X-ray delivery

• 10.65 keV, 128 pulses at 1.13 MHz, 1.6-1.7 mJ.
• Overall stable delivery.

Optical laser delivery

• 800 nm, 50 fs, 226 pulses at 1.13 MHz.

Achievements/Observations

• Continued characterisation of crystals (thermal measurement, interferometry, imaging) under different beam conditions ranging from direct to focused beam.
• Spectral measurement in parallel to crystals characterisation.
• Imaging of static samples with Zyla and Shimadzu.

Issues

• We were not able to complete the last part of our programme since we were not allowed to change the number of bunches and repetition rate. Measurement ended at 21:00 and last two hours fo the shift were spent in discussion with SQS/BKR/RC/PRC with no positive outcome.

X-ray delivery

• 10.65 keV, up to 339 pulses at 1.13 MHz, 1.6-1.8 mJ.
• 12.4 keV, up to 30 pulses at 1.13 MHz, 1.0-1.2 mJ.
• Beam not aligned to the crosshair at 12.4 keV, but we could work with it as it is to avoid further tuning.
• Overall stable delivery.

Optical laser delivery

• NA

Achievements/Observations

• Thermal measurements with Be and Al CRLs under various conditions.
• Performed test with SQS to determine the effect changing number of SASE1 bunches. Upon changing from 339 to 30 bunches at 1.13 MHz, the pump-probe signal in SQS decreased by ~30% and partially recovered within a few minutes, but was at not point lost. Clearly, the decision made yesterday that prevented us to use the beam over the last two hours of the shift and to complete our programme was not based on solid evidence.
• Setup and alignment of IRDa in preparation for next week.

Issues

• Photon energy was changed from 12.4 to 12.0 keV shortly after 23:00 while we were still using the beam.

X-ray delivery

• 12.2-12.45 keV, up to 339 pulses at 1.13 MHz, 0.8-1.2 mJ.
• Couple of minutes beam interruption.

Optical laser delivery

• NA

Achievements/Observations

• Calibration of XPD's CAL/LPM at 12.4 keV.
• Measurement of CRLs transmission with LPM.
• Realignment of CRL chamber and all arms.
• Realignment of IRDa components and focus optimisation. Optimal focus with 17 lenses at 12.38 keV.
• Installation of remaining IRDa components: side microscope and flight tube.
• References taken in both IRDa's microscopes for laser setup next week.

Issues

• None.

Staff: DZ, AR, MK

X-ray delivery

• 12.42 keV 169 pulses for alignment 16 pulses for data collection. stable delivery excluding the extended interuption

Optical laser delivery

• none

Achievements/Observations

• Continuation of lysozyme experiment with parameters from yesterday
• data collection time limited by machine downtime, alignment optimisaiton and cleaning of the sample buildup around the interaciton region.

X-ray delivery

• 12.42 keV, 0.8 mJ/pulse, stable delivery

Optical laser delivery

• none

Achievements/Observations

• BG optimized (1-2 photons)
• Realignment of offset mirrors (M1 & M2), cube, straw, sidemic
• Jungfrau4M timing checked and optimized for single memory cell operation
• About 2 hours data collection

Issues

• Low pulse energy (Tomorrow, BKR and we should optimize the pulse energy)
• Extremely slow data calibration (it took more than 1 hour for 10 minutes run)

X-ray delivery

• 12.42 keV, 0.65 mJ/pulse, low pulse energy but mostly stable delivery

Optical laser delivery

• none

Achievements/Observations

• Unit photon flux increased by bending M2 bender more although incident pulse energy was about 0.65 mJ/pulse (10-20% lower then yesterday)
• Long data collection (4.5 hours) although we had rather low hit rate
• SideMic position and focus optimized in the end of the shift

Issues

• Even lower pulse energy (M2 bender helped a bit), any improvement will be helpful for Sun. night shift

X-ray delivery

• 12.42 keV, stable delivery with slightly less than 1.0 mJ/pulse (~0.95 mJ/pulse)

Optical laser delivery

• none

Achievements/Observations

• BKR semi-optimized photon flux by ~20% more then yesterday)
• Long data collection (5 hours) although we still had rather low hit rate with ligand (hit rate was higher without ligand)

Issues

• Beam pointing issue (only relavent to SPB_EHC_CRL) after BKR semi-optimize photon flux
• Rather low hit rate due to flux, crystal size, ligand, etc.

