Mainz 2017 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
A: Fachverband Atomphysik
A 10: Diffraction and Coherences (with MO)
A 10.2: Vortrag
Montag, 6. März 2017, 17:30–17:45, N 6
Numerical simulations for characterizing and optimizing an aerodynamic lens — •Nils Roth1, Salah Awel1,2, Daniel Horke1,3, and Jochen Küpper1,2,3 — 1Center for Free-Electron Laser Science, DESY, Notkestrasse 85, 22607 Hamburg, Germany — 2Department of Physics, University of Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany — 3The Hamburg Center for Ultrafast Imaging, Luruper Chaussee 149, 22761 Hamburg, Germany
Atomic resolution single-particle coherent diffractive imaging requires reproducible samples to reconstruct three-dimensional molecular structures from isolated particles [1]. Currently one of the major limiting factors is the inefficient delivery of particles and the correspondingly low number of strong diffraction patterns, collected during typical beam times. We build a numerical simulation infrastructure capable of calculating the flow of gas and the trajectories of particles through an entire aerosol injector, aiming to increase the fundamental understanding and to enable optimization of injection geometries and parameters. The simulation results are compared to literature studies and also validated against experimental data taken in an aerosol beam characterization setup [2]. The simulation yields a detailed understanding of the radial particle distribution and highlights weaknesses of current aerosol injectors. With the aid of these simulations we develop new experimental implementations to overcome current limitations and increase particle densities available for diffractive imaging experiments.
[1] M. M. Seibert, et al, Nature 470, 78 (2011).
[2] Salah et al, Opt. Exp. 24, 6507-6521 (2016)