Late shift summary 06.08.2023, posted by Sergii, Andreas on 06 Aug 2023, 23:20
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Achievements:
-Re-alighned beam transport from the FEL soource as we seen low phon counts on the spectrometer
-Optimized spectrometer at 1000l/mm grating |
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Night Shift Summary on 15.08.2023, posted by Sergii Parchenko, Manuel Harder on 17 Aug 2023, 11:06
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Achievements:
Replaced focusing lens of PP laser and measured focus with knife edge, focus is about 720 micron vert. & 600 horizontal. Horizontal
x-ray spot size is 220 micron
Adapted fluence calibration for the new spot sizes
Optimized spatial and temporal overlap with new |
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Night shift summary on 16.08.23, posted by Sergii Parchenko, Manuel Harder on 17 Aug 2023, 11:09
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Achievements
Acquired tr-RIXS data with 4.0 mJ/cm² laser power for 21 delays between -2 and +10 ps at 853 eV. including static XAS and dark hRIXS
runs. Totally collected 210 minutes of data i.e. 10 minutes per delay
Acquired tr-RIXS data with 4.0 mJ/cm² laser power for 21 delays between |
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Late shift sumamry 03.05.2023, posted by Sergii Parchenko on 04 May 2023, 00:52
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Achivments:
- X-ray and Laset spot size calibration
- Course timing check |
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Late shift summary 22.10.2023, posted by Sergii , Giacomo on 23 Oct 2023, 01:38
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Achievements
-Check XAS and static RIXS after the beam was back
-Do the warm up cycle to remove ice from the sample surface |
Issue, posted by Romain Letrun on 28 Feb 2023, 07:17 
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| In the public status display, it looks like FXE is taking the beam even though their shutter is closed. |
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Issue, posted by Romain Letrun on 23 Mar 2023, 11:38
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When using 1.13 MHz X-ray repetition rate, SASE1 HIREX is capturing two pulses in a single frame giving the impression that there are more peaks within
the spectrum than there are in reality.
This was verified by recording data with one and two pulses per train, which are shown in attachment. |
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Status, posted by Romain Letrun on 23 Mar 2023, 14:31
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After SASE1 HIREX GOTTHARD reconfiguration, we now get a single pulse per frame. This was verified by comparing data from HIREX recorded with 564 kHz
and 1.13 MHz X-ray repetition rates. Both intensity and number of peaks is comparable for the two repetition rates. |
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Shift summary, posted by Romain Letrun on 19 Apr 2023, 07:04
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X-ray delivery
12.0 keV, 1.3 mJ, 1-168 pulses @ 564 kHz
Decaying intensity between 1:20 and 2:40, otherwise stable delivery.
Optical
laser delivery |
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Shift summary, posted by Romain Letrun on 20 Apr 2023, 06:58
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X-ray delivery
12.0 keV, 1.3 mJ, 1-168 pulses @ 564 kHz.
Stable delivery.
Optical laser delivery
1030 nm compressed, THG.
Stable delivery.
Achievements/Observations |
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Shift summary, posted by Romain Letrun on 21 Apr 2023, 04:33
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X-ray delivery
12.0 keV, 1.3 mJ, 1-168 pulses @ 564 kHz
Cryo issue at 3:33
Optical laser delivery
1030 nm compressed, THG.
Stable delivery.
Achievements/Observations |
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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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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 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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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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Shift summary, posted by Romain Letrun on 30 May 2023, 23:02
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X-ray delivery
10.7 keV, up to 339 pulses at 1.1 MHz.
Large slope through the train, up to 70% with 339 bunches. BKR was not able to find
the cause so far, we agreed to pursue this further tomorrow.
Achievements/Observations |
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Shift summary, posted by Romain Letrun on 31 May 2023, 23:15
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X-ray delivery
10.65 keV, 128 pulses at 1.13 MHz and 16 pusles at 141 kHz.
Slope reduced at the start of the shift. Approximately 20% slope
after that with the patterns used for data collection today.
Optical laser delivery |
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Shift summary, posted by Romain Letrun on 01 Jun 2023, 23:27
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X-ray delivery
10.65 keV, 128 pulses at 1.13 MHz and 16 pusles at 141 kHz.
Overall stable delivery.
Optical laser
delivery |
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Shift summary, posted by Romain Letrun on 02 Jun 2023, 23:34
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X-ray delivery
10.65 keV, 128 pulses at 1.13 MHz, 1.6-1.7 mJ.
Overall stable delivery.
Optical laser delivery
800 nm, 50 fs, 226 pulses at 1.13 MHz.
Achievements/Observations |
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Shift summary, posted by Romain Letrun on 03 Jun 2023, 23:40
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X-ray delivery
10.65 keV, up to 339 pulses at 1.13 MHz, 1.6-1.8 mJ.
12.4 keV, up to 30 pulses at 1.13 MHz, 1.0-1.2 mJ.
Beam not
aligned to the crosshair at 12.4 keV, but we could work with it as it is to avoid further tuning.
Overall stable delivery.
Optical |