X-ray delivery

• 12.42 keV, stable delivery in single pulse mode with 1.9 mJ/pulse

Optical laser delivery

• 532 nm ns-laser for sample pumping

Achievements/Observations

• Collected protein crystal diffraction for three different samples with varying laser delay and fluence. LCP viscous jet sample delivery.
• Stable CRL focus using tunnel collimation with 3 XTD2 lenses followed by 17 focusing lenses in SPB hutch. 2 um FWHM focus with <1um standard deviation in 'X' position.
  • 3 XTD2 lenses gives a round X-ray beam approx 1 mm in size, such that we are almost overfilling the CRL apertues in SPB.

Issues

• Some initial jetting issues, which have now been solved.

Beam is back at around 11:30 pm

We lost 1 hr 30 min of beam time.(it was promised to get back at around 10:00 am)

If we want to change the pulse number then we need to call BKR.

posting for 17th June

Staff: AR, AS, FK, HH, JB, KK, DZ, MK

X-ray delivery

• 12.4 keV, 1.4 mJ

Optical laser delivery

• 532 nm, ns-laser for sample pumping

Achievements/Observations

• Continued to collect data many hours of data collection

Issues

• coupling with SASE2 limited feedbacks to control slope across train, this led to dificulties in alignment and lost time to correct for poor visualisation of the beam.
• After discussion SASE2 kindly gave permission to BKR to corect the slope to facilitate our alignment
  • we also with the help of PRC arranged for the same arrangment for alignment for sunday

X-ray delivery

• 12.4 keV, up tp 352 pulses but the intensity drop across the train was too dramatic to use. reasonably stable delivery with 202 pulses.

Optical laser delivery

• none

Achievements/Observations

• reestablished direct beam trajectory and verified instrument alignment
• collected flat field calibration for AGIPD-1M for all high priority scenarios and some additional settings (see table copied in SPB commissioning or original AGIPD log)

X-ray delivery

• 9.3 keV, 1-202 pulses at 1.13 MHz, 1.9-2.1 mJ.
• Overall stable delivery.
• L-IBFB could not be activated due to missing missing transfer matrix elements. Missing parameters entered by the expert who happened to be on shift this morning.

Optical laser delivery

• 800 nm, 50 fs, 564 kHz. Overlall stable delivery.

Achievements/Observations

• Installation and alignment of fixed target sample.
• Coarse timing of PP laser.
• Found diffraction of sample.

Issues

• Retracted CRL positions in MDL SA1_XTD2_CRL/MDL/CRL are not up-to-date and do not drive the CRLs to the "out" switch.
• PP laser OXC synchronisation signal dropped out a couple of times. LbSync and LAS informed.

X-ray delivery

• 9.3 keV, ~ 2 mJ, stable delivery except for the intensity slope along the train (fixed later on)

Optical laser delivery

• ns laser for imaging

Achievements/Observations

• Aligned the instrument for MKB focus configuration
• Optimzed MKB focus and detector background
• PCS - Collected data for about 3-4 hours with different sample concentration and crystal sizes.

Issues

• Issue with intensity slope along the pulse train (fixed later in the day)
• Issue with MKB combined motion (DOC informed)

X-ray delivery

• 9.3 keV, up to 181 pulses at 564 kHz, ~1.8 mJ. Overall stable delivery.

Optical laser delivery

• 800 nm, 50 fs, 564 kHz, up to 185 pulses. Overall stable delivery.

Achievements/Observations

• Tested first implementation of new automatic jet alignment device.
• Setup of photon arrival time monitor.

