Shift summary, posted by Jörg Hallmann on 29 Feb 2024, 02:41
|
Stable seeding with 1mJ + 400mJ SASE
HIREX triggered interlock when all attenuators are removed
successful test of nano focusing setup |
SA1 status, posted by Peter Zalden on 28 Feb 2024, 08:57 
|
5.61 keV setpoint in SA1 was confirmed to correspond to 5.660 keV (+/- 0.003 keV), see attached.
The user expt #5644 can proceed as planned. |
|
Issue, posted by Peter Zalden on 28 Feb 2024, 06:57
|
Not sure if this is the cause of the fringes reported before, but at 5.6 keV there are clear cracks visible on the XTD2 Attenuators 75 umm and 150um
CVD, see attached. There is also a little bit of damage on the 600 um CVD, but not as strong as the others.
At 5.6 keV we will need to use the thin attenuators. I will mention again in case this causes problems downstream. |
|
Issue, posted by Romain Letrun on 27 Feb 2024, 09:56 8x
|
The status of the XTD2 attenuators has been checked during the experiment last week and many were found to cause disturbances in the wavefront ranging
from mild to severe.
Attachment 1: No attenuator |
|
Shift summary, posted by Motoaki Nakatsutsumi on 26 Feb 2024, 14:32
|
Shift summary for 2024-02-25 from 11:00 to 2024-02-25 at 14:00:
Self-seeding at 8.5 keV, with approximately 500 μJ per pulse.
Overall, the performance of x-ray self-seeding remains good, and users are happy. Pointing stability is also exceptional. However, enhancing |
|
Shift summary, posted by Tokushi Sato on 25 Feb 2024, 22:54
|
X-ray delivery
9.10 keV; 190 pulses per train @1.1 MHz with roughly 170-200 uJ; stable delivery
Optical laser delivery
ns laser for particles visualization
Achievements/Observations |
|
Shift summary, posted by Motoaki Nakatsutsumi on 25 Feb 2024, 14:47
|
Shift summary for 2024-02-24 from 07:00 to 2024-02-25 at 14:00:
Self-seeding at 8.5 keV, with approximately 500 μJ per pulse. Following re-tuning around 10 am on the 25th, the energy per pulse increased
to around 600 μJ. |
|
Shift summary, posted by Johan Bielecki on 25 Feb 2024, 00:11
|
X-ray delivery
9.10 keV; 190 pulses per train @1.1 MHz with roughly 140-200 uJ; observed some fluctuation in the photon flux
Optical laser delivery |
|
Shift summary, posted by Motoaki Nakatsutsumi on 24 Feb 2024, 11:58
|
Shift summary 2024-02-23 07:00 - 2024-02-24 10:00
We got self-seeding at 8.5 keV very quickly after changeover from 10.5 keV operation finished at 2024-02-23 07:00.
Pulse energy ~ 600 uJ. |
|
Shift summary, posted by Tokushi Sato on 23 Feb 2024, 23:03
|
X-ray delivery:
stable and flat over 190 pulses per train. 1.1 MHz with ~200 uJ
Optical laser delivery: |
|
Shift summary, posted by Tokushi Sato on 22 Feb 2024, 22:52
|
X-ray delivery: stable and flat over 190 pulses per train. 1.1 MHz with 200 uJ short intervention needed to improve intensity after it dropped
Optical laser delivery: NA
Achievements/Observations: |
|
Shift summary, posted by Peter Zalden on 22 Feb 2024, 06:13
|
Beam conditions:
Used photon energies between 6 and 7 keV, including short undulator scans
Continuously got 1 mJ despite the short pulse mode
that's running
Bandwidth was found to be 18 eV FWHM at 6.07 keV (0.3%) by monochromator scan against fixed undulator setpoint
Achievements: |
|
Shift summary, posted by Tokushi Sato on 21 Feb 2024, 23:00
|
X-ray delivery: stable and flat over 250 pulses per train. 1.1 MHz with 400 uJ
Optical laser delivery: NA
Achievements/Observations: |
|
Issue, posted by Tommaso Mazza on 17 Feb 2024, 08:15
|
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. |
|
Shift summary, posted by Romain Letrun on 15 Feb 2024, 09:32
|
X-ray delivery
1 to ~332 pulses at 6 keV, 4.5 mJ
Stable delivery
Number of pulses limited by the Photon Beam Power local limit
that is set to 16 W. Is this intentional? All other limits are set to 40 W
Achievements/Observations |
|
Experiment summary, posted by Konopkova Zuzana on 13 Feb 2024, 08:55
|
*Achievements :
- Generally rather successful with very high quality beam parameters
- We had a nearly steady 800 uJ+ HXRSS flux during the user run and ~ 4mJ SASE during the setup at HED. |
|
Issue, posted by Romain Letrun on 13 Feb 2024, 08:52
|
| Like after the previous winter maintenance period, the shutter of FXE appears as opened in DOOCS panels even though it is closed (https://in.xfel.eu/elog/OPERATION-2023/58). |
|
Shift summary, posted by Giuseppe Mercurio on 13 Feb 2024, 06:38
|
shift summary
Andreas, Giuseppe
continued pumpprobe measurements
around 5:30 we could not see any image at the MTE3 camera (after sample transfer), we tried |
|
Shift summary, posted by Tokushi Sato on 13 Feb 2024, 01:02
|
X-ray delivery
1-350 at 12.45 keV, 1600 uJ. Stable delivery
Optical laser delivery
None
Achievements/Observations |
|
Shift summary, posted by Tokushi Sato on 11 Feb 2024, 23:04
|
X-ray delivery
1-350 at 12.45 keV, 1700 uJ. Stable delivery
Optical laser delivery |