Rostock 2019 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 17: Cluster II (joint session A/MO)
MO 17.9: Poster
Mittwoch, 13. März 2019, 16:15–18:15, S Fobau Physik
Setup and characterization of a helium liquid jet for diffractive imaging experiments — •Katharina Kolatzki1,2, Rico Mayro P. Tanyag1,2, Georg Noffz2, Anatoli Ulmer2, Daniela Rupp1,2, and Thomas Möller2 — 1MBI, Germany — 2IOAP TU Berlin, Germany
State-of-the-art XUV and X-ray facilities like high-harmonic generation sources and free-electron lasers enable the in-depth investigation of light-matter interaction via novel methods such as single-particle coherent diffractive imaging.
For such experiments, large helium droplets constitute a suitable target; they have a simple electronic structure and exhibit interesting properties like superfluidity. One way of creating these droplets is a helium liquid jet, which disintegrates in a Rayleigh-type breakup, forming large droplets with diameters of a few microns. Compared to the other regimes of helium droplet generation, droplets produced from jet disintegration have a narrower size distribution. This makes them eligible for time-resolved diffractive imaging experiments, where a reproducible target is indispensable.
Recently, we have constructed and characterized a source for a helium liquid jet, which will be put into use for example at the SQS endstation at the European XFEL. Via shadowgraphy methods, we can analyze the jet’s shape and the droplet size. Complementary, our setup allows to determine the average droplet size via collision with external gas particles. First results will be presented.