Issues

• No analog output from SPB_MKB_MVE/ACTRL/AX_FINE. Solved by EEE via DOC.
• Issue with MKBs coordinated motions under investigation by CTRL via DOC. Nothing obviously wrong, investigation still ongoing.
• SPB_OHD_SCR/MOTOR/ZOOM and SPB_OHD_SCR/MOTOR/FOCUS not working. Some parameters lost during summer maintenance period. Fixed by DOC/EEE.
• SPB_IRU_INJMOV/MOTOR/Y regulargly going into error state.
• No access to key XFEL/DESY services (elog, Redmine, etc.) for a while.
• SPB optics hutch shutter opened during the night, around 2:10, when we were not present causing a beam delivery interruption of about 5 minutes in SASE1/3.

Shift summary for 10.8.2023

X-ray delivery

• 9.3 keV, up to 181 pulses at 564 kHz, 1.8 - 1.9 mJ

Optical laser delivery

• PP Laser, 800nm, 50 fs, up to 181 pulses @ 564 kHz and 91 pulses at 282 kHz, stable delivery

Achievements/Observations

• Increased MBK_PSLIT aperture to fully fill the mirror's aperture
• Issue with coordinated MKBs motion solved with the help of EEE and CTRL.
• PP laser was aligned to IRU
• Established temporal overlap between PP laser and X-rays
• Continuation of automatic jet alignment testing
• Measured pump-probe data at different delays and fluences

Issues

• Injector Y stage is moving down without giving sany move command, DOC was informed. PLC experts will contact morning shift crew to investigate further
• Astigmatism of PP laser beam prevents optimal focusing of the beam at the interaction point. LAS has been informed

Shift summary for 11.8.2023

X-ray delivery

• 9.3 keV, up to 181 pulses at 564 kHz, 1.8 - 1.9 mJ

Optical laser delivery

• PP Laser, 800nm, 50 fs, up to 181 pulses @ 564 kHz and 91 pulses at 282 kHz, stable delivery

Achievements/Observations

• Continued pump-probe data collection for different delays and fluences
• Continued jet automatic alignment testing
• First test of arrival time tuning with BKR

Issues

• Injector Y stage issue still persists. The reason behind the issue might be a faulty econder, the stage is now in open loop. EEE will check the issue on Monday in detail.

Potentially damaged 1.2 mm CVD in XTD2 attenuator. This feature was not present earlier in the week.

X-ray delivery

• 9.3 keV, up to 181 pulses at 564 kHz, 1.8 - 1.9 mJ

Optical laser delivery

• PP Laser, 800nm, 50 fs, up to 181 pulses @ 564 kHz and 91 pulses at 282 kHz, stable delivery

Achievements/Observations

• Installed and aligned fixed target for pump-probe measurement
• Measured t0 with fixed target at IRU, scan tool to measure t0 was also tested
• Optimized Bimuth fixed target sample for diffraction condition
• Recorded pump-probe data (30 min 1 hour)
• Spatial and temporal overlap of X-ray and PP laser at PAM

Issues

• Issue with homing smaract stages used in fixed target. Solved by exchanging the stages for now but need to be checked later.
• Difficulties in observing pump-probe signal in online data analysis although diffraction signal could be seen and optmized on the fluorescent paper on DN500 and AGIPD detector
  • Data collected for further offline analysis

X-ray delivery

• 9.3 keV, up to 181 pulses at 564 kHz, 8 - 1.3 mJ
• Issue with pulse energy stability along the pulse train in the morning but optimzed later on in the day

Optical laser delivery

• PP Laser, 800nm, 50 fs, up to 181 pulses @ from 10 Hz to564 kHz

Achievements/Observations

• Optimized Bismuth diffraciton condition on AGIPD
• Collected pump-probe data with Bismuth fixed target
• Aligned PAM and measured arrival time with electron bunch arrival time slope enabled
  • Positive slope and V shape slope measured

Issues

• Issues with beam stability and intenisty.
  • Optimized later on in the day
  • But did not recover what we had yesterday in terms of pulse energy

X-ray delivery

• 9.3 keV, up to 178 pulses at 564 kHz, 3.7  mJ, stable delivery
• Beam delivery was started from 19:00

Optical laser delivery

• PP Laser, 800nm, 50 fs, up to 90 pulses @ 282 kHz

Achievements/Observations

• Alignment was completed within 3 hours including T0
• Some data collection with fixed target

Issues

• XTD9 safety shutter was closed