Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: New aerodynamic lens injector for single particle diffractive imaging   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 yield good agreement with
particle-trajectory simulations.

1
The categories of this paper are: cs
21
The categories of this paper are: adap-org
31
The categories of this paper are: ao-sci
8
The categories of this paper are: hep-ex
13
The categories of this paper are: quant-ph
27
The categories of this paper are: comp-gas
14
The categories of this paper are: math-ph
22
The categories of this paper are: chao-dyn
29
The categories of this paper are: funct-an
11
The categories of this paper are: hep-lat
10
The categories of this paper are: q-bio
0
The categories of this paper are: hep-ph
15
The categories of this paper are: nucl-ex
32
The categories of this paper are: atom-ph
20
The categories of this paper are: acc-phys
30
The categories of this paper are: q-alg