X-ray delivery

• 9.3 keV, 120 pulses
• Good Beam Stability -~1mJ

Achievements/Observations

• Double Slit and V-Pattern Interference Measurements
• Nearfield Ptycho-Scans
• Nano-KB (@Richard)

Issues

• Office network webcams extremely slow in control room
• X-ray delivery jddd display computer frozen again (related to ubuntu update?)

Instrument status

• AGIPD HV off.
• AGIPD gate valve closed and pinned.
• Attenuators set to thickest diamond.
• Vacuum valves closed.
• YAG in-beam in interaction region.

To do for next shift

• End of beamtime - Nearfield ptychography experiment not completed, may require time during the week
• NanoKB partially aligned  - see dedicated post

SPB/SFX User shift 1 3333

X-ray delivery

• 9.3 keV, 1.7 mJ, 202 pulses @ 564 kHz

Achievements/Observations

• Silicon wafer post sample attenuator (240um, ~10% transmssion @ 9.3 keV) was mounted in-front of the AGIPD detector. elog: 3

• Beamline is aligned for the NKB trajectory and the x-ray focus size of 300 nm being achieved. elog: 4

• Copper flat field including 240 um silicon wafer attenuator. elog : 7

• Lysozyme and Photosystem-II data (@ 41 mm AGIPD Z motor value) elog: 5

• Fixed medium gain used initially, later switched to adaptive gain to allow high gain for peaks behind Si attenuator mask. Switch of both calibration pipelines..

• data at full transmission. Move to medium gain for water ring outside Si attenuator

• Several blocked nozzles, at least potentially caused by never filtered sample.

Issues

• Problems with post calibration analysis, observing 'disk quota error' - SPB/SFX RC to investigate with instrument data team and DRC

• problems with data calibration - SPB/SFX RC to investigate with instrument data team and DRC

Instrument status

• AGIPD off and warm

• AGIPD gate valve OPEN and pinned.

• Attenuators set to thickest diamond.

• Vacuum valves closed.

• He valve closed.

• Sample valves cleaned.

• ns laser off.

• Sample chamber and AGIPD turbos OFF, rough pumping ON

To do for next shift

• remove Si post-sample attenuator

• continue with user program (small crystals DFFN etc. see elog)

SPB/SFX PCS user proposals (day 1)

X-ray delivery

• 9.3 keV, 1600 uJ/ pulse

Achievements/Observations

• PCS user time (day 1) completed. Several runs from different user groups with visible diffraction patterns, likely not sufficient for full datasets
• Additonal data for nozzle alignment sub-project (Lysozyme)

Issues

• ONDA setup a little fiddly (default data stream name not correct?)

Instrument status

• AGIPD HV off.
• AGIPD gate valve closed and pinned.
• Attenuators set to thickest diamond.
• Vacuum valves closed.
• Sample chamber turbos off
• Laser lamp off

To do for next shift

• clean catcher (watch out for guidance on user sample handling)
• align laser for in-house work
• remaining PCS project if viable

SPB/SFX In-house research 4978 

X-ray delivery

• 9.3 keV 202 pulses / train, relatively stable intensity 1.9 mJ / pulse, some decrease in intensity across train

Optical laser delivery

• PP laser 1030nm 3rd harmonic (343nm) @ 282 kHz, 101 pulses / train

Achievements/Observations

• PP laser timing for 100nm time point
• PP laser / x-ray overlap with buffer + caged compound
• de-oxy Myoglobin + caged compound data with and without PP laser activation of caged compund

Issues

• suspicion of leaking plunger in the last reservoir of the evening

Instrument status

• Shutters closed
• XTD9 atteunators @ thick CVD diamonds

SPB/SFX In-house research 4978 shift 2

X-ray delivery

• 9.3 keV 202 pulses / train, relatively stable intensity 2.0 mJ / pulse at start of train, ~30% decrease in intensity across train
• BKR made an attempt to inprove slope around 18:00, small improvement but degraded again over time
• One short interruption

Optical laser delivery

• PP laser 1030nm 3rd harmonic (343nm) @ 282 kHz, 101 pulses / train

Achievements/Observations

• PP laser timing for 10nm time point
• PP laser / x-ray overlap with buffer + caged compound
• de-oxy Myoglobin + caged compound data with and without PP laser activation of caged compound

Issues

• several nozzle changes requried throughout the day
• significant sample debris on windows from nozzle 'events' requried mid-run shroud and window clean

Instrument status

• AGIPD HV off
• Shutters closed
• in-line vacuum valves closed.

