Issue, posted by Frederik Wolff-Fabris on 15 Nov 2024, 10:50
|
SA2 cell#5 undulator segment moved at ~09:45AM Fri to 25mm without aparent reason and undulator experts need a ZZ to exchange power supply; FEL
instensity dropped from 230uJ to 60uJ s consequence.
RCs are preparing south branch for the iminent ZZ. HED is informed. |
Issue, posted by Frederik Wolff-Fabris on 12 Nov 2024, 10:07 
|
- While FEL IMG with YAG screen was inserted in SA1, EPS/MPS was not limited to the expected 2 bunches, but to 30 bunches;
- It was found
the condition #3 ("SA1_XTD2_VAC/Switch/SA1_PNACT_Close") at the EPS Mode-S was disabled which should be always enabled;
- Condition
#3 has been enabled again and now SA1 is limited to 2 bunches, as expected when YAG screen is inserted.
Further investigations will be done to |
|
SA2 status, posted by Frederik Wolff-Fabris on 04 Nov 2024, 15:07
|
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. |
|
Shift summary, posted by Raphael de Wijn on 03 Nov 2024, 00:00
|
X-ray delivery
12.5 keV, ~1.6 mJ
Achievements/Observations: |
|
Shift summary, posted by Ulrike Boesenberg on 31 Oct 2024, 02:43
|
12.389keV, HXRSS, 1-400+ bunches, 450uJ
Seeding alignment
Beamline alignment (Mirror + foccussing)
Measured energy and moved it the requested value
Cryos
for sample and monochromator are prepared
Aligned DES spectrometer
Started with DCCM characterization (440)
|
|
SA1 status, posted by Peter Zalden on 28 Oct 2024, 09:58
|
This is to report some findings during operation that should be looked into (mostly to avoid in the future, because both negatively affect data quality
of the user expt at FXE):
At the moment, the 99:1 mode affects 4 to 5 pulses out of 100 in SA1, see first screenshot that shows in the top right the IPM reading |
|
Shift summary, posted by Chan Kim on 25 Oct 2024, 05:51
|
X-ray delivery
12.4 keV, ~1.4 mJ
|
|
Shift summary, posted by Chan Kim on 24 Oct 2024, 06:51
|
X-ray delivery
12.4 keV, ~1.4 mJ
Achievements/Observations
Beam is through the inline mic
Flight tube vacuum optimized
Beam trajectory up to JF4M manually optimized
EHC |
|
Status, posted by Naresh Kujala on 07 Oct 2024, 16:34
|
Desy Laser group has fixed the issue about the laser Synchronization.
https://ttfinfo.desy.de/XFELelog/show.jsp?dir=/2024/41/07.10_M&pos=2024-10-07T14:51:12
Naresh |
|
Issue, posted by Naresh Kujala on 07 Oct 2024, 15:15
|
14:40hr
FXE and HED reported the laser synchronization issue. Informed to Machine RC.
LbSync team couldn't fixed this issue remotely and on there way to Schenefeld to fix this issue. |
|
Shift summary, posted by Tokushi Sato on 01 Oct 2024, 02:39
|
X-ray delivery
6 keV, ~2.8 mJ, continuous beam drift in both direction
Optical laser delivery |
|
Shift summary, posted by Jörg Hallmann on 30 Sep 2024, 01:50
|
01:49
Worked on the XPCS analysis packages |
|
Shift summary, posted by Chan Kim on 30 Sep 2024, 01:13
|
**X-ray delivery**
- 6 keV, ~2.8 mJ, continuous beam drift in vertical direction (both XTD2 & XTD9 XGMs)
**Optical laser delivery** |
|
Stability Issue, posted by Chan Kim on 29 Sep 2024, 22:29
|
X-ray beam is continuously drifting in the vertical direction (XTD9_XGM)
It affects our NKB focus and focused beam is also drifting continuously. |
|
Status, posted by Jan Gruenert on 29 Sep 2024, 12:13
|
Beam is back. Current status:
SASE1 (SPB/SFX)
2.72 mJ, 352 bunches/train, 6 keV
SASE2 (MID)
880 uJ,
1 bunch/train, 8 keV
SASE3 (SQS)
4.56 mJ, 1 bunch/train, 400 eV (3.1nm)
|
|
Issue, posted by Jan Gruenert on 29 Sep 2024, 11:42
|
A2 failure - downtime
The machine / RC informs (11h22) that there is an issue with the accelerator module A2 (first module in L1, right after
the injector).
This causes a downtime of the accelerator of 1 hour (from 10h51 to 11h51), affecting all photon beamlines. |
|
Shift summary, posted by Chan Kim on 29 Sep 2024, 00:07
|
**X-ray delivery**
- 6 keV, ~2.8 mJ, stable delivery
**Optical laser delivery** |
|
Shift summary, posted by Jörg Hallmann on 28 Sep 2024, 23:42
|
continued with the evaluation of the XPCS analysis packages
investigated the effect of alignment optimizations and forced misalignments on the contrast directly with the online XPCS tool
checked additional standard samples |
|
Shift summary, posted by Jörg Hallmann on 28 Sep 2024, 01:31
|
started with data acquisition for the ptycho experiment with different geometries
started with XPCS measurements of capillaries using the FSSS |
|
Shift summary, posted by Chan Kim on 27 Sep 2024, 23:13
|
X-ray delivery
6 keV, ~3.0 mJ, stable delivery
Optical laser delivery
ns laser for particle visualization
Achievements/Observations |
|
Status, posted by Jan Gruenert on 27 Sep 2024, 15:17
|
Bunch pattern SA1 / SA3
SQS requests to change the bunch pattern.
Currently SA1/SA3 run interleaved as 131313...
