New aerodynamic lens injector for single particle diffractive imaging

Roth, N.; Horke, D. A.; Lübke, J.; Samanta, A. K.; Estillore, A. D.; Worbs, L.; Pohlman, N.; Ayyer, K.; Morgan, A.; Fleckenstein, H.; Domaracky, M.; Erk, B.; Passow, C.; Correa, J.; Yefanov, O.; Barty, A.; Bajt, S.; Kirian, R. A.; Chapman, H. N.; Küpper, J.

doi:10.1016/j.nima.2023.168820

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Journal Article

New aerodynamic lens injector for single particle diffractive imaging

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Ayyer, K.
Center for Free-Electron Laser Science, Deutsches Elektronen-Synchrotron DESY;
Center for Ultrafast Imaging, Universität Hamburg;
Computational Nanoscale Imaging, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;

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https://arxiv.org/abs/2012.11237
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https://doi.org/10.1016/j.nima.2023.168820
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Citation

Roth, N., Horke, D. A., Lübke, J., Samanta, A. K., Estillore, A. D., Worbs, L., et al. (2024). New aerodynamic lens injector for single particle diffractive imaging. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1058: 168820. doi:10.1016/j.nima.2023.168820.

Cite as: https://hdl.handle.net/21.11116/0000-0007-DC34-7

Abstract

An aerodynamic lens injector was developed specifically for the needs of single-particle diffractive imaging experiments at free-electron lasers. Its design allows for quick changes of injector geometries and focusing properties in order to optimize injection for specific individual samples. Here, we present results of its first use at the FLASH free-electron-laser facility. Recorded diffraction patterns of polystyrene spheres are modeled using Mie scattering, which allowed for the characterization of the particle beam under diffractive-imaging conditions and yielded good agreement with particle-trajectory simulations.
The complex refractive index of polystyrene at λ = 4.5 nm was determined as m = 0.976 − 0.001i.