Shift summary, posted by Jörg Hallmann on 25 May 2023, 01:59
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optimization of seeding ongoing
tasks achieved during alignment:
- polarizer aligned |
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Shift summary, posted by Tokushi Sato on 21 May 2023, 18:38
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X-ray delivery
9.3 keV, 800 uJ, 1-200 pulses, stable delivery
Optical laser delivery
None
Achievements/Observations |
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Shift summary, posted by Tokushi Sato on 19 May 2023, 18:39
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X-ray delivery
9.3 keV, 800 uJ, 1-200 pulses, stable delivery
Optical laser delivery
None
Achievements/Observations |
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Shift summary, posted by Tokushi Sato on 18 May 2023, 18:41
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X-ray delivery
9.3 keV, ~1 mJ, 1-30 pulses, stable delivery
Optical laser delivery
None
Achievements/Observations |
Issue, posted by Tommaso Mazza on 14 May 2023, 05:33 
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SA3 GATT has trouble in setting the pressure at ~0.5mbar. setting any value between 0.5 and 0.6 will have it settle around 0.48.
It turns out the GATT cannot tune the pressure between 0.48 and 0.62mbar. tuning pressure continuously to keep transmission constant gets us
in the need of that range eventually. the problem is that at 0.48mbar the valve V30740S is at 100%. the minimum opening of the next valve V307030S gets |
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14.8 keV SPB 2mrad Alignment, posted by Maurizio Vannoni on 13 May 2023, 22:18 6x
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Mirror positions and beam position on the imagers for 14.8 keV SPB, 2mrad
ATTENTION: the alignment was difficult due to the strong background from SA3 with 500 pulses. For the future, maybe SA3 could reduce to single
pulse during alignment of SA1. This would make the process easier. |
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Shift summary, posted by Romain Letrun on 12 May 2023, 23:21
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X-ray delivery
9.3 keV, 1.8 mJ, 202 pulses most of the day.
Attempted tuning to 14.8 keV during the first hour fo the shift did not work
out. More time will be spent tomorrow morning tuning to that photon energy.
Overall stable delivery. Only a magnet failure at 20:25 resulted |
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SA3 status, posted by Frederik Wolff-Fabris on 12 May 2023, 16:12
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The SA3 EPS power limit at the Big brother was disabled to allow photon energy scans in SQS (due to Kr resonance at XGM, invalid power values are generated
and then beam is blocked);
Action was performed by Lars F. (RC), Michaela Petrich (PRC) and F. Wolff-Fabris (XO) with Accelerator RPO. |
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Shift summary, posted by Romain Letrun on 11 May 2023, 23:48
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X-ray delivery
9.3 keV, 1.4-1.8 mJ and 12 keV, 1.1 mJ. 202 pulses most of the day.
Reduced slope after afternoon tuning, down to 20%.
Change
to 12 keV with file prepared earlier this week did not work (no lasing). Tuning to 12 keV took 40 minutes.
30 minutes downtime in the morning.
Optical |
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Attention, posted by Michaela Petrich on 11 May 2023, 09:21
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Dear all,
I just got the information for BKR that due to a failed klystron we had a downtime around 8:40am this morning for about 30 mins.
Operation could be restarted successfully afterwards but with a different energy distribution than before. SASE2 has now reduced pulse energy |
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Shift summary, posted by Konopkova Zuzana on 11 May 2023, 05:07
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beam parameters: 18 keV, 1 pulse on demand, 400 uJ
achieved:
VISAR calibrations
timing between X-rays, VISAR laser and DIPOLE laser
main shots with DIPOLE energies up to 35 |
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Shift summary, posted by Romain Letrun on 10 May 2023, 23:23
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X-ray delivery
9.3 keV, 1.6 mJ, 202 pulses msot of the day.
Slope across the train reduced comapred to yesterday, now about 25%.
Changes
in number of pulses in SASE3 not always automatically picked-up by kickers adaptation and requiring a nudge from BKR to restore performances.
Beam |
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Shift summary, posted by karen appel on 10 May 2023, 09:51
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for 9th of May - 10th of May: user experiment 2740 , first users with DIPOLE100-X long pulse laser
Took beam at 18 keV with roughly 450 muJ
M1 and M2 Mirrors on Pt stripe, M3 on B4C and with Tx = 4 |
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Shift summary, posted by Romain Letrun on 09 May 2023, 23:09
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X-ray delivery
9.3 keV, 1.8 mJ, 202 pulses most fo the day. Pronounced (~30-40%) slope across the train.
Pointing initially far off the reference
crosshair. One hour required at the start of the shift to go to 9.3 keV and align the beam to the crosshair.
Optical laser delivery |
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Attention, posted by Jan Gruenert on 08 May 2023, 09:04
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Info from XRO (Maurizio Vannoni) to PRC concerning tunnel access request #152936 (Inspection and repair of SQS ESLIT)
- The ZZ-access will be done by Marc Planas, Massimiliano Di Felice, and Idoia Freijo.
- They will start their access between 9h00 and 9h30 and end their access by 12h30. |
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Shift summary, posted by Jan-Etienne Pudell on 08 May 2023, 02:38
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Stable beam delivery with 23keV and 140µJ at 2.2, 1.1 and 0.55MHz
User data acquisition during the day interrupted by storage and detector DAQ problems: |
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Late shift summary 07.05.2023, posted by Sergii, Phuong on 07 May 2023, 23:11
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Achivments:
-Move DSSC closer to the sample.
-Measure delay scans for opposite magnetic field. |
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morning shift summary, posted by Giuseppe Mercurio on 07 May 2023, 14:47
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achievements
exchanged He dewar and managed to cool down the sample again after vacuum issue last night
started collecting additional scattering
data with alternating magnetic field on large nanoparticles sample
problems |
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shift summary, posted by Giuseppe Mercurio on 07 May 2023, 06:52
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achievements:
measured delay scans on 16 nm samples at different magnetic fields (4 runs) before the problem below appeared
problems:
scroll pump of the FFT degraded, rough vacuum got worse, this led to pump in error state and interlock valves. The scroll pump was replaced, |
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Shift summary, posted by Jan-Etienne Pudell on 07 May 2023, 02:23
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We had stable x-ray delivery with 120µJ and up to 300 pulses.
Successful user data acquisition of water and water+THF samples at various supercooled states |