The first bunch in the train (for SA1, non-lasing in SA3) nevertheless is visible as a small pre-peak in the diode signal which SQS uses to check |
|
Shift summary, posted by Jörg Hallmann on 27 Sep 2024, 01:51
|
started initial alignment for the ptycho experiment
Continued with XPCS measurement using the levitation device
issues: contribution of the 2nd harmonic of 8 keV at 16 keV visible on the Jungfrau detector - surpressing via mirror alignment not successful |
|
Shift summary, posted by Chan Kim on 26 Sep 2024, 23:12
|
X-ray delivery
6 keV, ~2.7 mJ, stable delivery
Optical laser delivery
ns laser for particle visualization
Achievements/Observations |
|
Shift summary, posted by Jörg Hallmann on 26 Sep 2024, 01:46
|
Started the day with vacuum & detector issues
real start of the experiments only at about 6 p.m.
measurement of a selection of samples (urea, ludox) using the levitation device |
|
Shift summary, posted by Chan Kim on 25 Sep 2024, 23:36
|
X-ray delivery
6 keV, ~2.8 mJ, stable delivery
Optical laser delivery
ns laser for particle visualization
Achievements/Observations |
|
Issue, posted by Chan Kim on 25 Sep 2024, 16:53
|
600um thick CVD diamond (XTD2 attenuator) seems damaged
Attachment 1: 600um thick CVD diamond (Arm 4) OUT |
|
Issue, posted by Raúl Villanueva-Guerrero on 25 Sep 2024, 10:12
|
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 |
|
Issue, posted by Jan Gruenert on 25 Sep 2024, 09:47
|
Issue with SA3 Gas attenuator (SA3_XTD10_GATT)
9h06: SQS informs PRC that the Argon line in GATT is not reacting on pressure change commands,
no GATT operation, which is required to reduce pulse energies for alignment. VAC-OCD is informed.
ZZ access is required to check hardware in the tunnel XTD10. |
|
SA1 status, posted by Peter Zalden on 21 Sep 2024, 09:50
|
The xray beam drifted significantly on wednesday and thursday (18. and 19.) but then was not drifting on friday (20.), see attached trendline of the
M2 actuator that kept the beam at fixed position on M3.
Today also seems that beam pointing is stable. But unclear what happened earlier... |
|
Shift summary, posted by Wonhyuk Jo on 16 Sep 2024, 02:21
|
- Pump-probe experiments are being conducted using PuMa and PP laser.
- The user program is ongoing over the night.
Tomorrow, |
|
Shift summary, posted by Raphael de Wijn on 15 Sep 2024, 23:12
|
X-ray delivery
8.951 keV, 1.6 mJ up to 16 pulses at 113 kHz
Achievements/Observations |
|
Shift summary, posted by Wonhyuk Jo on 15 Sep 2024, 02:16
|
- The seeding optimization is ongoing, which was not successful. Now we have a total of 170 uJ including SASE and seeding.
- The option to switch to SASE is relatively not complex and can be done with the support of BKR without a seeding expert. BKR expects to
provide about (more than) 1 mJ. To be discussed with user later. |
|
Shift summary, posted by Raphael de Wijn on 14 Sep 2024, 23:13
|
X-ray delivery
8.951 keV, 1.2 mJ up to 30pulses at 113 kHz
Achievements/Observations |
|
Shift summary, posted by Wonhyuk Jo on 14 Sep 2024, 02:23
|
- The seeding optimization result: Total 450 uJ (Seeding of 150 uJ + SASE of 300 uJ). BKR will be able to start optimization on Saturday
around noon if necessary.
- The pump-probe (PP laser and PuMa pulse) experiment data on the substrate peak was collected. |
|
Status, posted by Peter Zalden on 14 Sep 2024, 01:33
|
FXE received the beam and did not change accelerator settings.
Beam alignment to FXE was re-established using the new values for the old M1/M2 offset.
Monochromator aligned to the SPB energy setpoint. |
|
Shift end, posted by Adam Round on 13 Sep 2024, 23:17
|
On Shift: TS, FT, CK, AR, PS
X-ray delivery
8.951 keV, 1.6 mJ up to 200 pulses at 0.5 MHz (intesity drops off at end of train) |
|
Shift summary, posted by Wonhyuk Jo on 13 Sep 2024, 02:16
|
- DAQ was crashed after taking darks of AGIPD. It was solved by DOC and OCD.
- Laser could not switched from optical to RF lock. Solved by OCD (using doocs).
- Energy scan was attempted, which was not successful. |
|
Shift end, posted by Adam Round on 12 Sep 2024, 23:48
|
X-ray delivery
8.951 keV, 1.6 mJ
Achievements/Observations |
|
Shift summary, posted by Romain Letrun on 10 Sep 2024, 07:26
|
X-ray delivery
12.8 keV, 1-20 pulses at 47 kHz, 500-700 uJ.
Pulse energy constantly decaying since ~3:00.
Achievements/Observations
Continuous SFX data collection since 00:10.
Issues |
|
Issue, posted by Peter Zalden on 09 Sep 2024, 23:19
|
| Finally, the drift velocity of the pointing reduced approx a factor of 2 as compared to yesterday, see attached. Possibly it will still converge... |
|
Shift summary, posted by Romain Letrun on 09 Sep 2024, 06:52
|
X-ray delivery
12.8 keV, 1 pulse, ~0.7 mJ
Achievements/Observations
Except for some downtime due to beam down, majority of the time was for data collection
6 windows of a chip collected, with |
|
Issue, posted by Peter Zalden on 08 Sep 2024, 20:30
|
We observe a continuous horizontal beam drift in SA1 after the M1 incident. It seems not to converge, so one can wonder where this will go....
