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
- Aligned NKB trajectory
- Achieved NKB focus
- Reduced background scattering on AGIPD
- Started data collection
Issues
- Identified a couple of problems with the new DAQ that we were testing. Controls group informed and investigating
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Shift summary, posted by Tokushi Sato on 21 Feb 2024, 23:00
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X-ray delivery: stable and flat over 250 pulses per train. 1.1 MHz with 400 uJ
Optical laser delivery: NA
Achievements/Observations:
- Beam optimization and characterization
- Short pulses tuned
- HIREX setup and used to characterize the number of SASE SPIKES per pulse (~10)
Issues
- 10 SASE spikes per pulse is more than desired
- discussion with BKR and AccRC regarding possibilities for optimization (feedback in the morning)
-HIREX data proc is not correct as dark processing fails
- DOC informed and working on it
- one issue was gothard II appeard to have timed out - does the number of triggers need increasing?
-sample jetting setup
- electrospray working but saw exactly 1 hit in run 32
- tried to alighn with silver nano-cubes but had to switch to sucrose to increase hit rate to aid alignment
- no hits with sucrose seen with scanning X +- 1mm
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Shift summary, posted by Peter Zalden on 22 Feb 2024, 06:13
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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:
- Cr foil scan for energy calibration of the FXE mono
- Prepared setpoints for XAS scans during next week's user expts. at: Ce L3 (5.72 keV), Ce L2 (6.16 keV) and Mn K (6.54 keV)
- IPM calibration against XGMD
Issues:
- ATT MDL (class JJAttenuator) got stuck in INIT state and then did not show that absorber was inserted in the beam path (ticket to be submitted to Ctrls)
- DA3 of FXE DAQ (FXE_DAQ_DATA/DA/3) got stuck in changing state (it got too many parameters inserted). The restart by shutting down the server and waiting for the device to come back up took around 20 mins, see 22.2.2024, 4:24 am to 4:43 am.
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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:
- Beam optimization and characterization
- Short pulses tuned and number of spikes reduced
- X-ray focus FWHM calculation found to have a bug in pixel size used
- rest to 0.2 FWHM of focused beam now better than 1.5 microns
- Laser illumination installed to enable particle visualization to aid alignment and feedback
- Sample injection and data collection for several hours
- Hits seen from Silver cubes
- very low hit rate from copper
- cubes, and spheres
Issues:
- DAQ - multiple crashes and restarts needed throughout the shift
- Proc pipeline - some runs fail to processwhile adjacent runs collected with same conditions (run repeater) process without errors
- Sample injection - copper samples continue to be difficult to inject
- very low hit rates (few hits seen per run)
- clogging issues
- Focus drift - focus was tuned at around 3 pm, by 9 when we could check again focus was >3 microns FWHM
- Beam intensity reduced during the shift and BKR needed to tune it back
- returned intensity to 200 uJ - they asked if we wanted to continue but did not as this could have resulted in more SASE spikes
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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:
NA
Achievements/Observations:
Beam optimization and characterization
Sample injection and data collection for ~10 hours
reasonable hit rates observed but highly fluctuating, making alignment optimisation slow
Issues:
DAQ - restarts needed throughout the shift
Sample injection - copper samples dont give high hit rate and increaseing sample concentration led to clogging
Focus drift - focus was tuned at around 3:30 pm ( from 4 um back to 1.5 um)
-again at 19:30 when we checked again focus was >2microns FWHM returned to 1.5 |
Shift summary, posted by Motoaki Nakatsutsumi on 24 Feb 2024, 11:58
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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.
Progress is in general good. Most of planned tasks for the day are done.
We called BKR whether we can get a bit more energy/pulse this morning, but it appears difficult. Otherwise, having a bit more energy would be helpful to have enough signal-to-noise ratio for X-ray imaging.