To do for next shift

• shroud / catcher clean needed
• alignment etc.
• in-line crystallisation project

Dear all,

please find here a summary of the status on this critical topic provided yesterday evening (around 19:15) by Zunaira Ansari (extract from her e-mail).

"Dear colleagues,

Thank you very much for your cooperation. SEPS interlock tests are completed in all SASEs except SASE3. AIBS interlock tests are complete in all hutches.

SASE3 SEPS interlock will be tested on Monday the 30th of January strating from 9a.m.

I kindly request the use of the SQS control hutch for the testing.

All SASE3 hutches will be interlocked on Monday morning.

@Maurizio and Bernard/ Nerea: Could you please be present during the testing? IIt will be much appreciated.

I would very much like to thank Eric, Nerea and especially Bernard for helping with the interlock tests today.

Best regards,

Zunaira

Dear all,

last evening Suren Karabekyan and myself did a short notice ZZ access to XTD1. The reason is that machine operators detected the lack of response on the Cell 17 Phase Shifter. The intervention was successful and around 20:30 we left the tunnel.

Regards,

R.

Dear all,

After the incidences reported yesterday and the diagnostic remotely done (where we could narrow down the root cause to the edge-welded below at the Linear stage of the arm Nr. 6 - 2.4 mm CVD diamond], we confirmed this as a fact during the schedule access today. Here is a succint summary of what happened.

1. Although planned for 9:00, we could only enter the tunnel past 10:15 due to some issues for the accurate release of the XTD1 tunnel interlock, in such way that the use of the XHE2 elevator could be used.
2. The first action was confirming the first hypothesis. The result of a direct He-leak test shown a leak rate up to 5*10-6 mbar*l/s, which was consistent with the observation from yesterday. No other leak was found.
3. After securing the vacuum integrity of the lateral sections, venting the long sector took some time.
4. We also had some issues with the vacuum connections of the affected actuator, but eventually it could be eventually removed.
5. A first evaluation of the 2.4 mm CVD diamond, no major damage is evident and the chances of reusing are high (at least at first sight).
6. Also, the repair of the leaky part (or better said, its eventual replacement) seems feasible, and would only depend on finding a similar bellow equipment. XRO is working already on this.
7. The vacuum system could be recover relatively fast to an extent where a general leak test could be performed again. No further leaks were found.
8. After the removal of the arm 6, and the reconfiguration of the pneumatic system, we tested several time (in air and in vacuum conditions) that not having the arm 6 wouldn´t block the use of the solid attenuator. Also XRO check/is checking all the possible implications for the "normal" operation of the beamline.
9. At 13:30 we communicated with BKR and later with the PRC to provide feedback on the progress.
10. At 14:15 we confirmed that we were leaving already the tunnel, so the tunnel search could be triggered.
11. Around 14:30, the SA2 vacuum OK signal was released and confirmed by BKR operators.
12. In conclusion, the time envelope  of effective work (4h) was achieved.

At this moment, the sector vacuum level is recovering positively and the average pressure is in the 5*10-8 mbar after 2,5 hours of pumping the the ion pumps, which is a good indication of the overall success.

With best regards,

R. Villanueva & B. Dickert.

Dear all,

the closing report on this issue can be found in the following Alfresco link:

https://docs.xfel.eu/share/s/GzxORQOGToe_tiug7LIHhQ 

Regards,

R.

Here is a capture of the observed issue with the SPB shutter the past night.

Observe the two opening/closing incidents: the first kept the shutter "OPEN" signal during 4 minutes aprox., and the second did the same for about 30 seconds.

Not clear the origin of these actions/changes on the status of the signals.

SPB/SFX In-house research 4978 shift 3 - end

X-ray delivery

• 9.3 keV 352 pulses / train, relatively stable intensity ~1.9 mJ / pulse
• beam down ~30 min

Optical laser delivery

• None

Achievements/Observations

• Collected several runs for the in-line crystallisation project but some difficulties to inject, probably a coating issue
• Saw a lot of crystals

Issues

• Realised that there seems to be a vacuum leak from the load lock valve. Optimal pressure is only achieved when the load lock pump is running.