Attached screenshot shows the M2 piezo actuator RY that keeps the beam at the same position on the M3 PBLM. These are about 130 m apart, The
drift is 1V/12 hours. 0.01V corresponds to a beam motion by 35 um. So the drift velocity is 0.3 mm/hour. In the past days this had at least once lead to |
|
Shift summary, posted by Tokushi Sato on 08 Sep 2024, 06:44
|
X-ray delivery
12.8 keV, ~0.8 mJ
Achievements/Observations |
|
M1 Rz damaged - DO NOT MOVE!!!, posted by Antje Trapp on 30 Aug 2024, 13:02 6x
|
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 |
|
Shift summary, posted by Chan Kim on 27 Aug 2024, 12:17
|
X-ray delivery
12.78 keV, ~1.3 mJ
Optical laser delivery
800 nm laser for jet visualization
Achievements/Observations |
|
Shift summary, posted by Tokushi Sato on 26 Aug 2024, 23:05
|
X-ray delivery
-12.40 - 12.82 keV, ~1.3 mJ
Optical laser delivery |
|
Shift summary, posted by Tokushi Sato on 25 Aug 2024, 22:37
|
X-ray delivery
-12.40 - 12.82 keV, XDT9 XGM ~0.85 mJ, 3 hours interruption by vacuum issue on XTD9
Optical laser delivery |
|
Shift summary, posted by Chan Kim on 24 Aug 2024, 23:09
|
X-ray delivery
-12.40 - 12.82 keV, XDT9 XGM ~0.81 mJ@ end of shift
Optical laser delivery |
|
Shift summary, posted by Peter Zalden on 23 Aug 2024, 08:48
|
Used 9.4 keV with 94 kHz wed and thu nights. Received approx. 0.9 mJ with large fluctuations in pulse energy, however acceptable for the tasks below.
Achievements:
X-ray optics and goniometer aligned for next user experiment 5725
Transmission through Mono #2 recovered and calibrated to |
|
Shift summary, posted by Raphael de Wijn on 22 Aug 2024, 23:15
|
X-ray delivery
12.40 - 12.82 keV, ~1.1 mJ
Optical laser delivery |
|
Shift summary, posted by Raphael de Wijn on 21 Aug 2024, 23:34
|
X-ray delivery
12.40 - 12.82 keV, ~1.1 mJ
Optical laser delivery |
|
Shift summary, posted by Wonhyuk Jo on 13 Aug 2024, 02:04
|
Found the interference fringe at Suna microscope with Zyla cam from MID split-and-delay line.
The fringe patterns were recorded as a function of delay controlled by the upper branch motor position.
Obtained the interference fringe patterns with two pulses with different repetition rate of machine. |
|
Shift summary, posted by Raphael de Wijn on 12 Aug 2024, 23:47
|
X-ray delivery
11.56 keV, 202 pulses @0.5 MHz, ~0.9 mJ, stable delivery
Optical laser delivery |
|
Shift summary, posted by Wonhyuk Jo on 12 Aug 2024, 02:07
|
Found spatial overlap at Suna microscope with Zyla cam.
The splitting ratio was obtained about 1:1.
The spatial jittering from upper and lower branch were investigated. |
|
Shift summary, posted by Raphael de Wijn on 11 Aug 2024, 23:07
|
X-ray delivery
11.56 keV 202 pulses @0.5 MHz, ~1.0 mJ
some downtime due to fire alarm in the tunnel |
|
Shift summary, posted by Romain Letrun on 11 Aug 2024, 14:33
|
Summary 06.08 - 10.08
X-ray delivery
9.3 keV, 1-352 pulses @ 1.13 MHz and 564 kHz, 1.4-1.8 mJ
11.56 keV 1-352 |
|
Shift summary, posted by Wonhyuk Jo on 11 Aug 2024, 02:15
|
Found the spatial overlap on the Suna microscope with Zyla.
Found the SDL motor position giving 200 fs time difference between the upper and lower branches.
The encoder and current values of DC2_CASZ and DC1_CASZ are not 100 % correlated. |
|
Attention, posted by Andreas Galler on 11 Aug 2024, 00:13
|
EPS Interlock change for Mode30:
the 3 HIREX Interlock conditions had been disabled
|
|
Issue, posted by Romain Letrun on 10 Aug 2024, 07:19
|
The SASE1 HIREX interlock is not working as expected.
At the position 'OUT' (step 2 in HIREX scene) and while none of the motors are moving, the interlock SA1_XTD9_HIREX/VDCTRL/HIREX_MOVING
is triggered, which prevents the use of more than two pulses. |
|
Shift summary, posted by Jörg Hallmann on 10 Aug 2024, 01:17
|
Found the delay time from upper and lower branches of SDL with a frosted-YAG.
The upper branch is -512.8 and the lower branch is -513.28.
The delay time difference is about 500 fs. |
|
Shift summary, posted by Jörg Hallmann on 09 Aug 2024, 01:59
|
optimized the SDL alignment
found timing of the upper (-520 ps) and lower branch (-514.5 ps) of the SDL
moved the upper branch by 3 ps (positive) and lost the beam on the merger crystal - difficult to get it back |
|
Shift summary, posted by Jörg Hallmann on 08 Aug 2024, 00:18
|
optimization of seeding (still not as good as needed)
set position for the two color mode (difference 3-4 ev)
|
|
Shift summary, posted by Romain Letrun on 29 Jul 2024, 23:22
|
X-ray delivery
11.0 keV, 1-351 pulses @ 1.1 MHz, 300-1100 uJ.
Continuously decaying average intensity through the day.
Large intensity
gradient with long trains.
Optical laser delivery |
|
Shift summary, posted by Giuseppe Mercurio on 29 Jul 2024, 06:45
|
## Shift summary night July 28th-29th
Achievements:
- we saw signal on both MCPs (with a voltage of around 1500 V). We used the MCPs to measure XAS at Cu L edge at different theta angles from 120 |
|
Shift summary, posted by Romain Letrun on 28 Jul 2024, 23:34
|
X-ray delivery
11.0 keV, 1-352 pulses @ 1.1 MHz, 600-1100 uJ.
Even larger intensity gradient with long trains than yesterday.
Optical laser delivery |
|
Shift summary, posted by Romain Letrun on 27 Jul 2024, 23:42
|
X-ray delivery
- 9.22 and 11.0 keV, 1-352 pulses @ 1.1 MHz, 600-1400 uJ.
