Shift summary, posted by Jörg Hallmann on 09 Aug 2024, 01:59
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optimized the SDL alignment
found timing of the upper (-520 ps) and lower branch (-514.5 ps) of the SDL
moved the upper branch by 3 ps (positive) and lost the beam on the merger crystal - difficult to get it back |
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Shift summary, posted by Jörg Hallmann on 08 Aug 2024, 00:18
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optimization of seeding (still not as good as needed)
set position for the two color mode (difference 3-4 ev)
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Shift summary, posted by Romain Letrun on 29 Jul 2024, 23:22
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X-ray delivery
11.0 keV, 1-351 pulses @ 1.1 MHz, 300-1100 uJ.
Continuously decaying average intensity through the day.
Large intensity
gradient with long trains.
Optical laser delivery |
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Shift summary, posted by Giuseppe Mercurio on 29 Jul 2024, 06:45
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## Shift summary night July 28th-29th
Achievements:
- we saw signal on both MCPs (with a voltage of around 1500 V). We used the MCPs to measure XAS at Cu L edge at different theta angles from 120 |
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Shift summary, posted by Romain Letrun on 28 Jul 2024, 23:34
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X-ray delivery
11.0 keV, 1-352 pulses @ 1.1 MHz, 600-1100 uJ.
Even larger intensity gradient with long trains than yesterday.
Optical laser delivery |
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Shift summary, posted by Romain Letrun on 27 Jul 2024, 23:42
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X-ray delivery
- 9.22 and 11.0 keV, 1-352 pulses @ 1.1 MHz, 600-1400 uJ.
- Large intensity gradient with long trains (>70% drop with 352 pulses @ 1.1 MHz). |
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Issue, posted by Harald Sinn on 27 Jul 2024, 09:10
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SASE1: Solid attenuator att5 is in error. When it is tried to move it out, the arm lifts, but does not reach the final position before the software time-out.
We increased the software time-out from 4 seconds to 7 seconds, which didn't help. We suspect that there is a mechanical problem that prevents
the att5 actuator to reach the out position. |
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Shift summary, posted by Giuseppe Mercurio on 24 Jul 2024, 15:22
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Shift summary (Natalia, Giuseppe)
Achievements:
M1, M2 pitches adjusted
Grating AX changed value during shutdown, encoder offsets have been recalibrated
Set up
SCS, 9mrad, HEPM, grating configuration
Set up SCS, 9 mrad, HEPM, blank configuration
Problems: |
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Issue, posted by Harald Sinn on 24 Jul 2024, 11:35
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The control rack of the soft mono at SASE3 has some failure. Leandro from EEE will enter the XTD10 at 12:00.
Beam will be interupted for SAS1 and SASE3.
Estimate to fix it (if we are lucky) is one hour. |
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Issue, posted by Harald Sinn on 24 Jul 2024, 10:26
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In SASE2 undualtor cell 10 has issues. Suren K. will do a ZZ at 11:30 to fix it (if possible). Estimated duration: 1-3 hours.
Update 12:30: The problem is more severe than anticipated. Suren needs to get a replacement driver from the lab and then go back into the tunnel
at about 14:00 |
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Shift summary, posted by Idoia on 23 Jul 2024, 17:17
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ZZ access at XTD10
The
LE PM X and HE PM X motors were checked and they are not physically moving. It was also noticed that the encoders numbers aren't changing. -> second
ZZ was done and the problem was solved. (check entry https://in.xfel.eu/elog/XRO+Beam+Commissioning/412)
The SQS exit slit was checked |
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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). |