SASE3 end of shift summary, posted by Antje Trapp on 22 Jul 2024, 15:27
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this morning, ZZ was done together with Sylvia Huynh (EEE) to solve softmono pre-mirror motor issue https://redmine.xfel.eu/issues/177392
The issue was solved and also mechanical functionality of the stage was checked.
After ZZ, the beamline remained interlocked. Hutches will be searched and closed tonight to allow final checks on Tuesday |
SASE2 end of shift summary, posted by Antje Trapp on 22 Jul 2024, 15:20 
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Beam is now aligned back to HED for hand-over to Naresh (see picture)
points achieved:
-vibometer measurements on M2 at high energy, 2,1 and 3 mrad setting |
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Compensation of M2 RY motor for the case of Piezo off, posted by Kelin Tasca on 18 Jun 2024, 13:03
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We plan to put the piezos of M2 off, in the (unprobable) case that this is the reason of the "jumps" in SASE3 trajectory.
Therefore, I measured the change on RY and RZ motors, to correct all the positions
Fig 1: initial position, Motors Ry=10.5425 and RZ=-14.7200 Piezo Ry =5 and Rz=5 |
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Shift summary, posted by Jörg Hallmann on 14 Jun 2024, 01:53
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continue with Tempus tests
continue with PAM commissioning (first results of the working device at MID)
comments: |
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Shift summary, posted by Jörg Hallmann on 13 Jun 2024, 01:46
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alignment of the instrument including collimation and beam shaping
test of the tempus detector using standard samples with different rep rates, intensities & # of pulses
start commissioning of the PhotonArrivalMonitor (temporal & spatial overlap, white light spectrum) |
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Shift summary, posted by Abhisakh Sarma on 11 Jun 2024, 00:43
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**X-ray delivery**
7.0 keV, up to 202 pulses at 564 kHz, 1.0 mJ.
**Optical laser delivery**
ns laser for jet illumination
**Achievements/Observations** |
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Shift summary, posted by Chan Kim on 09 Jun 2024, 22:45
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X-ray delivery
7.0 keV, up to 202 pulses at 564 kHz, 1.0 mJ.
Optical laser delivery
ns laser for jet illumination
Achievements/Observations |
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Shift summary, posted by Giuseppe Mercurio on 09 Jun 2024, 22:21
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Late Shift summary
Achievements:
- recovered the beam overlap |
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Shift summary, posted by Abhisakh Sarma on 08 Jun 2024, 23:20
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X-ray delivery
- 7.0 keV, up to 202 pulses at 564 kHz, 1.0 mJ.
- X-ray beam pointing changed at around 18:12 and it affects nano KB focus (from ~200nm to ~1um). |
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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 |
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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 |