- Large intensity gradient with long trains (>70% drop with 352 pulses @ 1.1 MHz). |
|
Issue, posted by Harald Sinn on 27 Jul 2024, 09:10
|
SASE1: Solid attenuator att5 is in error. When it is tried to move it out, the arm lifts, but does not reach the final position before the software time-out.
We increased the software time-out from 4 seconds to 7 seconds, which didn't help. We suspect that there is a mechanical problem that prevents
the att5 actuator to reach the out position. |
|
Shift summary, posted by Giuseppe Mercurio on 24 Jul 2024, 15:22
|
Shift summary (Natalia, Giuseppe)
Achievements:
M1, M2 pitches adjusted
Grating AX changed value during shutdown, encoder offsets have been recalibrated
Set up
SCS, 9mrad, HEPM, grating configuration
Set up SCS, 9 mrad, HEPM, blank configuration
Problems: |
|
Issue, posted by Harald Sinn on 24 Jul 2024, 11:35
|
The control rack of the soft mono at SASE3 has some failure. Leandro from EEE will enter the XTD10 at 12:00.
Beam will be interupted for SAS1 and SASE3.
Estimate to fix it (if we are lucky) is one hour. |
|
Issue, posted by Harald Sinn on 24 Jul 2024, 10:26
|
In SASE2 undualtor cell 10 has issues. Suren K. will do a ZZ at 11:30 to fix it (if possible). Estimated duration: 1-3 hours.
Update 12:30: The problem is more severe than anticipated. Suren needs to get a replacement driver from the lab and then go back into the tunnel
at about 14:00 |
|
Shift summary, posted by Idoia on 23 Jul 2024, 17:17
|
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 |
|
SASE3 end of shift summary, posted by Antje Trapp on 22 Jul 2024, 15:27
|
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 |
|
SASE2 end of shift summary, posted by Antje Trapp on 22 Jul 2024, 15:20
|
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 |
|
Compensation of M2 RY motor for the case of Piezo off, posted by Kelin Tasca on 18 Jun 2024, 13:03
|
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 |
|
Shift summary, posted by Jörg Hallmann on 14 Jun 2024, 01:53
|
continue with Tempus tests
continue with PAM commissioning (first results of the working device at MID)
comments: |
|
Shift summary, posted by Jörg Hallmann on 13 Jun 2024, 01:46
|
alignment of the instrument including collimation and beam shaping
test of the tempus detector using standard samples with different rep rates, intensities & # of pulses
start commissioning of the PhotonArrivalMonitor (temporal & spatial overlap, white light spectrum) |
|
Shift summary, posted by Abhisakh Sarma on 11 Jun 2024, 00:43
|
**X-ray delivery**
7.0 keV, up to 202 pulses at 564 kHz, 1.0 mJ.
**Optical laser delivery**
ns laser for jet illumination
**Achievements/Observations** |
|
Shift summary, posted by Chan Kim on 09 Jun 2024, 22:45
|
X-ray delivery
7.0 keV, up to 202 pulses at 564 kHz, 1.0 mJ.
Optical laser delivery
ns laser for jet illumination
Achievements/Observations |
|
Shift summary, posted by Giuseppe Mercurio on 09 Jun 2024, 22:21
|
Late Shift summary
Achievements:
- recovered the beam overlap |
|
Shift summary, posted by Abhisakh Sarma on 08 Jun 2024, 23:20
|
X-ray delivery
- 7.0 keV, up to 202 pulses at 564 kHz, 1.0 mJ.
- X-ray beam pointing changed at around 18:12 and it affects nano KB focus (from ~200nm to ~1um). |
|
Shift summary, posted by Natalia Gerasimova on 08 Jun 2024, 15:21
|
Morning shift on 08.06.2024 (Natalia, Teguh, Yi Ping)
Achievements:
Focus the KB to ca. 40 um
Found time zero using delay scan of the RIXS PFY
Found strong pump probe effect on the
Fe reference sample
Problems: |
|
Shift summary, posted by Chan Kim on 07 Jun 2024, 23:12
|
X-ray delivery
- 7.0 keV, up to 202 pulses at 564 kHz, 1.0 mJ.
- Average pulse energy was about 1.9 mJ on Tuesday and Wednesday. It has to be discussed with BKR tomorrow morning. |
|
Shift summary, posted by Giuseppe Mercurio on 07 Jun 2024, 15:19
|
Morning Shift Summary for 07.06.2024 (Teguh, Natalia)
Achievements:
Aligned the beamline to deliver the FEL beam into the hutch
Check the FEL beam size using knife-edge scans
Requested
BKR to re-tune the FEL to achieve higher pulse energy. They are still tuning, but we aim to reach 3 mJ per pulse
Problems: |
|
Shift summary, posted by Romain Letrun on 05 Jun 2024, 23:22
|
X-ray delivery
7.0 keV, up to 202 pulses at 564 kHz, 1.6-1.9 mJ.
Average pulse energy tuned up to 1.9 mJ at 14:45, but slow continuous decay
after that down to 1.7 mJ at the end of the shift.
45 minutes downtime in the morning and another 15 minutes to reset the IBFB later on, as |
|
Shift summary, posted by Romain Letrun on 04 Jun 2024, 23:38
|
X-ray delivery
7.0 keV, up to 202 pulses at 564 kHz, ~1.7 mJ.
Number of pulses initially limited to 178. Promptly addressed by BKR.
Optical laser delivery |
|
Shift summary, posted by Romain Letrun on 27 May 2024, 23:33
|
X-ray delivery
6.0 keV, up to 202 pulses at 564 kHz 1.3-1.8 mJ.
Decaying intensity through the day. Recovered once at 15:15 and slowly decaying
again after that.
Optical laser delivery |
|
Shift summary, posted by Konopkova Zuzana on 27 May 2024, 06:41
|
beam parameters: 2 colors at around 6.5 keV, 1 pulse
achievements:
user program continues with data acquisition at slightly varying photon energies (tens of eV both colors simultaneously) and at different delays |
|
Shift summary, posted by Romain Letrun on 26 May 2024, 23:23
|
X-ray delivery
6.0 keV, up to 202 pulses at 564 kHz, 1.8-1.9 mJ.
