Dresden 2020 – scientific programme
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BP: Fachverband Biologische Physik
BP 19: Poster VII
BP 19.16: Poster
Tuesday, March 17, 2020, 14:00–16:00, P2/3OG
Optimizing aerodynamic-lens-stack geometries for nanoparticle injection — Lena Worbs1,3, •Jannik Lübke1,2,3, Armando Estillore1, Amit Kumar Samanta1, and Jochen Küpper1,2,3 — 1Center for Free-Electron Laser Science, Deutsches Elektronen-Synchrotron (DESY), Hamburg, Germany — 2Center for Ultrafast Imaging, Universität Hamburg, Germany — 3Department of Physics, Universität Hamburg, Germany
Single-particle imaging (SPI) experiments at x-ray free-electron lasers (XFELs) promise high-resolution-imaging of the structure and dynamics of nanoparticles. By guiding isolated sample molecules to the focus of an XFEL, diffraction patterns of individual particles can be collected. Sufficient amounts of patterns of identical nanoparticles are needed to overcome the inherently small signal-to-noise ratio and reconstruct the underlying 3D structure [1]. To achieve atomic resolution, a beam of identical particles needs to be delivered into the XFEL focus, which necessitates sample-control methods. We develop various control techniques, such as particle beam focusing using fluid dynamics [2], temperature control [3], charge state selectivity using electric fields, and further methods. Here, we present theoretical and experimental studies for improving of aerodynamic-lens geometries [3] to create high-density particle beams for SPI experiments.
[1] M. M. Seibert et al., Nature 470, 78 (2011)
[2] N. Roth et al., J. Aerosol Sci. 124, 17 (2018)
[3] A. K. Samanta et al., arXiv:1910.12606 (2019)