Shift summary, posted by Chan Kim on 17 Apr 2025, 01:39
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X-ray delivery
18.8 keV, 260 uJ pulse energy
Optical laser delivery
No optical laser
Achievements/Observations |
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Shift summary, posted by Tokushi Sato on 14 Apr 2025, 23:08
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X-ray delivery:
20 keV, 250-400 uJ, 250 pulses, stable delivery
Optical Laser: |
Status, posted by Jan Gruenert on 14 Apr 2025, 09:50 
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Beam Downtime
During last night, apparently the photon beam was down in all SASE beamlines during two longer periods:
between 2:48am and 3h23am (35 min) on 14.4.2025
between 5:09am and 6h59am (1 hour 50 min) on 14.4.2025
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Shift summary, posted by Tokushi Sato on 13 Apr 2025, 22:55
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Staff: PV, TS, JK, FK, + users
X-ray delivery:
20 keV, ~ 300-400 uJ, 250 pulses, stable delivery |
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Shift summary, posted by Tokushi Sato on 12 Apr 2025, 23:15
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X-ray delivery:
20 keV, ~ 500 uJ, 246 pulses, stable delivery
Optical Laser: |
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Shift summary, posted by Tokushi Sato on 11 Apr 2025, 23:14
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X-ray delivery:
20 keV, ~ 400 uJ, 246 pulses, stable delivery
Optical Laser: |
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Shift summary, posted by Tokushi Sato on 10 Apr 2025, 23:17
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X-ray delivery:
20 keV, ~ 400 uJ, 128 pulses, stable delivery
Optical Laser: |
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Shift summary, posted by Tokushi Sato on 09 Apr 2025, 22:46
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X-ray delivery:
20 keV, ~ 400 uJ, 128 pulses, stable delivery
Optical Laser: |
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SA3 status, posted by Jan Gruenert on 09 Apr 2025, 10:22
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SASE3 Apple-X undulator cell 26 issue - SOLVED
During the night, an issue appeared with the SASE3 undulator cell 26 (2nd last Apple-X undulator).
This cell could not be operated and was in status open. |
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Issue, posted by Jan Gruenert on 09 Apr 2025, 09:41
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SASE1 XTD2 attenuator arm issue
On monday 7.4.2025, one of the SASE1 attenuator arms (SA1_XTD2_ATT/PNACT/A9) with a 2mm Silicon attenuator got stuck when inserted
EEE reports in the XO meeting today that DOC / EEE helped to unblock and remove it from the beam |
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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. |
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SA1 status, posted by Harald Sinn on 07 Apr 2025, 07:19
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7:15 SPB reports large background from non-lasing SASE3 bunches. BKR is informed.
7:50 BKR analysed situation. Everything concerning the orbits is OK, so the background is due to the standard spontaneous background (about <
1% level of FEL beam). With SASE3 running currently 255 lasing bunches and SASE1 single bunch the intensities will be on a similar level. Recommendation |
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SA2 status, posted by Harald Sinn on 06 Apr 2025, 06:33
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5:49 HED called and they have problems with the Laser Sync signal. A change of laser delay is not possibe. We supsect that it is similar to earlier this
week at FXE, where a crash of a sync CPU caused a similar error. BRK is informed and tries to reach somebody from sync Group via email (at 6:35, no OCD
phone number available) . If this does not work, we will work with the shifts starting at 7:00 on this (DOC and new BKR crew). |
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SA1 status, posted by Harald Sinn on 03 Apr 2025, 07:34
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7:20 FXE reports a problem with laser synchronisation (yellow warning light and could not change delay). BKR informs the DESY laser sync group.
7:51 DESY sync group reported that there was a CPU failing about 6 am this morning which led to the yellow warning light. However, synchronisation
was very likely all the time ok withing 5-10fs. The CPU was now reset and everything should be wokring now. |
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Shift end, posted by Tokushi Sato on 27 Mar 2025, 22:57
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**X-ray delivery:**
* 16 keV, ~upto 1 mJ, 160 pulses
**Optical Laser:** |
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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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Status, posted by Harald Sinn on 15 Mar 2025, 19:49
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MID called and reported issue with Dachs terminals at the user labs (probably no power). TS was informed. Because the lab are currently accessible
(doors are locked open), TS will take care about it on Monday. |
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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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Shift summary, posted by Tokushi Sato on 04 Mar 2025, 07:05
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X-ray delivery
up to 188/352 pulses per train (~1 mJ pulse energy)@13.4 keV, 0.5/1.1 MHz
Optical laser delivery |
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Shift summary, posted by Tokushi Sato on 03 Mar 2025, 07:05
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X-ray delivery
up to 188 pulses per train (~1 mJ pulse energy)@13.4 keV, 0.5 MHz
Optical laser delivery |
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Shift summary, posted by Tokushi Sato on 02 Mar 2025, 06:56
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X-ray delivery
up to 175 pulses per train (~1 mJ pulse energy)@13.4 keV, 0.5 MHz
Optical laser delivery |
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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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Shift summary, posted by Tokushi Sato on 01 Mar 2025, 06:56
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X-ray delivery
up to 202/352 pulses per train (~0.8 mJ pulse energy)@13.4 keV, 0.5/1.1 MHz
Optical laser delivery |
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Shift summary, posted by Tokushi Sato on 28 Feb 2025, 06:57
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X-ray delivery
up to 202/352 pulses per train (~0.8 mJ pulse energy)@13.4 keV, 0.5/1.1 MHz
Optical laser delivery |
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Shift summary, posted by Tokushi Sato on 27 Feb 2025, 07:02
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X-ray delivery
up to 202/352 pulses per train (~0.8 mJ pulse energy)@13.4 keV, 0.5/1.1 MHz
Optical laser delivery |
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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 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 |
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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 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 |