end of shift summary, posted by Antje Trapp on 25 Jan 2024, 14:57
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It was possible to align to HED in parasitic mode to seeding tests
mirror horizontal position (coating stripes) was optimized as far as possible under parasitic conditions
vertical motors calibration and EulerMDL calibration still to be done - collimated beam needed for that. |
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end of shift summary, posted by Antje Trapp on 26 Jan 2024, 15:24
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Vertical motors of M3 now calibrated in first iteration and gemetrical neutral calibrated to 0 in motor settings!!!
New HED positions saved in XRO setpoints 'C'
euler calibration not completed for M3 |
Diamond detector / DDM commissioning, posted by Wolfgang Freund on 26 Nov 2022, 10:40 
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beam: 30 keV / 30 uJ
reduce to single bunch for insertion
put FEL imager in |
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Status, posted by Theophilos Maltezopoulos on 16 Jan 2023, 11:33
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| I started the upstream XGMs in XTD2, XTD1, and XTD10. |
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Analyze and quantify the mispositioning of the new 4mm-aperture behind the undulator, posted by Jan Gruenert on 21 Jan 2023, 16:38
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Goal: Analyze and quantify the mispositioning of the new 4mm-aperture behind the undulator
Positions in tunnel:
ABSP4.2422.SA2 = ABSP4.CELL37.SA2 L_z position 2422.558m
Last closed undulator for this test is cell16 at 2294m (at end of |
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SA3 status, posted by Andreas Koch on 08 Feb 2023, 11:14
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Bunch number control - SA3 FEL imager
As announced today in the XO meeting the SA3 FEL imager has a new feature, see screenshot, encircled:
- In case of danger for the YAG screen the bunches SA3 are set to "0" via the BunchPatternServer (SA3 Main scene). |
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Status, posted by Naresh Kujala on 23 Mar 2023, 13:07
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Update for elog 99:
Now Gotthard timing is changed to new setting for 0.5 MHz.
attached screenshot with gothard timing setting |
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SPB_XTD9_IMGPII45 lost steps - REPAIRED, posted by Jan Gruenert on 10 Apr 2023, 02:16
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REPAIRED / FIXED
Problem: The imager SPB_XTD9_IMGPII45 insertion motor lost steps and kept the machine to maximum 2 bunches per train.
Mitigation by DOC/EEE/PRC on 8 April 2023: made sure that screen seems actually out of beam and took imager out of interlock |
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Issue, posted by Jan Gruenert on 10 Apr 2023, 02:25
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REPAIRED / FIXED
Problem: The imager SPB_XTD9_IMGPII45 insertion motor lost steps and kept the machine to maximum 2 bunches per train.
Mitigation by DOC/EEE/PRC on 8 April 2023: made sure that screen seems actually out of beam and took imager out of interlock |
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Issue, posted by Andreas Koch on 13 Apr 2023, 15:29
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Trigger issue with SXP_XTD10_IMGES - Exit Slit imager
The external trigger of the Navitar camera was not set, fixed now.
The single pulse trigger of the imager: MCP + camera is tested and correctly working. |
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Shift end, posted by Jan Gruenert on 13 Apr 2023, 15:57
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End of Diamond Sensor Study
We leave the SASE2 beamline in the following safe state:
Pre-Abs inserted
Solid ATT with T=0.001
All CRLs OUT
All imagers OUT
|
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Status, posted by Naresh Kujala on 06 Jun 2023, 08:28
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SA2 photon beamline
- SRA position were 7 mm x 7 mm, MID reported they see the hallow of beam shadow at MID Popin
- I have closed the SRA to 3.5 mm x 3.5 mm |
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Shift start, posted by Jan Gruenert on 19 Jun 2023, 09:37
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Rampdown day activities
The main focus is as usual on checking all tunnel components and to identify any potential
issues that could be fixed during the maintenance period which will be starting this wednesday. |
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New screens installed in FEL imager SA3, posted by Andreas Koch on 21 Jun 2023, 15:12
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YAG screen
The damaged screen "YAG2" with Al coating had marks and had been exchanged.
The Imager Watchdog now protects the screen - operational for some months i.e. the number of bunches is shut down to zero if the intensity at the |
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Issue, posted by Theophilos Maltezopoulos on 13 Oct 2023, 10:19
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An XGM has two single-shot detectors, XGMD and HAMP.
The XTD2 XGMD amplifiers are damaged, thus I operate the XTD2 XGM with HAMP, which I usually use at > 18 keV.
In summary, the XTD2 XGM is fully operational, but I do not have a spare detector any more! Thus, a ZZ is organized for Monday 16.10. around |
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SA2 status, posted by Jan Gruenert on 10 Nov 2023, 17:39
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End of 30 keV study
The machine finished their attemps for 30 keV tuning while using NEPAL injector laser, unfortunately unsuccessful.
They could not obtain lasing, and all the pulse energy shown during the day on the level of about 20 uJ was only background, no lasing (as |
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Status, posted by Jan Gruenert on 28 Nov 2023, 19:36
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Ramp down activities completed by XPD. References:
SASE1
https://in.xfel.eu/elog/SASE1+technical+commissioning/2204
https://in.xfel.eu/elog/SASE1+technical+commissioning/2205
https://in.xfel.eu/elog/SASE1+technical+commissioning/2206
SASE2
https://in.xfel.eu/elog/SASE2+technical+commissioning/1206
...until...
https://in.xfel.eu/elog/SASE2+technical+commissioning/1209
SASE3
https://in.xfel.eu/elog/SASE3+technical+commissioning/2220
https://in.xfel.eu/elog/SASE3+technical+commissioning/2221
The
XFEL photon beam was switched off as planned at 19h00 sharp. |
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SA2 status, posted by Frederik Wolff-Fabris on 16 Feb 2023, 14:04
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Data for the Horizontal jitter at the HED Pop-In was observed during beam delivery on cw05 (03-05.Feb) and cw07 (14-16.Feb) (see attached pictures).
We have a similar base jitter in both periods of beam delivery to HED, ranging from a minimum of 50-60um to around 80-100um in both operational
weeks. |
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SA3 status, posted by Frederik Wolff-Fabris on 12 May 2023, 16:12
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The SA3 EPS power limit at the Big brother was disabled to allow photon energy scans in SQS (due to Kr resonance at XGM, invalid power values are generated
and then beam is blocked);
Action was performed by Lars F. (RC), Michaela Petrich (PRC) and F. Wolff-Fabris (XO) with Accelerator RPO. |
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Vacuum Leak in SA2-XTD1 Solid Attenuator - [SOLVED] - Preliminary report, posted by Raúl Villanueva-Guerrero on 09 Jun 2023, 15:41
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Dear all,
After the incidences reported yesterday and the diagnostic remotely done (where we could narrow down the root cause to the edge-welded below
at the Linear stage of the arm Nr. 6 - 2.4 mm CVD diamond], we confirmed this as a fact during the schedule access today. Here is a succint summary of |