Shift summary, posted by Natalia Gerasimova on 08 Jun 2024, 15:21
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Morning shift on 08.06.2024 (Natalia, Teguh, Yi Ping)
Achievements:
Focus the KB to ca. 40 um
Found time zero using delay scan of the RIXS PFY
Found strong pump probe effect on the
Fe reference sample
Problems: |
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Shift summary, posted by Chan Kim on 07 Jun 2024, 23:12
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X-ray delivery
- 7.0 keV, up to 202 pulses at 564 kHz, 1.0 mJ.
- Average pulse energy was about 1.9 mJ on Tuesday and Wednesday. It has to be discussed with BKR tomorrow morning. |
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Shift summary, posted by Giuseppe Mercurio on 07 Jun 2024, 15:19
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Morning Shift Summary for 07.06.2024 (Teguh, Natalia)
Achievements:
Aligned the beamline to deliver the FEL beam into the hutch
Check the FEL beam size using knife-edge scans
Requested
BKR to re-tune the FEL to achieve higher pulse energy. They are still tuning, but we aim to reach 3 mJ per pulse
Problems: |
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Shift summary, posted by Romain Letrun on 05 Jun 2024, 23:22
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X-ray delivery
7.0 keV, up to 202 pulses at 564 kHz, 1.6-1.9 mJ.
Average pulse energy tuned up to 1.9 mJ at 14:45, but slow continuous decay
after that down to 1.7 mJ at the end of the shift.
45 minutes downtime in the morning and another 15 minutes to reset the IBFB later on, as |
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Shift summary, posted by Romain Letrun on 04 Jun 2024, 23:38
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X-ray delivery
7.0 keV, up to 202 pulses at 564 kHz, ~1.7 mJ.
Number of pulses initially limited to 178. Promptly addressed by BKR.
Optical laser delivery |
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Shift summary, posted by Romain Letrun on 27 May 2024, 23:33
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X-ray delivery
6.0 keV, up to 202 pulses at 564 kHz 1.3-1.8 mJ.
Decaying intensity through the day. Recovered once at 15:15 and slowly decaying
again after that.
Optical laser delivery |
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Shift summary, posted by Konopkova Zuzana on 27 May 2024, 06:41
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beam parameters: 2 colors at around 6.5 keV, 1 pulse
achievements:
user program continues with data acquisition at slightly varying photon energies (tens of eV both colors simultaneously) and at different delays |
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Shift summary, posted by Romain Letrun on 26 May 2024, 23:23
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X-ray delivery
6.0 keV, up to 202 pulses at 564 kHz, 1.8-1.9 mJ.
Stable delivery except for downtime at start of shift (until 7:15) and two
more hours in the morning.
Optical laser delivery |
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Stability Issue, posted by Thomas Baumann on 26 May 2024, 21:56
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We asked the machine for two color mode in the morning. Tuning gave good results at first (1.6mJ second color, 100uJ first color), but as soon as any
of the colors was switched off and on again the pulse energy dropped (~600uJ) and BKR had to retune to even get a fraction of the pulse energy back back.
The same happened when changing the delay |
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Shift summary, posted by Romain Letrun on 26 May 2024, 00:23
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X-ray delivery
6.0 keV, up to 202 pulses at 564 kHz and 101 at 282 kHz, 0.8-1.6 mJ
Low pulse energy after beam handover. Improved around
10:00.
~1.5 hour downtime due to issue with A5.
Several timing jumps of up to 1.5 ps visible on BAM and confirmed by X-ray/optical |
Issue, posted by Rebecca Boll on 25 May 2024, 02:38 
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Today in the afternoon, SASE1 was tuned (a description of the activities in att 4). We now realize that this has in some form changed the SQS pulse parameters.
att 1 shows ion spectra recorded under nominally the same photon parameters before (run 177) and after (run 247)
it's also visible in the history of the SASE viewer that the behavior of the SASE3 pulse energy is different before and after 15:45, which |
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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 |