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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Shift summary, posted by Chan Kim on 20 Feb 2025, 23:29
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X-ray delivery
12.4 keV, 1.1mJ/pulse, 202 pulses/train at 0.56MHz
Focused NKB beam was used
Optical laser delivery
ns laser for jet visualization
Achievements/Observations |
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Shift summary, posted by Chan Kim on 19 Feb 2025, 21:25
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X-ray delivery
-12.4 keV, 202 pulses, 0.5 MHz, 1mJ/pulse
Optical laser delivery |
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Shift summary, posted by Tokushi Sato on 17 Feb 2025, 06:57
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X-ray delivery
up to 202 pulses per train (~1.9 mJ pulse energy)@9.3 keV, 0.5 MHz
Optical laser delivery |
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Shift summary, posted by Tokushi Sato on 16 Feb 2025, 06:46
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X-ray delivery
up to 202 pulses per train (~1.9 mJ pulse energy)@9.3 keV, 0.5 MHz
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Shift summary, posted by Tokushi Sato on 15 Feb 2025, 06:52
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X-ray delivery
up to 202 pulses per train (~1.9 mJ pulse energy)@9.3 keV, 0.5 MHz
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Shift summary, posted by Tokushi Sato on 13 Feb 2025, 07:24
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X-ray delivery
up to 352 pulses per train (~1.9 mJ pulse energy)@9.3 keV, 0.5 MHz ans 1.1 MHz. Beamdown for 40 min.
Optical laser delivery |
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Shift summary, posted by Tomas Popelar on 11 Feb 2025, 01:41
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SPB/SFX 7955 Day 4
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 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 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 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 Tokushi Sato on 08 Feb 2025, 00:00
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SPB/SFX 7955 Shift 1
**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 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 |
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 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 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 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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Status, posted by Frederik Wolff-Fabris on 01 Feb 2025, 15:40
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Saturday 01.Feb around 2AM machine went down due to problems with cold magnet at A20:
https://ttfinfo.desy.de/elog/XMLlist?file=/XFELelog/data/2025/05/31.01_n/2025-02-01T07:06:16-04.xml&xsl=/elogbook/xsl/elog.xsl&picture=true
During the early morning BKR used a diffrent trajectory at LINAC to continue lasing, altough with poor performance. |
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Shift summary, posted by Chan Kim on 31 Jan 2025, 21:24
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X-ray delivery
11.0 keV, up to 352 pulses at 1.1 MHz, 900 uJ.
Optical laser delivery
ns illumination and pp lasers
Achievements/Observations |
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SA3 status, posted by Frederik Wolff-Fabris on 31 Jan 2025, 12:43
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A ZZ is organized to happen now, 31.01 at ~12:40, in order to reset a cabinet belonging to one of the Apple-X undulators.
This is agreed with North Branch instruments and RC/BKR.
**Update 13:25: ZZ was successful; SA1 and SA3 beams restored at 13:25 |
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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 Chan Kim on 30 Jan 2025, 23:08
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X-ray delivery
11.0 keV, up to 178 pulses at 564 kHz, 650 uJ.
Optical laser delivery
illumination and pp lasers
Achievements/Observations |
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SA3 status, posted by Frederik Wolff-Fabris on 30 Jan 2025, 13:59
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On 29.01 evening the SA3 pre-absorber was interlocked due to M5 mirror.
With the help of Maurizio V., it was found the M5 RY motor has to be driven to 400um position to release the interlock condition and permit beam
to SXP and SQS. This relates to a limit switch which was in a undesired location and about 1mm out of position. |
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SA3 status, posted by Andreas Koch on 29 Jan 2025, 09:08
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The SA3 FEL imager is now protected via the Big Brother server, which creates a beam limit on the bunch pattern server if necessary.
contact Andreas Koch, Lars Fröhlich for more details or consult the imager manual, section 2.9:
https://docs.xfel.eu/share/page/site/xfelwp74/document-details?nodeRef=workspace://SpacesStore/1766b430-7c48-4c46-bb2d-1774d69e1246 |
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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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SA3 status, posted by Andreas Koch on 14 Jan 2025, 07:38
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The image intensifier in the SQS Exit Slit imager had been exchanged on request of SQS, Thomas Baumann.
Model: Hamamatsu MCP C9546-03-Y001 against C9546-01.
The position of the YAG screen on the camera is slightly shifted which may slightly affect the spectral axis, a few pixels vertically, and approximately |