Shift summary, posted by Tokushi Sato on 22 Feb 2024, 22:52
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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: |
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Shift summary, posted by Tokushi Sato on 23 Feb 2024, 23:03
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X-ray delivery:
stable and flat over 190 pulses per train. 1.1 MHz with ~200 uJ
Optical laser delivery: |
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Shift summary, posted by Tokushi Sato on 25 Feb 2024, 22:54
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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 |
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Shift summary, posted by Tokushi Sato on 25 Aug 2024, 22:37
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X-ray delivery
-12.40 - 12.82 keV, XDT9 XGM ~0.85 mJ, 3 hours interruption by vacuum issue on XTD9
Optical laser delivery |
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Shift summary, posted by Tokushi Sato on 26 Aug 2024, 23:05
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X-ray delivery
-12.40 - 12.82 keV, ~1.3 mJ
Optical laser delivery |
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Shift summary, posted by Tokushi Sato on 08 Sep 2024, 06:44
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X-ray delivery
12.8 keV, ~0.8 mJ
Achievements/Observations |
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Shift summary, posted by Tokushi Sato on 01 Oct 2024, 02:39
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X-ray delivery
6 keV, ~2.8 mJ, continuous beam drift in both direction
Optical laser delivery |
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Shift summary, posted by Tokushi Sato on 30 Nov 2024, 23:01
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X-ray delivery
19 keV, ~550 uJ, 1 - 128 pulses, stable delivery
Optical laser |
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Shift summary, posted by Tokushi Sato on 01 Dec 2024, 23:07
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X-ray delivery
19 keV, ~450 uJ, 1 - 128 pulses, stable delivery
Optical laser |
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Stability Issue, posted by Thomas Baumann on 26 May 2024, 21:56
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We asked the machine for two color mode in the morning. Tuning gave good results at first (1.6mJ second color, 100uJ first color), but as soon as any
of the colors was switched off and on again the pulse energy dropped (~600uJ) and BKR had to retune to even get a fraction of the pulse energy back back.
The same happened when changing the delay |
Issue, posted by Romain Letrun on 01 Feb 2024, 21:56 
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At 21:29:20 today, the number of bunches in SASE1 was increased from 1 to 352 without intervention of the SPB/SFX shift crew. 30 seconds later, the number
of bunches was reduced to 1, again without intervention from the SPB/SFX shift crew (see attachments 1 and 2).
We were in the middle of a measurement at that time and the sudden increase from 10 mW to 3.5 W average power resulted in the destruction of |
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Shift summary, posted by Romain Letrun on 02 Feb 2024, 00:04
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X-ray delivery
1-352 pulses at 10 keV, 1200 - 400 uJ.
Significant pulse energy slope within the train. Action on the kickers was eventually
performed leading to some reduction of the slope, though remaining still far from ideal. Decision to take the action took a very long time (2.5 hours).
Several |
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Shift summary, posted by Romain Letrun on 02 Feb 2024, 23:31
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X-ray delivery
1-64 pulses at 10 keV, ~1.1 mJ.
Overall stable delivery.
Optical laser delivery
NA
Achievements/Observations |
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Issue, posted by Romain Letrun on 13 Feb 2024, 08:52
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| 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). |
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Shift summary, posted by Romain Letrun on 15 Feb 2024, 09:32
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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 |
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Issue, posted by Romain Letrun on 27 Feb 2024, 09:56 8x
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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 |
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Shift summary, posted by Romain Letrun on 29 Feb 2024, 10:04
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X-ray delivery
10 keV, up to 160 pulses at 1.1MHz, 1.8 mJ
Optical laser
delivery |
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Shift summary, posted by Romain Letrun on 01 Mar 2024, 10:54
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X-ray delivery
10 keV, up to 128 pulses with custom bunch pattern, 1.6-2.0 mJ
Optical laser delivery
NA
Achievements/Observations |
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Issue, posted by Romain Letrun on 04 Mar 2024, 09:42
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The number of bunches during the last night shift kept being changed down to 24 by the device SA1_XTD2_WATCHDOG/MDL/ATT1_MONITOR020 acting on SA1_XTD2_BUNCHPATTERN/MDL/CONFIGURATOR.
This was not the case during the previous shifts, even though the pulse energy was comparable. Looking at the history of SA1_XTD2_WATCHDOG/MDL/ATT1_MONITOR020,
it looks like this device was started at 16:26:25 on Friday, 1st March. |
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Status, posted by Romain Letrun on 13 Mar 2024, 10:09 7x
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We checked the XTD2 attenuators following the intervention from XRO (compar ewith elog:37, before the intervention).
The wavefront shows similar distortions with the 75 and 150 um as earlier, which is not too surprising since the cracks are vertical.
Attachments 1-5: Beam on SPB_XTD9_SCR with XTD2 attenuator CVDs |