Issue, posted by Raśl Villanueva-Guerrero on 25 Sep 2024, 10:12
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Issue with SA3 Gas attenuator (SA3_XTD10_GATT) - SOLVED
Dear all,
after the reported issue by SQS colleagues regarding the impossibility to inject Argon, and after a first remote evaluation, we (VAC) have entered
XTD10 to assess the status and verify the most probable working hypothesis: a manual valve in the supply line was closed (otherwise as expected). Joshua |
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Shift summary, posted by Idoia on 27 Jan 2024, 15:17
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SASE3
Open Issues:
- currently it is not possible to change the number of pulses because of Instruments beam permission interlock |
start of shift - status, posted by Antje Trapp on 10 Apr 2024, 16:35 
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Starting shift with mirror motor calibration:
- beam is centered on FEL imager
- pblm in XTD9 is inserted |
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start of shift - status, posted by Antje Trapp on 10 Apr 2024, 16:35
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Starting shift with mirror motor calibration:
- found solid attenuator 0.5mm silicon inserted
- beam is centered on FEL imager |
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M3 calibration, posted by Kelin Tasca on 10 Apr 2024, 17:03
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- M3 TX moved to 0 in steps of 1 mm and beam on FXE Pop-In corrected with M3 RY (+) and M2 RY
- Started calibration with M3 Rz in steps of 0.5 (+) and corrected with M2 RY and RZ to find a position with a minimum of parasitic motion
- Iterations with M3 TY |
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SASE1 MIRROR MOTORS CALIBRATED, posted by Antje Trapp on 11 Apr 2024, 21:54
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Dear all,
we calibrated the mirror vertical motors to their geometrically neutral.
Please be aware that saved values for beamline settings may no longer be valid. This mainly applies to the vertical motor positions, but will |
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M1 - M2 - M3 euler fine tuning geometriy parameters, posted by Antje Trapp on 19 May 2024, 14:49
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We fine tuned geometry parameters for linear effects on X motion (parallel offset) for all three mirrors.
dTz was corrected for M2 and M3 to -6.5mm (same geometry)
dTz was corrected for M1 to +6mm |
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HED 6keV after Euler MDL, posted by Antje Trapp on 19 May 2024, 15:20
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Compensation of M2 RY motor for the case of Piezo off, posted by Kelin Tasca on 18 Jun 2024, 13:03
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We plan to put the piezos of M2 off, in the (unprobable) case that this is the reason of the "jumps" in SASE3 trajectory.
Therefore, I measured the change on RY and RZ motors, to correct all the positions
Fig 1: initial position, Motors Ry=10.5425 and RZ=-14.7200 Piezo Ry =5 and Rz=5 |
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SASE2 end of shift summary, posted by Antje Trapp on 22 Jul 2024, 15:20
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Beam is now aligned back to HED for hand-over to Naresh (see picture)
points achieved:
-vibometer measurements on M2 at high energy, 2,1 and 3 mrad setting |
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SASE3 end of shift summary, posted by Antje Trapp on 22 Jul 2024, 15:27
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this morning, ZZ was done together with Sylvia Huynh (EEE) to solve softmono pre-mirror motor issue https://redmine.xfel.eu/issues/177392
The issue was solved and also mechanical functionality of the stage was checked.
After ZZ, the beamline remained interlocked. Hutches will be searched and closed tonight to allow final checks on Tuesday |
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Shift summary, posted by Idoia on 23 Jul 2024, 17:17
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ZZ access at XTD10
The
LE PM X and HE PM X motors were checked and they are not physically moving. It was also noticed that the encoders numbers aren't changing. -> second
ZZ was done and the problem was solved. (check entry https://in.xfel.eu/elog/XRO+Beam+Commissioning/412)
The SQS exit slit was checked |
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M1 Rz damaged - DO NOT MOVE!!!, posted by Antje Trapp on 30 Aug 2024, 13:02 6x
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What has happened:
During euler motion calibration of M1, we were driving the vertical motors by a few mm back and forth. At some point, the Rz motor went into error,
as we attempted to go further in negative direction. Resetting the axis several times did not solve the problem. The vertical motors were then moved to |
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Experiment summary, posted by Naresh Kujala on 28 Jan 2024, 19:55
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X-ray delivery
0.25nC, 14 GeV, rep rate 2.25 MHz, 9300 eV, 1 to 100 pulses, ~2000 uJ
M1 and M2 mirrors are aligned and beam trajectory to
SPB.
Goal |
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Issue, posted by Andreas Koch on 14 May 2024, 09:56
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EPS issue for Transmissive imager SA1 (OTRC.2615.T9) w.r.t Operation eLog #96
The motor screen positions w.r.t. the EPS switches had been realigned (last Wednesday 8th May), tested today (14th May) and the EPS is again
enabled for the different beam modes. All is back to normal. |
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SA1 status, posted by Andreas Koch on 26 Nov 2024, 09:47
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Concerning damage of the SA1 FEL imager, Operation-2024 eLog #206
The screen position of the YAG screen - when pressing the screen selection button - has been moved by 1 mm so that the damaged area is out of the |
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SA2 status, posted by Frederik Wolff-Fabris on 04 Nov 2024, 15:07
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Dear MID colleagues, Svitozar (PRC), Bolko and Shan (RCs),
This morning we faced the situation where MID was limited to 400 pulses (mode M) via the EPS signals. The current RF window set at the machine
allows to the requested 450 pulses. |
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Issue, posted by Tommaso Mazza on 17 Feb 2024, 08:15
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The cross on the FEL imager, which we use as a reference for BKR crew, is not centred on the GATT aperture. when was this changed, and why?
att. 1 and 2 show the current position (the saturated image aids the positioning of the GATT aperture).
att. 3 is from two weeks ago. then, the cross was centred on the GATT aperture. |
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Stability Issue, posted by Tommaso Mazza on 15 Mar 2024, 18:02
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it is not clear why, but the beam position on BIU2 has changed over time, even more since we checked last. it is off in both directions
we see the GATT aperture projection drifting, so it is a change in the beam transport, not in the source.
see the beam, cut by the DIAG1 slit, compared to the cross it should be centred to. |
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other, posted by Tommaso Mazza on 09 May 2024, 10:45
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we needed SASE1 to be set to 0 pulses briefly to check alignment in our experiment.
The FXE control hutch was empty. we could not reach either Chris nor Mykola by phone. The XFEL_StatusPublic shows that the FXE shutter is closed
(we can also see the exp hutch door open from outside the control hutch). |