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. |
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Shift summary, posted by Tokushi Sato on 25 Apr 2025, 06:48
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X-ray delivery:
10 keV, ~ 850 uJ, 128 pulses, tuning was needed for 1 hour
Optical Laser: |
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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 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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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. |