- finalized the flatfields of the AGIPD at 0.5 MHz
- optimized the performance of the beam (now 850 - 950 uJ)
- measured flatfield and darks for the Jungfrau detector
- optimized the instrument alignment of FEL beam and ALAS to the center of rotation
 

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.

alignment checks of the CRL2 device as well as the Mono - continuation of both devices together planned for tomorrow
flatfelds for EPIX & AGIPD (needed to be redone because of too low intensity during the previous measurements)
installation of the levitation device and first test measurements

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.

beam parameters: 7.7 keV seeded, 2.2 MHz, up to 20 pulses, 150 uJ/pulse

• user program, measuring IXS spectra of plasmons with high resolution using seeded beam and monochromators
• mono (re-)alignment to minimize the SASE pedestal of the seed. Need to search for good position of the beam on the crystals as with just a slight change in pointing, the transmission goes down and deteriorates the beam spot
• haveing troubles getting good transmission through the mono
• taking spectra with the monochromatized seeded beam on PMMA, SiO2 and Al to be compared with the non-monochromatized cold spectra with 20 bunches.
• second half of the train is often not lasing though transmission of the pulses through the warm mono seems ok

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

X-ray delivery

• 9.3 keV, up to 185 pulses at 564 kHz, 3.7  mJ, beam intensity drop, missing last 10-20 pulses in train sometime

Optical laser delivery

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

Achievements/Observations

• Alinment for TR-SFX and PAM
• Data collection for IHR

Issues

• Beam intensity was not that stable
• Strange scattering from amorphous sample and powder diffraction were appeared during data collection

X-ray delivery

• 9.3 keV, up to 185 pulses at 564 kHz, 3.7  mJ, stable delivery

Optical laser delivery

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

Achievements/Observations

• Alinment for TR-SFX
• Data collection in dark state and excited state at 203.5 ns

Issues

• MDL devices and macros on macrosever2 were dead around 19:30, took more than 2 hours for recovery. 
• Dark calibration issue

problems with machine operation

very low yield at 1.8keV, took ~2hrs tuning time to get 600uJ (linear taper)

SA3 cells opened without us knowing when hv was changed

observed strong pointing change (and beam profile shape) when changing

- SASE3 pulse timing

- photon energy

pointing change with changing photon energy was such that the beam would make it through the GATT only partially (att. 1). this is unprecedented.

X-ray delivery

• 9.3 keV, up to 185 pulses at 564 kHz, 2.7  mJ, stable delivery

Optical laser delivery

• PP Laser, 800nm, 50 fs, up to 62 pulses @ 188 kHz

Achievements/Observations

• Alinment for TR-SFX and data collection

Issues

• AGIPD vacuum gauge was in error, unplug and plug in fixed this error

X-ray delivery

• 9.3 keV, up to 185 pulses at 564 kHz, 2.4  mJ, stable delivery

Optical laser delivery

• PP Laser, 800nm, 50 fs, up to 62 pulses @ 188 kHz

Achievements/Observations

• Alinment for TR-SFX and data collection

Issues

• Nozzles were clogged a lot, crystals were formed on catcher cone.

Shift summary for 28th of Aug.
- Realigned the center of rotation. 
- MID took the seeded beam at about 120 uJ around 4 p.m. after the long intervention.
- Cross-checked the time zero with Bi 222 diffraction peak.
- Searching and collecting diffraction patterns from a single nanocrystal. 
The user will continue to find the optimized condition for the flux of X-ray and Laser. 

X-ray delivery

• 9.3 keV, up to 185 pulses at 564 kHz, 2.3  mJ, stable delivery

Optical laser delivery

• PP Laser, 800nm, 50 fs, up to 62 pulses @ 188 kHz

Achievements/Observations

• Alinment for TR-SFX and data collection

Issues

• Karabo did not work sometime, lost more than 1 hours

Shift summary for 29th of Aug.

- Conducted Time-resolved Bragg CDI experiment using 3rd harmonic pump laser. 
- Collected coherent diffraction patterns from Perovskite-oxide nanocrystals for various time delay and laser fluence. 
- Checked the correlations between the XGM, diamond detector in SDL, and two Jungfrau detectors running on interleave mode. 

• Received the beam from day shift, aligned to beam stop (low signal due to 4m air scatter, only 700uJ upstream)
  • ZYLA5 camera was having issues, restarted without rotating to limit dropped trains.
  • 1.2mm CVD solid attenuator in SA2 seems to be damaged
• We have trouble with our SEPS interlock after changes last week
  • We are supposed to be able to close the shutter (upstream of CRL3) without removing CRL3 to break hutch interlock, but it still sets bunches to zero. This was raised with DOC, and directly with Mikako who implemented this last week
• We aligned our beam through HED's CRL3
• Establish overlap with Relax laser, and timing on YAG (RF-lock only)
  • Issues with new camera ROI's being too large limiting readout to 3.3Hz
• Start cryojet at 22:00, see if we can squeeze in some laser shots to get signal levels tonight
• Alignment/transmission scans with XFEL planned overnight.