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A: Fachverband Atomphysik
A 4: Clusters I (joint session MO/A)
A 4.6: Vortrag
Montag, 9. März 2020, 12:30–12:45, f102
Optimizing Aerodynamic Lens Geometries for Gold Nanoparticle Beams — •Lena Worbs1,2, Jannik Lübke1,2,3, Armando Estillore1, Amit K. Samanta1, Lourdu Xavier Paulraj1, Kartik Ayyer1,4, and Jochen Küpper1,2,3 — 1Center for Free-Electron Laser Science, Deutsches Elektronen-Synchrotron DESY, Hamburg — 2Fachbereich Physik, Universität Hamburg — 3Center for Ultrafast Imaging, Hamburg — 4Max Planck Institute for the Structure and Dynamics of Matter, Hamburg
Coherent diffractive imaging at free-electron lasers promises to allow the reconstruction of the three-dimensional molecular structures of isolated particles at atomic resolution [1]. However, because of the typically low signal to noice ratio, this requires the collection of a large amount of diffraction patterns. Since every intercepted particle is destroyed by the intense x-ray pulse, a new and preferably identical sample particle has to be delivered into every pulse. One delivery technique is an aerodynamic lens stack (ALS), providing collimated or focused beams of nanoparticles. With the aid of numerical simulations we optimized the geometry of an ALS to produce high-density beams of nanoparticles, e.g., gold nanoparticles. Here, we present the simulation result for an optimized ALS and its experimental characterization using novel laser-based particle detection techniques [2]. We also show an application of ALS for XFEL experiments on gold nanoparticles.
[1] M. M. Seibert, et al., Nature 470, 78 (2011).
[2] L. Worbs, et al., Opt. Expr., arXiv:1909.08922 [physics.optics]