Achievements:
- Insert nanofocus lens, pump IC1 sample chamber into vacuum
- Establish X-ray axis, measure source point and divergence
- Set up the CRL scheme overfilling CRL4b nanofocus (the settings used in Feb at 8.2 keV were CRL1 arm 3,5 and CRL2 arm 1)
- Bring the imaging systems to the X-ray axis
- Focus and calibrate the x-ray spectrometers
- Laser-xray timing verified on YAG
- DAMNIT setup
- Nanofocus imaging optimization (Z-scans) with Cu 25um wire and Siemens star
- Best focus was identified
- Sample alignment
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Shift summary, posted by Johan Bielecki on 25 Feb 2024, 00:11
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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
ns laser for particles visualization
Achievements/Observations
- Beam optimization and characterization
- X-ray focus FWHM calculation found to have a bug in pixel size used
- Sample injection and data collection for >10 hours
- collected data on copper cubes with average hit rates of ~5%
Issues
- DAQ - multiple crashes and restarts needed throughout the shift; at certain point we encountered three crashes within less than an hour; and called DAQ to intervene
- Gotthard II at Hirex stopped acquiring and we had to change the number of the acquisition time to ~10 days to allow continuous running until the end of the beamtime.
- hit rates were low and sonication of samples needed to be done several time to prevent clogging issues
- Focus drift - we observed significant drift in the beam; a refocus then had to be check several times to focus back the beam to nm
- beam intensity fluctuated a lot during the shift
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Shift summary, posted by Motoaki Nakatsutsumi on 25 Feb 2024, 14:47
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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.
The x-ray intensity and pointing stability have been excellent, resulting in a substantial amount of data being acquired by users just two days into the beamtime. Users have expressed satisfaction with the performance thus far.
There were a couple of brief beam downtimes, but they had minimal impact on beamline operations.
Achievements:
- Successful laser delay scan (0 - 1000 ps) of wire compression dynamics under ultra-intense laser interaction (>10^21 W.cm-2).
- Nanofocus Z scan imaging completed.
- Online analysis tools (DAMNIT) are functioning properly.
- Some minor issues with the automatic shot procedure using MDL were encountered but mostly resolved.
- Ongoing issues persist with the off-axis-parabola mirror X axis (motor movement not stopping), which will require follow-up after the beamtime.
- A minor issue was identified with laser timing jumps, possibly stemming from a trainID distribution issue with the ToD system. Increasing the sequence delay of the master timer from 10 to 30 appears to have mitigated this problem.
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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
- Sample injection and data collection for ~11 hours
- collected data on copper cubes with better hit rates than previous shifts; ~15%
Issues
- We had laser interlock issues, the magnet in door went to error state and this was fixed by Klaus Witt call around 22:15.
- data migration issues; it was very slow and DOC did not figure out the cause for this.
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Shift summary, posted by Motoaki Nakatsutsumi on 26 Feb 2024, 14:32
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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 photon energy slightly (600 uJ as we had yesterday) would further improve the signal-to-noise ratio.
Key Achievements and Current Challenges:
- Ongoing data accumulation.
- Issue with the sample motor (stepper motor). The encoder ceases to update values although the motor is actually moving. While a temporary workaround has been implemented, a thorough investigation is needed post-beamtime. More details: [Link]
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Shift summary, posted by Jörg Hallmann on 29 Feb 2024, 02:41
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Stable seeding with 1mJ + 400mJ SASE
HIREX triggered interlock when all attenuators are removed
successful test of nano focusing setup
successful test and alignment of x-ray microscopes
Alignment of split and delay line
Laser x-ray timing at sample position |
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
Achievements/Observations
- Instrument aligned up to IRDa at 10 keV.
- Focus optimised.
- JUNGFRAU timed.
Issues
- We could only start using the beam at 1 am.
- More mirror movement needed to get the beam down the instrument than expected.
- Several AGIPD power cycling needed due to issues with MFPGA2
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Shift summary, posted by Jörg Hallmann on 01 Mar 2024, 06:30
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Shift summary (Feb 29th):
Stable seeding with 1mJ + 400mJ SASE
Alignment of Split and Delay Line
successful test of nano focusing setup together wir SDL lower branch
optimisation of x-ray microscope
timing with SDL was at first attempt not successful: we found some clipping of the beam with the DPS and the Diamond window
first test of laser irradiation on a sample to test the pump conditions for the user experiment
-> found time0 at the end at 1100ps.
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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
Achievements/Observations
- Collected first SFX data, but background on JUNGFRAU is rather high and needs further optimisation.
Issues
- AGIPD having frequent problems with both MFPGAs (once even both at the same time). Frequent restarts were needed.