Stable delivery except for downtime at start of shift (until 7:15) and two
more hours in the morning.
Optical laser delivery |
|
Stability Issue, posted by Thomas Baumann on 26 May 2024, 21:56
|
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 |
|
Shift summary, posted by Romain Letrun on 26 May 2024, 00:23
|
X-ray delivery
6.0 keV, up to 202 pulses at 564 kHz and 101 at 282 kHz, 0.8-1.6 mJ
Low pulse energy after beam handover. Improved around
10:00.
~1.5 hour downtime due to issue with A5.
Several timing jumps of up to 1.5 ps visible on BAM and confirmed by X-ray/optical |
|
Issue, posted by Rebecca Boll on 25 May 2024, 02:38
|
Today in the afternoon, SASE1 was tuned (a description of the activities in att 4). We now realize that this has in some form changed the SQS pulse parameters.
att 1 shows ion spectra recorded under nominally the same photon parameters before (run 177) and after (run 247)
it's also visible in the history of the SASE viewer that the behavior of the SASE3 pulse energy is different before and after 15:45, which |
|
HED 6keV after Euler MDL, posted by Antje Trapp on 19 May 2024, 15:20
|
| |
|
M1 - M2 - M3 euler fine tuning geometriy parameters, posted by Antje Trapp on 19 May 2024, 14:49
|
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 |
|
Status, posted by Dirk Raiser on 17 May 2024, 10:42
|
Laser status:
After the laser issues listed in https://in.xfel.eu/elog/OPERATION-2024/99 the
late shift was finally able to find a timing setting for the amplifier trigger that was beyond stable settings under usual conditions, but which allowed |
|
Shift summary, posted by Romain Letrun on 14 May 2024, 11:49
|
X-ray delivery
11.56 keV, 1-197 pulses @ 564 kHz, 2.6 mJ.
Optical laser delivery
No PP laser output after shift change.
Achievements/Observations |
|
Issue, posted by Andreas Koch on 14 May 2024, 09:56
|
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. |
|
Shift summary, posted by Romain Letrun on 13 May 2024, 10:36
|
X-ray delivery
11.56 keV, 1-197 pulses @ 564 kHz, 2.4-3.1 mJ.
Beam down a bit over
1 hour due to accelerator interlock problem.
Optical laser delivery |
|
Shift summary, posted by Ulrike Boesenberg on 13 May 2024, 08:48
|
Weekend summary:
Overall stable beam delivery with 300bunches @18keV and 750uJ
-issue with XGM on Saturday night/morning |
|
Shift summary, posted by Romain Letrun on 12 May 2024, 07:35
|
X-ray delivery
11.56 keV, 1-352 pulses @ 1.13 MHz, 2.4-3.1 mJ. Stable delivery.
Intensity gradient with long train now slightly less than
20%.
Optical laser delivery |
|
Shift summary, posted by Romain Letrun on 11 May 2024, 07:20
|
X-ray delivery
11.56 keV, 1-352 pulses @ 1.13 MHz, 2.4-3.1 mJ. Stable delivery.
Intensity gradient with long train better than previous shifts
(~20% drop).
Optical laser delivery |
|
Shift summary, posted by Romain Letrun on 10 May 2024, 07:06
|
X-ray delivery
11.56 keV, 1-352 pulses @ 1.13 MHz, 2.6-3.1 mJ. Stable delivery.
Intensity gradient with long train could not be reduced by
BKR.
Optical laser delivery |
|
Issue, posted by Rebecca Boll on 10 May 2024, 00:04
|
our pp laser experienced timing jumps by 18 ns today. this happened for the first time at ~7:30 in the morning without us noticing and a couple of more
times during the morning. we realized it at 15:30 due to the fact that the signal on our pulse arrival monitor (X-ray/laser cross correlator downstream
of the experiment) disappeared. we spent some time to investigate it, until we also see this jump in two different photodiodes different triggers (oscilloscope |
|
other, posted by Tommaso Mazza on 09 May 2024, 10:45
|
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). |
|
Shift summary, posted by Romain Letrun on 09 May 2024, 07:14
|
X-ray delivery
11.56 keV, 1-352 pulses @ 1.13 MHz, 2.6-3.1 mJ.
Average intensity slowly decaying through the night.
Quite some
intensity gradient through the train (~35%).
Optical laser delivery |
|
Issue, posted by Raúl Villanueva-Guerrero on 08 May 2024, 13:51
|
Dear all,
Due to a probable issue at the SA1 Transmissive imager, the "OUT" and "YAG" position indication signals seems to be not responsive.
After the FXE team noticed that MODE S was interlocked, the root cause has been narrowed down to this component. Later, further investigation |
|
Experiment summary, posted by Konopkova Zuzana on 05 May 2024, 00:25
|
proposal 5700 finished on 04.05. The experiment used 352 pulses at 4.5 MHz and 18 keV to X-ray heat pressurized samples in diamond
anvil cells. Overall succesful on several samples.
Issues:
the requested 20.5 keV photon energy had too low pulse intensities
so we had to go down to 18 keV
pulse energies at 18 keV (300-400 uJ) were insufficient for some samples
the ramp in pulse envelope |
|
Shift summary, posted by Juncheng E on 03 May 2024, 23:31
|
X-ray delivery
- 9.3 keV, 3.1 mJ, 214 pulses/train at 1.1 MHz and 132 at 0.5 MHz
Optical later delivery |
|
Shift summary, posted by Juncheng E on 02 May 2024, 23:19
|
X-ray delivery
9.3 keV, 3.3 mJ, 190 pulses/train
Optical later delivery
For jet illumination
Achievements/Observations |
|
Shift summary, posted by Juncheng E on 01 May 2024, 23:31
|
X-ray delivery
9.3 keV, 3.3 mJ, 190 pulses/train
Optical later delivery
For jet illumination
Achievements/Observations |
|
Issue, posted by Andreas Galler on 01 May 2024, 16:39
|
840 pulses not possible at SXP due to big brother settings for the EPS Power Limit rule. The minimum pulse energy was assumed to be 6 mJ while the actual
pulse XGM reading is 550 uJ.
