Status, posted by Jan Gruenert on 27 Sep 2024, 15:17
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Bunch pattern SA1 / SA3
SQS requests to change the bunch pattern.
Currently SA1/SA3 run interleaved as 131313...
The first bunch in the train (for SA1, non-lasing in SA3) nevertheless is visible as a small pre-peak in the diode signal which SQS uses to check |
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Shift summary, posted by Jörg Hallmann on 27 Sep 2024, 01:51
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started initial alignment for the ptycho experiment
Continued with XPCS measurement using the levitation device
issues: contribution of the 2nd harmonic of 8 keV at 16 keV visible on the Jungfrau detector - surpressing via mirror alignment not successful |
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Shift summary, posted by Chan Kim on 26 Sep 2024, 23:12
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X-ray delivery
6 keV, ~2.7 mJ, stable delivery
Optical laser delivery
ns laser for particle visualization
Achievements/Observations |
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Shift summary, posted by Jörg Hallmann on 26 Sep 2024, 01:46
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Started the day with vacuum & detector issues
real start of the experiments only at about 6 p.m.
measurement of a selection of samples (urea, ludox) using the levitation device |
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Shift summary, posted by Chan Kim on 25 Sep 2024, 23:36
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X-ray delivery
6 keV, ~2.8 mJ, stable delivery
Optical laser delivery
ns laser for particle visualization
Achievements/Observations |
Issue, posted by Chan Kim on 25 Sep 2024, 16:53 
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600um thick CVD diamond (XTD2 attenuator) seems damaged
Attachment 1: 600um thick CVD diamond (Arm 4) OUT |
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Issue, posted by Raúl Villanueva-Guerrero on 25 Sep 2024, 10:12
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Issue with SA3 Gas attenuator (SA3_XTD10_GATT) - SOLVED
Dear all,
after the reported issue by SQS colleagues regarding the impossibility to inject Argon, and after a first remote evaluation, we (VAC) have entered
XTD10 to assess the status and verify the most probable working hypothesis: a manual valve in the supply line was closed (otherwise as expected). Joshua |
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Issue, posted by Jan Gruenert on 25 Sep 2024, 09:47
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Issue with SA3 Gas attenuator (SA3_XTD10_GATT)
9h06: SQS informs PRC that the Argon line in GATT is not reacting on pressure change commands,
no GATT operation, which is required to reduce pulse energies for alignment. VAC-OCD is informed.
ZZ access is required to check hardware in the tunnel XTD10. |
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SA1 status, posted by Peter Zalden on 21 Sep 2024, 09:50
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The xray beam drifted significantly on wednesday and thursday (18. and 19.) but then was not drifting on friday (20.), see attached trendline of the
M2 actuator that kept the beam at fixed position on M3.
Today also seems that beam pointing is stable. But unclear what happened earlier... |
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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 Raphael de Wijn on 15 Sep 2024, 23:12
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X-ray delivery
8.951 keV, 1.6 mJ up to 16 pulses at 113 kHz
Achievements/Observations |
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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 Raphael de Wijn on 14 Sep 2024, 23:13
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X-ray delivery
8.951 keV, 1.2 mJ up to 30pulses at 113 kHz
Achievements/Observations |
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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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Status, posted by Peter Zalden on 14 Sep 2024, 01:33
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FXE received the beam and did not change accelerator settings.
Beam alignment to FXE was re-established using the new values for the old M1/M2 offset.
Monochromator aligned to the SPB energy setpoint. |
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Shift end, posted by Adam Round on 13 Sep 2024, 23:17
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On Shift: TS, FT, CK, AR, PS
X-ray delivery
8.951 keV, 1.6 mJ up to 200 pulses at 0.5 MHz (intesity drops off at end of train) |
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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 end, posted by Adam Round on 12 Sep 2024, 23:48
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X-ray delivery
8.951 keV, 1.6 mJ
Achievements/Observations |
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Shift summary, posted by Romain Letrun on 10 Sep 2024, 07:26
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X-ray delivery
12.8 keV, 1-20 pulses at 47 kHz, 500-700 uJ.
Pulse energy constantly decaying since ~3:00.
Achievements/Observations
Continuous SFX data collection since 00:10.
Issues |
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Issue, posted by Peter Zalden on 09 Sep 2024, 23:19
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| Finally, the drift velocity of the pointing reduced approx a factor of 2 as compared to yesterday, see attached. Possibly it will still converge... |