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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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 |
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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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 Chan Kim on 31 Jan 2024, 23:26
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31.01.2024 (Day shift)
X-ray delivery
10 keV
1200 - 400 uJ (significant pulse energy slope within train)
Optical laser delivery |
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Issue, posted by Romain Letrun on 01 Feb 2024, 21:56
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At 21:29:20 today, the number of bunches in SASE1 was increased from 1 to 352 without intervention of the SPB/SFX shift crew. 30 seconds later, the number
of bunches was reduced to 1, again without intervention from the SPB/SFX shift crew (see attachments 1 and 2).
We were in the middle of a measurement at that time and the sudden increase from 10 mW to 3.5 W average power resulted in the destruction of |
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Shift summary, posted by Romain Letrun on 02 Feb 2024, 00:04
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X-ray delivery
1-352 pulses at 10 keV, 1200 - 400 uJ.
Significant pulse energy slope within the train. Action on the kickers was eventually
performed leading to some reduction of the slope, though remaining still far from ideal. Decision to take the action took a very long time (2.5 hours).
Several |
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Shift summary, posted by Romain Letrun on 02 Feb 2024, 23:31
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X-ray delivery
1-64 pulses at 10 keV, ~1.1 mJ.
Overall stable delivery.
Optical laser delivery
NA
Achievements/Observations |
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Shift summary, posted by Tokushi Sato on 08 Feb 2024, 23:14
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X-ray delivery
1-350 at 12.45 keV, 1700 uJ. Stable delivery
Optical laser delivery
None
Achievements/Observations |
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Shift summary, posted by Tokushi Sato on 10 Feb 2024, 00:12
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X-ray delivery
1-350 at 12.45 keV, 1700 uJ. Stable delivery
Optical laser delivery
None
Achievements/Observations |
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Shift summary, posted by Tokushi Sato on 10 Feb 2024, 23:32
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X-ray delivery
1-350 at 12.45 keV, 1750 uJ. Stable delivery
Optical laser delivery
None
Achievements/Observations |
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Shift summary, posted by Tokushi Sato on 11 Feb 2024, 23:04
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X-ray delivery
1-350 at 12.45 keV, 1700 uJ. Stable delivery
Optical laser delivery |
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Shift summary, posted by Tokushi Sato on 13 Feb 2024, 01:02
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X-ray delivery
1-350 at 12.45 keV, 1600 uJ. Stable delivery
Optical laser delivery
None
Achievements/Observations |
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Issue, posted by Romain Letrun on 13 Feb 2024, 08:52
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| Like after the previous winter maintenance period, the shutter of FXE appears as opened in DOOCS panels even though it is closed (https://in.xfel.eu/elog/OPERATION-2023/58). |
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Shift summary, posted by Romain Letrun on 15 Feb 2024, 09:32
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X-ray delivery
1 to ~332 pulses at 6 keV, 4.5 mJ
Stable delivery
Number of pulses limited by the Photon Beam Power local limit
that is set to 16 W. Is this intentional? All other limits are set to 40 W
Achievements/Observations |
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Shift summary, posted by Tokushi Sato on 21 Feb 2024, 23:00
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X-ray delivery: stable and flat over 250 pulses per train. 1.1 MHz with 400 uJ
Optical laser delivery: NA
Achievements/Observations: |
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Shift summary, posted by Tokushi Sato on 22 Feb 2024, 22:52
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X-ray delivery: stable and flat over 190 pulses per train. 1.1 MHz with 200 uJ short intervention needed to improve intensity after it dropped
Optical laser delivery: NA
Achievements/Observations: |
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Shift summary, posted by Tokushi Sato on 23 Feb 2024, 23:03
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X-ray delivery:
stable and flat over 190 pulses per train. 1.1 MHz with ~200 uJ
Optical laser delivery: |
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Shift summary, posted by Johan Bielecki on 25 Feb 2024, 00:11
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X-ray delivery
9.10 keV; 190 pulses per train @1.1 MHz with roughly 140-200 uJ; observed some fluctuation in the photon flux
Optical laser delivery |
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Shift summary, posted by Tokushi Sato on 25 Feb 2024, 22:54
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X-ray delivery
9.10 keV; 190 pulses per train @1.1 MHz with roughly 170-200 uJ; stable delivery
Optical laser delivery
ns laser for particles visualization
Achievements/Observations |