Solution: The minimum assuemd pulse energy had been lowered from 6 mJ to 2 mJ. This shall be reverted on Tuesday next week. |
|
Shift summary, posted by Jörg Hallmann on 27 Apr 2024, 02:11
|
optimized the FEL energy on the absorption edge of Iridium
measurements on the SDW
of Chromium with max magnetic discharges of the PUMA at different attenuations
changed the sample from Chromium to user samples
issues:
energy scan not efficiently working
poor seeding quality in long FEL trains |
|
Status, posted by Frederik Wolff-Fabris on 25 Apr 2024, 21:11
|
V0 valve for SA2 closed as the pump P22090I at HED branch enters in wrong state. This closed nearby vacuum valves for HED branch and consequently
V0. Vacuum levels at the section remained in 10^-9 all time.
Thanks to VAC-OCD Denis Finze we removed this pump signal from interlock to allow operation in SA2 at MID branch. Further investigation will |
|
Shift summary, posted by Jörg Hallmann on 25 Apr 2024, 01:50
|
instrument alignment including NaFos, DES spectrometer, diamond detector, PUMA & test samples
seeding makes a good impression based on the DES spectrometer |
|
Shift summary, posted by Raphael de Wijn on 22 Apr 2024, 23:26
|
End of User beamtime 5157
X-ray delivery:
21 keV, ~500 uJ; stable delivery
Optical Laser: |
|
Shift summary, posted by Raphael de Wijn on 22 Apr 2024, 00:06
|
User beamtime 5157 day 5
X-ray delivery:
21 keV, ~400 uJ
Optical Laser: |
|
SA2 status, posted by Jan Gruenert on 20 Apr 2024, 23:58
|
20.4.2024 / 22h51:
DOC informed PRC that the SASE2 topic broker had to be restarted.
The EPS power limit was reset by PRC to the previous value of 40 W. |
|
Shift summary, posted by Juncheng E on 20 Apr 2024, 23:37
|
Staff: JK, SB, JE, AS, RW, FK
**X-ray delivery:**
- 21 keV, ~500 uJ |
|
Status, posted by Jan Gruenert on 18 Apr 2024, 19:31
|
The intra-bunchtrain feedback (IBFB) was not active until today afternoon.
Although not strictly required or requested for the current week experiments,
it was decided to turn on this feedback, which should generally be active to |
|
Shift summary, posted by Peter Zalden on 13 Apr 2024, 23:03
|
Measurements to check the impact of bunch compression on FXE mono transmission were successful. We could change the peak current between 4 and 12 kA
and saw changes in bandwidth between 17 and 100 eV (at 14 keV). Results are under evaluation.
SA1 brought to safe state: |
|
SASE1 MIRROR MOTORS CALIBRATED, posted by Antje Trapp on 11 Apr 2024, 21:54
|
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 |
|
M3 calibration, posted by Kelin Tasca on 10 Apr 2024, 17:03
|
- 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 |
|
start of shift - status, posted by Antje Trapp on 10 Apr 2024, 16:35
|
Starting shift with mirror motor calibration:
- beam is centered on FEL imager
- pblm in XTD9 is inserted |
|
start of shift - status, posted by Antje Trapp on 10 Apr 2024, 16:35
|
Starting shift with mirror motor calibration:
- found solid attenuator 0.5mm silicon inserted
- beam is centered on FEL imager |
|
Status, posted by Harald Sinn on 10 Apr 2024, 11:55
|
Yesterday two motors of the SASE2 seeding mono were damaged. The mono was exchanged in the afternoon and pumped down. Currently, an issue with the vertical
cystal motion is being investigated. The vacuum improved much faster than expected after this intervention, so the hope is that the tunnel can
be searched soon and electrons could go through SASE2 already this afternoon. Watch for updates in the program for SASE2 in the DESY logbook under |
|
Shift end, posted by Marcin Sikorski on 08 Apr 2024, 06:37
|
In-house/commissioning beam time summary night 5
X-ray delivery:
12.7 keV, up to 128 pulses at 0.5MHz, ~1.3 mJ, one very short beam down. |
|
Shift summary, posted by Raphael de Wijn on 07 Apr 2024, 07:04
|
In-house/commissioning beam time summary night 4
X-ray delivery:
12.7 keV, up to 128 pulses at 0.5MHz, ~1.3 mJ, one very short beam down. |
|
Shift summary, posted by Raphael de Wijn on 06 Apr 2024, 07:06
|
Staff: MS, RB, PS, RdW
In-house/commissioning beam time summary night 3
X-ray delivery: |
|
Shift summary, posted by Raphael de Wijn on 05 Apr 2024, 07:14
|
In-house/commissioning beam time summary night 2
X-ray delivery:
12.7 keV, up to 288 pulses at 1.1MHz, ~1.2 mJ |
|
Shift summary, posted by Raphael de Wijn on 04 Apr 2024, 06:48
|
In-house/commissioning beam time summary night 1
X-ray delivery:
12.7 keV, up to 208 pulses at 1.1MHz, 1.1-1.5 mJ |
|
Shift end, posted by Adam Round on 31 Mar 2024, 23:20
|
X-ray delivery
12.72 keV, 10Hz, ~1.4 mJ/pulse, some beam drift in the horizontal direction observed (probably mirror related)
Optical
laser delivery |
|
Shift summary, posted by Chan Kim on 30 Mar 2024, 22:50
|
X-ray delivery
- 12.72 keV, 10Hz, ~1.4 mJ/pulse, continuous beam drift in the horizontal direction observed
Optical laser delivery |
|
Issue, posted by Chan Kim on 30 Mar 2024, 22:02
|
Continuous pointing drift in horizontal direction.
