ausblenden:
Schlagwörter:
SCATTERINGInstruments & Instrumentation; Optics; Physics; X-ray diffraction; single-particle imaging; coherent diffractive
imaging; aperture; background scattering; signal-to-noise ratio;
Zusammenfassung:
The success of diffraction experiments from weakly scattering samples strongly depends on achieving an optimal signal-to-noise ratio. This is particularly important in single-particle imaging experiments where diffraction signals are typically very weak and the experiments are often accompanied by significant background scattering. A simple way to tremendously reduce background scattering by placing an aperture downstream of the sample has been developed and its application in a single-particle X-ray imaging experiment at FLASH is demonstrated. Using the concept of a post-sample aperture it was possible to reduce the background scattering levels by two orders of magnitude.