Shift summary, posted by Wonhyuk Jo on 04 Feb 2024, 23:36
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Goal Achieved.
- Finished flat field measurement for AGIPD at different scenarios for upcoming user experiments.
- Aligned the spectrometer at DES and obtained the energy spectrum of 9 keV SASE. |
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Shift summary, posted by Wonhyuk Jo on 11 Aug 2024, 02:15
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Found the spatial overlap on the Suna microscope with Zyla.
Found the SDL motor position giving 200 fs time difference between the upper and lower branches.
The encoder and current values of DC2_CASZ and DC1_CASZ are not 100 % correlated. |
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Shift summary, posted by Wonhyuk Jo on 12 Aug 2024, 02:07
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Found spatial overlap at Suna microscope with Zyla cam.
The splitting ratio was obtained about 1:1.
The spatial jittering from upper and lower branch were investigated. |
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Shift summary, posted by Wonhyuk Jo on 13 Aug 2024, 02:04
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Found the interference fringe at Suna microscope with Zyla cam from MID split-and-delay line.
The fringe patterns were recorded as a function of delay controlled by the upper branch motor position.
Obtained the interference fringe patterns with two pulses with different repetition rate of machine. |
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Shift summary, posted by Wonhyuk Jo on 13 Sep 2024, 02:16
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- DAQ was crashed after taking darks of AGIPD. It was solved by DOC and OCD.
- Laser could not switched from optical to RF lock. Solved by OCD (using doocs).
- Energy scan was attempted, which was not successful. |
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Shift summary, posted by Wonhyuk Jo on 14 Sep 2024, 02:23
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- The seeding optimization result: Total 450 uJ (Seeding of 150 uJ + SASE of 300 uJ). BKR will be able to start optimization on Saturday
around noon if necessary.
- The pump-probe (PP laser and PuMa pulse) experiment data on the substrate peak was collected. |
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Shift summary, posted by Wonhyuk Jo on 15 Sep 2024, 02:16
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- The seeding optimization is ongoing, which was not successful. Now we have a total of 170 uJ including SASE and seeding.
- The option to switch to SASE is relatively not complex and can be done with the support of BKR without a seeding expert. BKR expects to
provide about (more than) 1 mJ. To be discussed with user later. |
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Shift summary, posted by Wonhyuk Jo on 16 Sep 2024, 02:21
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- Pump-probe experiments are being conducted using PuMa and PP laser.
- The user program is ongoing over the night.
Tomorrow, |
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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 Ulrike Boesenberg on 31 Oct 2024, 02:43
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12.389keV, HXRSS, 1-400+ bunches, 450uJ
Seeding alignment
Beamline alignment (Mirror + foccussing)
Measured energy and moved it the requested value
Cryos
for sample and monochromator are prepared
Aligned DES spectrometer
Started with DCCM characterization (440)
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Issue, posted by Tommaso Mazza on 17 Feb 2024, 08:15 
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The cross on the FEL imager, which we use as a reference for BKR crew, is not centred on the GATT aperture. when was this changed, and why?
att. 1 and 2 show the current position (the saturated image aids the positioning of the GATT aperture).
att. 3 is from two weeks ago. then, the cross was centred on the GATT aperture. |
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Stability Issue, posted by Tommaso Mazza on 15 Mar 2024, 18:02
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it is not clear why, but the beam position on BIU2 has changed over time, even more since we checked last. it is off in both directions
we see the GATT aperture projection drifting, so it is a change in the beam transport, not in the source.
see the beam, cut by the DIAG1 slit, compared to the cross it should be centred to. |
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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 Tomas Popelar on 04 Dec 2024, 07:12
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X-ray delivery
19 keV, ~ 400 - 450 uJ, 1 - 128 pulses, stable delivery
Optical laser |
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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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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: |