- Horizontal drift of the beam pointing.
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Shift summary, posted by Raphael de Wijn on 04 Mar 2024, 06:52
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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
Achievements/Observations
- collected SFX data with 8 pulses per memory cell with our Jungfrau 4M. Data processing needed to evaluate quality.
Issues
- AGIPD having frequent probles with MFPGA's (both and once even both at the same time). Frequent restarts were needed.
- Jf4M chiller had hard time to reach/keep the setpoint
- downstream CRL arm #9 removed (produced trippel beam on EHD)
- difficulties to minimize bgdd
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Shift summary, posted by Marcin Sikorski on 05 Mar 2024, 07:41
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- 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
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Shift summary, posted by Chan Kim on 13 Mar 2024, 23:41
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X-ray delivery
- 6 keV, 2.6 mJ/pulse, stable delivery
Optical laser delivery
- 800nm PP laser, stable delivery
Achievements/Observations
- NKB focus optimized and PSLITS optimized
- Beam going through IBS camera
- PP laser rough timing checked w.r.t. X-ray
- Catcher and injector motors (X, Z) are aligned well with about 1.5mm offset in X
Issues
- Manifold-MDL issue (reported in Issues tap)
- SPB_IRU_LIQUIDJET/CAM/1 (IRU nozzle insertion camera) is not working. Power cycle required.
- SPB_EHU_Valve closed 2-3 times due to vacuum interlock
- Space (KF50 pipes) in the super-structure was too long for the user injector (nozzle rod). After taking off small spacer, nozzle is very close to the injector valve during insertion. Please check it out whether we can find any better solution or not.
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Shift summary, posted by Chan Kim on 15 Mar 2024, 00:16
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X-ray delivery
6 keV, 2.4 mJ/pulse, stable delivery
Optical laser delivery
800nm PP laser, stable delivery
Achievements/Observations
NKB focus cslits optimized
Some progress with AGIPD background although we still need to improve
Catcher and injector motors (X, Z) are aligned well; with defroster, had under 5mm offset in X
Managed to get a jet and overlap with X-rays.
Issues
Beckhoff flowmeters were disconnected and we were not sure which ports to connect, maybe spent 45min to connect to the right ports and restart device.
Helium flow meter was on but not updating, had to restart it too.
Marco noted actual measured flow at beckhoff VS HPLC set flow was perhaps too low, not sure
Vacuum with injector improved, issue was related to nozzle preparation, however even after this fix the chamber pressure was just over the AGIPD interlock. After tuning gas/liquid flow managed to go under it, but possibly this can also be improved.
Often number of pulses was being changed without us requesting it.
One AGIPD module stopped working after moving quadrant.
DAQ data aggregator crashed a few times, Steffan Hauf will look into this issue after we finished the shift.
Could not move one of the AGIPD quadrant (Q4) due to interlock
Background in Q1 and Q3 needs to be optimized, and/or quadrants needs to be moved.
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Shift summary, posted by Chan Kim on 15 Mar 2024, 23:43
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**X-ray delivery**
- 6 keV, 3.2 mJ/pulse, stable delivery
**Optical laser delivery**
- 800nm PP laser for jet illumination, stable delivery
**Achievements/Observations**
- NKB focus checked and IUT_Slits optimized
- AGIPD quadrants position finalized
- Measured a lot of water BG runs and few runs with Au nanoparticles (sphere with ~50 nm in diameter)
**Issues**
- SideMic data not saved properly (empty array).
- Found relatively high BG when nozzle is IN since the distance in between nozzle tip & the interaction region is ~100um (even 80 um in some cases).
- DA issue (DAQ was stuck in changing) although all the DA looked healthy. DOC fixed the issue (temporarly) together with Egor, Florian, and Steffen.
- Runs callibration were not working |
Shift summary, posted by Giuseppe Mercurio on 20 Mar 2024, 23:03
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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 of liquid jet for the night
problems:
*BOZ online analysis not yet working (in progress)
*OL cannot reach diode in CHEM_DIAG
*one lasermet shutter in ILH is not operational, we use the one meant for the XOX branch
*new ADC karabo device stops frequently, so we went back to the normal FADC2 device to be able to do knife edge scans. The scenes are linked to the main CHEM scene.
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