X-ray delivery

• 7 keV, 202 pulses, 564 kHz, ~1.3 mJ, stable delivery

Optical laser delivery

• None

Achievements/Observations

• Collected a few NQO1 runs (no mixing) in Adaptive and FixedMG with the Ros setup, good diffraction
• Difficult to reach droplet synchronisation

X-ray delivery

• 7 keV 202 pulses 1.6mJ stabel across train and throughout the shift
• Beam down at 7am again, power glitch same as yesterday

Achievements/Observations

• faster changover and alignment
• YAG on nozzle worked
• collected data the droplets in oil sample delivery method - many good hits observed
• still working on the synchronisation with the x-ray pulses

X-ray delivery

• 13.6 keV, ~1.6 mJ and up to 202 pulses at 0.5 MHz

Optical laser delivery

• PP laser, stable delivery

Achievements/Observations

• User sample delivery tested
• M1 and M2 aligned
• x-ray beam aligned and focused
• PP laser spatial and temporal alignment done
• AGIPD background reduction to be optimized: still one photon diffuse scattering and ten photons scattering on the top right quadrant

X-ray delivery

• 13.6 keV, ~1.8 mJ and up to 352 pulses at 1.1 MHz

Optical laser delivery

• PP laser, amphos laser computer in error for ~2h

Achievements/Observations

• x-ray beam aligned and focused
• PP laser optimization done
• AGIPD background reduced to 1-2 photons diffuse scattering

Issues

• Beam down ~2h
• PP laser down for ~2h
• AGIPD tripped due to pressure spike, currently all off

X-ray delivery

• 13.6 keV, ~1.6 mJ and up to 352 pulses at 1.1 MHz.
• Beam down until around 1PM.
• After agreement with FXE, we could collect data until midnight.

Optical laser delivery

• 800 nm, 50 fs, 1 to 176 pulses at 564 kHz pumping TOPAS at 475 nm.
• PP laser down for ~4h. Facility cooling water for the AMPHOS chiller was down, solved by LAS and TS OCD (controller had to be replaced).

Achievements/Observations

• PP laser and X-ray spatial and timing overlap.
• Collected pump-probe data ~1.5h until PP laser down, then dark data on a different sample and then again ~1.5h pump-probe at the end of the shift

Issues

• Beam down in the morning.
• PP laser down in the evening.

X-ray delivery

• 13.6 keV, ~1.6 mJ and up to 352 pulses at 1.1 MHz.
• Beam down from 10:30 to 19:00.

Optical laser delivery

• 800 nm, 50 fs, 1 to 176 pulses at 564 kHz pumping TOPAS at 475 nm.
• Stable delivery.

Achievements/Observations

• PP laser and X-ray spatial and timing overlap.
• Collected data for ~7.5h.
• Very stable sample delivery.

X-ray delivery

• 7.8keV, ~2.5mj, no beam before 1:15am
• One undulator was not moving, expert was called

Optical laser delivery

• ns laser for particle imaging

Achievements/Observations

• RGA used for quantitative gas BG analysis
• Collected more data from 55 nm Ag cube
• Collected some sucrose data
• Collected gold bipyramids data

Issues

• Could not get sucrose droplets delivered to the interation point while injecting He at the bottom of the skimmer. As soon as it was enough He to decrease N, droplets desappeared.
• Still some questionmarks regarding the gas flows through the skimmer section into the chamber. More tests in the lab necessary.

X-ray delivery

• 16.9 keV, up to 30 pulses and 1.1 MHz for alignment, 1 pulse for data collection
• 700-800 uJ
• stable delivery

Optical laser delivery

• None

Achievements/Observations

• More data collection with Jungfrau at the back of the CSS
• Crystal diffraction data from salicylic acid, ibuprofen and MOF collected with detector close up

Issues

• Clear aberations from our CRLs, so we operate with as few as possible
• Twice during data collection we lost connection to JF4M module 01 requiering reset of receivers.

FXE bring-up, summary of shifts 31.1. and 1.2.:

Beam delivery (11.5 GeV)

• 9.3 keV, 1.5 mJ (31.1.)
• 7.1 keV, 1.7 mJ (1.2.)
• Horizontal beam jitter 200 µm (RMS), a bit more than usual

Tunnel alignment

• Align X-ray trajectory according to "fixed source" protocol with fixed TX of M3 in XTD9
• References saved for two offset configurations
• Beam transport diagnostics data taken to estimate source of jitter

Instrument Alignment Performed

• After WMP, calibrate slits, lenses and attenuators to the beam trajectory
• Check CRL performance after swap to new batch
• Prepare beam focus for next user expt at 9.3 and 7.1 keV
• Re-aligned FXE mono1 after 1st xtal swap

Issues

• Camera FXE_XTD9_MONO-1 BEAMVIEW could not be instantiated: Solved by DOC (suggested restarting the KaraboGUI)
• Issue with heater control on FXE mono: When switching ON in LOCAL mode it will apply max power; need to be in REMOTE first to control power via karabo
• FXE_XTD9_MONO-1/MDL/PITCH could not be instantiated: Solved by DOC (default config was wrong)
• SA1 DAQ PBM: DA01 in unknown state: Solved by DOC (IP misconfig.)