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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Issue, posted by Jan Gruenert on 18 Apr 2024, 23:19
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22h55:
HED informs that they have issues with the HED pulse picker in XTD6. It affects the ongoing experiment, but not to an extent that they cannot continue
the beamtime. |
Shift summary - night shift, posted by JP, Hauke, Samuele on 23 Mar 2023, 00:27 7x
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22 Mar 2023, 23:30 Handover from late shift
Tasks for the night:
source point measurement
Sample alignment
timing
23 Mar 2023, 00:39 Source point measurement |
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Issue, posted by Harald Sinn on 05 Feb 2023, 15:18
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15:15 SCS called and reported an issue with one of the motors of the SCS exit slit. DOC already looked at the problem and could not make the motor
move. XRO (Maurizio) is now informed and looks at the problem
17:10 ZZ access to XTD by Maurzio and Mikako |
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Issue, posted by Harald Sinn on 14 Mar 2023, 10:56
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The longitudinal feedback on SA1/3 was swicthed off by mistake over night. When it will be switched on, the beam may wiggle a bit an SA1+SA3 for
short.
We agreed with SCS and FXE that this will be done today at 11:30 |
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Issue, posted by Harald Sinn on 14 Mar 2023, 14:40
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In order to optimise the performance of SASE2 self seeding, a stronger compression setting is required.
The RC proposed to increase the time window between SASE2 and SASE1/3 to avoid performance degradation and cross talk effects on SASE1/3.
I discussed with SCS and FXE instruments and there seems to be nothing against moving the time trigger by 30 micro seconds later, as proposed |
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Issue, posted by Harald Sinn on 14 Mar 2023, 20:26
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SCS could only use two pulses, because the SXP imager was still in the beam and SXP shutter open.
I removed the SXP imager, so SCS can now get the full beam. The SXP shutter is still open and SXP instrument contacted via email to find out,
if the shutter is intentionally open. |
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Status, posted by Harald Sinn on 25 Jul 2023, 19:18
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After the 12 hour cryo failure last night, it was decided to exchange a faulty window with some reduced transmission at the injector laser today
(see email by Andreas to xo-info yesterday).
This was sucessful and the injector tunnel was closed today 16:40 and restart of the gun is ongoing. Tomorrow ramp up and SASE tuning. |
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Status, posted by Harald Sinn on 28 Jul 2023, 14:46
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As discussed, there will be a beam interuption form 14:45 until probably 15:45 related to jitter studies at A1 that the BKR would like to try out.
Harald |
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Status, posted by Harald Sinn on 28 Jul 2023, 15:37
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Good news: The 'jitter'-tests was sucessful and BKR could identify the jitter source related to a wrong software setting around the AH1 module
of injector.
This was now fixed and the jitter has disappeared |
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Issue, posted by Harald Sinn on 29 Jul 2023, 17:57
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The hutch search of SASE3, SXP became defective around 5am.
DESY MPS group replaced a defective warning light unit and now it seems ok. |
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Shift end, posted by Harald Sinn on 03 Oct 2023, 22:58
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End of Euler shift: all 3 SASE2 mirrors are now working with the Euler MDL.
We left the beamline aligned to HED, with M1,M2 on Pt for upcoming HED experiment at 18 keV.
Pre-absorber closed, CRL1 out, Solid attenuater with some diamonds. |
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Late shift summary, posted by Giuseppe, Sergii on 03 Mar 2023, 23:25
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achievements:
change the optical laser to 2 um
found focus of 2 um beam
found saptial overlap
course timing was checked
looking
for fine timing using SiN
problems: |
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Morning Shift summary, posted by Giuseppe, Andreas on 30 Jul 2023, 18:35
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achievements:
calibration of exit slits
measurement of Cu L3 edge
moved hRIXS to nominal settings for Cu L3 edge
problems:
hRIXS motors could not be moved remotely, the problem was finally understood: GTZ had been moved manually into an interlock condition, |
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Morning shift summary, posted by Giuseppe Mercurio, Teguh Asmara on 07 Jun 2023, 15:04
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achievements:
FEL beam realignment because pointing was off since we had 0 pulses during the night
coarse timing was found
knife
edge scans of FEL to achieve twice the PPL beam size
problems: |
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shift summary, posted by Giuseppe Mercurio, Teguh Asmara on 02 Aug 2023, 06:44
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achievements:
beam transport with the second half of undulators closed
measured pulse energy in SCS hutch and verified that the transmission
of the beamline with hr grating is as previously reported
knife edge scans along vertical direction to find focus (<=11 um) and horizontal |
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night shift summary, posted by Giuseppe Mercurio, Teguh Asmara on 04 Aug 2023, 07:10
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achievements:
changed the LEPM to optimize resolution
found 140 meV
problems:
were not able to recover settings found because it is difficult to reproduce LEPM positions
plan: |
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last late shift UP3463, posted by Giuseppe Mercurio, Laurent Mercadier on 23 Apr 2023, 23:38
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Achievements
Beam transport
Coarse and fine timing
XAS on Co
Aligned HSLIT, pinhole, camera beamstop
Characterize
FEL beam size and position on curved grating
PPL Power measurement
Fluence scan on sample of optical laser and FEL to determine good |
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end of shift summary, posted by Giuseppe Mercurio, Laurent Mercadier on 28 Jul 2023, 14:56
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achievements:
found new M2 bender position for focusing using blank
tried to use unfocused beam for ESLITS calibration, but could not see
it at SCSPopin, only at M5 Popin
we moved the XRD chamber laterally, closer to hRIXS, to be able to cut the beam using the sample at grazing |
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Shift summary, posted by Giuseppe Mercurio, Diego, Martin, Amina on 05 May 2023, 06:33
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achievements:
inserted the magnet and measured delay scan at the maximum magnetic field with opposite directions
data analysis showed that
runs measured during the afternoon/evening led to sample degradation (the sample shows a dark spot, change in the scattering signal is also cearly visible)
corrected |