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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