It may trigger a vacuum spike at SPB OH (MKB_PSLIT section) at 21:07 pm.
|
|
Issue, posted by Romain Letrun on 30 Mar 2024, 06:59
|
DOOCS panels are again incorrectly reporting the FXE shutter as opened when it is in fact closed. This had been fixed after it was last reported in February
(elog:24), but reappeared now. |
|
(Resolved) Issues with DAQ, posted by Björn Senfftleben on 30 Mar 2024, 00:17
|
We had some trouble with the DAQ. It was not able to start runs properly.
We got the following error messages:
initially: |
|
Shift summary, posted by Chan Kim on 29 Mar 2024, 22:38
|
X-ray delivery
- 12.72 keV, 10Hz, ~1.4 mJ/pulse, stable delivery
Optical laser delivery |
|
Issue, posted by Chan Kim on 28 Mar 2024, 14:56
|
| Pulse energy fluctuation observed after full train operation in SA2 starts. |
|
Shift summary, posted by Chan Kim on 28 Mar 2024, 14:54
|
X-ray delivery
12.72 keV, 10 Hz, NOT stable delivery, pointing drastically changed in the afternoon, presumably due to the train-on-demand operation
at SASE2
Optical laser delivery |
|
Shift summary, posted by Peter Zalden on 23 Mar 2024, 23:12
|
User experiment transient grating, Cris Svetina. (LTP)
Used 7.11 keV from ACC with very good performance, above 4 mJ.
Collected pump-probe data on user sample most of the time
today
FXE will operate in 24h mode for the rest of the delivery week
|
|
Shift summary, posted by Peter Zalden on 22 Mar 2024, 23:13
|
User experiment transient grating, Cris Svetina. (LTP)
Used 7.11 keV from ACC with very good performance, above 4 mJ.
Collected pump-probe data on user sample most of the time
today, only minor interruptions due to accelerator outages
After the outage at 21h, SASE came back with 17 eV lower photon energy, so we had |
|
Shift summary, posted by Raphael de Wijn on 22 Mar 2024, 06:35
|
X-ray delivery
- 9.3 keV, >3 mJ/pulse, beam down around 30min
Optical laser delivery |
|
Shift summary, posted by Peter Zalden on 21 Mar 2024, 23:20
|
User experiment transient grating, Cris Svetina. (LTP)
Used 7.12 keV from ACC with very good performance, above 4 mJ.
Collected pump-probe data on user sample
Sudden
timing jump of around 20 ps. Could not find out why this happened some time between 9h today and 18h.
Needed to add camera to DAQ. Solved this |
|
Shift summary, posted by Raphael de Wijn on 21 Mar 2024, 06:33
|
X-ray delivery
- 9.3 keV, >3 mJ/pulse, stable delivery
Optical laser delivery |
|
Shift summary, posted by Peter Zalden on 20 Mar 2024, 23:15
|
Preparation for user experiment transient grating, Cris Svetina
Used 7.12 keV from ACC with very good performance, above 4 mJ
Got spatiotemporal overlap with transient gratings using monochromatic
beam
One issue solved by DOC: Picomotors could not be scanned in karabacon, even though this worked well two/three weeks ago
|
|
Shift summary, posted by Giuseppe Mercurio on 20 Mar 2024, 23:03
|
Late shift summary
coarse timing
installed laser shutter on the laser
breadboard and I0 diode
exchanged camera of microscope to improve resolution
knife edge scans of FEL after BOZ
realized
that knife edge scans of OL cannot be done with present setup because OL cannot reach the diode in DIAG
Nahid prepared FeByP 1 liter, 30 mM
preparation |
|
Issue, posted by Frederik Wolff-Fabris on 20 Mar 2024, 12:41
|
BKR called PRC around 06:10AM to inform on vacuum issues at SA1 beamline leading to a lost beam permission for the North Branch.
VAC-OCD found an ion pump in the PBLM / XTD9 XGM presented a spike in pressure that triggered valves in the section to close.
After reopening valves the beam permission was restored; further investigations and monitoring in coming days will continue. Currently all systems |
|
Issue, posted by Harald Sinn on 16 Mar 2024, 12:12
|
11:15 SASE1/SPB called that they observed and issue with the SASE1 XGM/XTD2: about every 35 seconds the power reading jumps from 4 Watts to zero and
back. It seems to be related to some automated re-scaling of the Keithlyes, which coincides. The fast signal and downstream XGMs do not show this behavior.
The concern is that this may affect the the data collection later today. |
|
Shift summary, posted by Chan Kim on 15 Mar 2024, 23:43
|
**X-ray delivery**
- 6 keV, 3.2 mJ/pulse, stable delivery
**Optical laser delivery** |
|
Stability Issue, posted by Tommaso Mazza on 15 Mar 2024, 18:02
|
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. |
|
Issue, posted by Romain Letrun on 15 Mar 2024, 07:08
|
There are now two watchdogs for the XTD2 attenuator running at the same time
SA1_XTD2_WATCHDOG/MDL/ATT1_MONITOR020
SA1_XTD2_OPTICS_PROTECTION/MDL/ATT1
that are configured differently,
which results in different pulse limits (see attachment). |
|
Shift summary, posted by Chan Kim on 15 Mar 2024, 00:16
|
X-ray delivery
6 keV, 2.4 mJ/pulse, stable delivery
Optical laser delivery |
|
Issue, posted by Harald Sinn on 15 Mar 2024, 00:07
|
SASE1 bunch number was reduced to 10 pulses for no obvious reason.
