Shift summary, posted by Tokushi Sato on 26 Apr 2025, 06:55
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Staff: PV, TS, JK + external collaborators
X-ray delivery:
10 keV, ~ 800 uJ, 128 pulses, tuning was needed for 10 min. |
Issue, posted by Romain Letrun on 17 Mar 2025, 06:51 
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| The status of the FXE shutter in the Public status display DOOCS panel is incorrect. Here appears as opened, when it is actually closed. |
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Shift summary, posted by Raphael de Wijn on 05 Feb 2025, 23:42
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X-ray delivery
up to 202 pulses per train (~1 mJ pulse energy), 0.5 MHz.
Optical laser delivery
PP laser aligned to the interaction point
Achievements/Observations |
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Shift summary, posted by Raphael de Wijn on 06 Feb 2025, 23:13
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X-ray delivery
up to 202 pulses per train (~1.4 mJ pulse energy), 0.5 MHz.
Optical laser delivery
OPO issue in the late shift
PP laser aligned and timed both at the interaction point and in PAM
Achievements/Observations |
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Issue, posted by Raphael de Wijn on 06 Feb 2025, 23:24
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| Damage on FEL imager was also seen by our morning shift around 7:50am. |
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Shift summary, posted by Raphael de Wijn on 08 Feb 2025, 23:44
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SPB/SFX 7955 Day 2
**X-ray delivery**
* up to 202 pulses per train (~1.4 mJ pulse energy), 0.5 MHz. |
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Shift summary, posted by Raphael de Wijn on 10 Feb 2025, 00:56
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SPB/SFX 7955 Day 3
X-ray delivery
up to 202 pulses per train (~1.4 mJ pulse energy), 0.5 MHz. |
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Shift summary, posted by Raphael de Wijn on 12 Mar 2025, 23:14
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SPB/SFX shift summary user experiment 6933 (setup day)
X-ray delivery
-9.6-9.72 keV with Hirex monitoring, 1.4-1.8 mJ/pulse, 352 pulses/train at 1.1 MHz pulse repetition rate, short pulses |
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Issue, posted by Peter Zalden on 06 Feb 2025, 23:02
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We observed a damage spot on the SA1 FEL imager. It moves with the target holder, but not sure if its damage on the optical mirror or on the target itself.
This issue is not critical, but can become problematic in case one wants to determine beam size or state of optics (ATT or CRLs) upstream. |
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Shift summary, posted by Peter Zalden on 07 Feb 2025, 05:56
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Preparation for user expt #7944
X-ray delivery
since pulses (10 Hz) at 9.3 keV, 3 mJ
Pointing stability 55 um RMS in the horizontal plane on FXE PI, which is lower as compared |
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Shift summary, posted by Peter Zalden on 08 Feb 2025, 06:25
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Preparation for user expt #7944
X-ray delivery
Since pulses (10 Hz) at 9.3 keV, 2.2 mJ
Again similar low pointing noise
Achievements/Observations |
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Shift summary, posted by Peter Zalden on 09 Feb 2025, 06:35
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Preparation for user expt #7944
X-ray delivery
Single pulses (10 Hz) at 9.3 keV, 2.3 mJ
Again similar low pointing noise
Achievements/Observations |
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Shift summary, posted by Mohammad Vakili on 21 Feb 2025, 23:21
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SPB/SFX shift summary user experiment 8039
**X-ray delivery**
-15 keV with Hirex monitoring, 0.5 mJ/pulse, 202 pulses/train at 0.56 MHz pulse repetition rate |
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Issue, posted by Martin Dommach on 01 Mar 2025, 11:53
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Due to issues SCS has with pulses from SASE1 lasing in SASE3 and destroying,
or at least modifying, their sample, it was decided to change the order
in the RF configuration to have SASE3 pulses before SASE1. The change will be done at 12 pm, agreed with FXE. |
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Issue, posted by Konopkova Zuzana on 24 Apr 2025, 08:42
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self-seeding level in SA2 is currently very low (~100 uJ, about 50% in the pedestal), need more information on how to proceed - is there any chance to
improve the seeding, or should we consider going to sase operation. |
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Shift summary, posted by Jörg Hallmann on 31 Jan 2025, 06:28
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Alignment of KB mirrors: focused beam H150-200nm x V300-350nm. Characterization of focused beam with wire scan.
Installed ePIX table
and ePIX. Thorlabs server is not running, needs to be fixed by controls during the morning shift
Aligned rotation center of SSRY and put the
beam into it. Moved alignment pin down by 10mm and put protecting cover on it.
Aligned DES spectrometer crystal (using YAG) to 9keV.
Checked |
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Shift summary, posted by Jayanath Koliyadu on 25 Feb 2025, 02:41
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X-ray delivery
-15 keV with Hirex monitoring, 0.5 mJ/pulse, 202 pulses/train at 0.56 MHz pulse repetition rate
Optical laser delivery |
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Shift summary, posted by Jayanath Koliyadu on 24 Apr 2025, 06:56
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X-ray delivery:
10 keV, ~ 900 uJ, 128 pulses, tuning was needed for few hours
Achievements / Observations: |
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Issue, posted by Jan Gruenert on 19 Jan 2025, 11:46
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1) BKR calls SUN11h20 and informs about issues with the SA1 SRA. Motors in ERROR.
2) Additionally, there was this morning a fire alarm, where in one rack (SASE1 rack 1.1 in XTD2) the gas extinguishing system was triggered,
see also https://ttfinfo.desy.de/XFELelog/show.jsp?dir=/2025/03/19.01_M&pos=2025-01-19T10:22:14 |
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Stability Issue, posted by Jan Gruenert on 07 Apr 2025, 15:35
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SASE1 pulse energy drops slowly three times
SASE1 XGM detects three times during the morning some slow drop in puls
energies from the SASE1 undulator.
The machine cannot find any correlation with any electron diagnostics. |