the train (~35%).
Optical laser delivery |
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Issue, posted by Raúl Villanueva-Guerrero on 08 May 2024, 13:51
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Dear all,
Due to a probable issue at the SA1 Transmissive imager, the "OUT" and "YAG" position indication signals seems to be not responsive.
After the FXE team noticed that MODE S was interlocked, the root cause has been narrowed down to this component. Later, further investigation |
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Experiment summary, posted by Konopkova Zuzana on 05 May 2024, 00:25
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proposal 5700 finished on 04.05. The experiment used 352 pulses at 4.5 MHz and 18 keV to X-ray heat pressurized samples in diamond
anvil cells. Overall succesful on several samples.
Issues:
the requested 20.5 keV photon energy had too low pulse intensities
so we had to go down to 18 keV
pulse energies at 18 keV (300-400 uJ) were insufficient for some samples
the ramp in pulse envelope |
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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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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 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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Issue, posted by Andreas Galler on 01 May 2024, 16:39
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840 pulses not possible at SXP due to big brother settings for the EPS Power Limit rule. The minimum pulse energy was assumed to be 6 mJ while the actual
pulse XGM reading is 550 uJ.
Solution: The minimum assuemd pulse energy had been lowered from 6 mJ to 2 mJ. This shall be reverted on Tuesday next week. |
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Shift summary, posted by Jörg Hallmann on 27 Apr 2024, 02:11
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optimized the FEL energy on the absorption edge of Iridium
measurements on the SDW
of Chromium with max magnetic discharges of the PUMA at different attenuations
changed the sample from Chromium to user samples
issues:
energy scan not efficiently working
poor seeding quality in long FEL trains |