Traced it back to a malfunctioning of the watchdog for the solid attenuator (see attached error message)
Deacttivated the watchdog for SASE1 solid attenuator. Re-activated it again. |
|
Shift summary, posted by Chan Kim on 13 Mar 2024, 23:41
|
X-ray delivery
6 keV, 2.6 mJ/pulse, stable delivery
Optical laser delivery
800nm PP laser, stable delivery
Achievements/Observations |
|
Status, posted by Romain Letrun on 13 Mar 2024, 10:09 7x
|
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 |
|
Shift summary, posted by Marcin Sikorski on 05 Mar 2024, 07:41
|
10 keV beam
Detector: JUNGFRAU in the burst mode (16 memory cells)
Achievements:
multiple sfx data sets (lysozyme)
with 4 and 8 pulses (at 1.1MHz) per exposure taken
|
|
Issue, posted by Romain Letrun on 04 Mar 2024, 09:42
|
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. |
|
Shift summary, posted by Raphael de Wijn on 04 Mar 2024, 06:52
|
X-ray delivery
10 keV, up to 128 pulses with custom bunch pattern, 1.6-2.0 mJ
Optical laser delivery
NA
Achievements/Observations |
|
Status, posted by Naresh Kujala on 01 Mar 2024, 17:11
|
-Machine status
the cold compressor failure occurred at ~16.30hr today. And it will take around 35 hr to fix it. I will update via email (local contacts for
experiments) and Operation Elog tomorrow with more details. |
|
Shift summary, posted by Romain Letrun on 01 Mar 2024, 10:54
|
X-ray delivery
10 keV, up to 128 pulses with custom bunch pattern, 1.6-2.0 mJ
Optical laser delivery
NA
Achievements/Observations |
|
Shift summary, posted by Jörg Hallmann on 01 Mar 2024, 06:30
|
Shift summary (Feb 29th):
Stable seeding with 1mJ + 400mJ SASE
Alignment of Split and Delay Line |
|
Shift summary, posted by Romain Letrun on 29 Feb 2024, 10:04
|
X-ray delivery
10 keV, up to 160 pulses at 1.1MHz, 1.8 mJ
Optical laser
delivery |
|
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 |
|
Shift summary, posted by Giuseppe Mercurio on 11 Feb 2024, 06:28
|
Night shift summary
Andreas, Giuseppe
we finished to measure sample 17 and 41 in CARD 06_Y2018F04
we transferred sample Card_07_Y2018F19
we started measuring |
|
Shift summary, posted by Tokushi Sato on 10 Feb 2024, 23:32
|
X-ray delivery
1-350 at 12.45 keV, 1750 uJ. Stable delivery
Optical laser delivery
None
Achievements/Observations |
|
Shift summary, posted by Tokushi Sato on 10 Feb 2024, 00:12
|
X-ray delivery
1-350 at 12.45 keV, 1700 uJ. Stable delivery
Optical laser delivery
None
Achievements/Observations |
|
Shift summary, posted by Giuseppe Mercurio on 09 Feb 2024, 07:15
|
night shift summary
achievements:
characterized FEL beam size to have 20 um x 20 um (Hor x Ver)
exchanged sample
closed KB baffle, HSLITS, guardstage
started |
|
Shift summary, posted by Tokushi Sato on 08 Feb 2024, 23:14
|
X-ray delivery
1-350 at 12.45 keV, 1700 uJ. Stable delivery
Optical laser delivery
None
Achievements/Observations |
|
Shift summary, posted by Giuseppe Mercurio on 08 Feb 2024, 07:00
|
Late shift 07.02.24
Laurent, Martin
Continued with laser preparation |
|
Shift summary, posted by Giuseppe Mercurio on 06 Feb 2024, 07:17
|
|
|
Shift summary, posted by Jörg Hallmann on 05 Feb 2024, 23:10
|
check of the optimized focussing options at 10 keV using only one arm in CRL2 - results still to be evaluated
successful check of the mirror chamber in the experiment hutch of MID - it was possible to reflect the direct beam down and use it under a shallow
angle on the sample position |
|
Shift summary, posted by Wonhyuk Jo on 04 Feb 2024, 23:36
|
Goal Achieved.
- Finished flat field measurement for AGIPD at different scenarios for upcoming user experiments.
- Aligned the spectrometer at DES and obtained the energy spectrum of 9 keV SASE. |
|
Shift summary, posted by Jörg Hallmann on 03 Feb 2024, 23:51
|
goals achieved:
alignment of the beam in tunnel and hutches including refinement of the beam in the center of rotation
check of cameras and optical components |
|
Shift summary, posted by Romain Letrun on 02 Feb 2024, 23:31
|
X-ray delivery
1-64 pulses at 10 keV, ~1.1 mJ.
Overall stable delivery.
Optical laser delivery
NA
Achievements/Observations |
|
Shift summary, posted by Konopkova Zuzana on 02 Feb 2024, 12:40
|
beam parametes: 8.5-9 kev, 1.2 mJ, 1-2 pulses
HED trajectory established from XRO setpoint, shape and transmission optimized
monochromator aligned
5
sets of CRLs including nano-focus aligned
ZZ yesterday morning to fix cameras, connect motors..
DAQ rolled back to legacy version, |
|
Shift summary, posted by Romain Letrun on 02 Feb 2024, 00:04
|
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 |
|
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 Natalia Gerasimova on 01 Feb 2024, 07:14
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Moning shift summary (31.01 and 01.02)
Acievements:
- SRA recalibrated, cross position on FEL imager found |
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Shift summary, posted by Chan Kim on 31 Jan 2024, 23:26
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31.01.2024 (Day shift)
X-ray delivery
10 keV
1200 - 400 uJ (significant pulse energy slope within train)
Optical laser delivery |
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SA1 status, posted by Frederik Wolff-Fabris on 31 Jan 2024, 11:24
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A ZZ is taking place today, 31.01 at 11:30, in XTD9 to verify and fix the M3 Pop-in screen which is currently blocking the beam. It is not
yet clear if this is an electrical or mechnical problem.
** Update 13:05: ZZ intervention is finished and successful. A mechanical issue due to a loose coupling between motor and spindle was fixed. |
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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 Jan Gruenert on 28 Jan 2024, 13:50
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RC / BKR informs : Beam is down (since 12h10), all beamlines affected
The reason is failure of a quadrupole (power supply) downstream of the dogleg.
The MPS crew is working on recovery, access to XTL ongoing. |
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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 |