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Journal of molecular structure 1208, 127863 (2020). doi:10.1016/j.molstruc.2020.127863 special issue: "VSI: Jon Hougen.", The spatial separation of 2-propanol monomer from its clusters in a molecular beam by an electrostatic deflector was demonstrated. Samples of 2-propanol monomer with a purity of 90% and a beam density of $7 \times 10^6$ cm$^{-3}$ were obtained. These samples were utilized to study the femtosecond-laser-induced strong-field multi-photon ionization and fragmentation of 2-propanol using non-resonant 800 nm light with peak intensities of $3–7 \times 10^{13}$ W/cm$^2$., Published by Elsevier, New York, NY [u.a.]

Spatial separation of water dimer from water monomer and larger water-clusters through the electric deflector is presented. A beam of water dimer with $93~\%$ purity and a rotational temperature of $1.5~$K was obtained. Following strong-field ionization using a $35~$fs laser pulse with a wavelength centered around $800~$nm and a peak intensity of $10^{14}~\text{W}/\text{cm}^2$ we observed proton transfer and $46~\%$ of the ionized water dimer broke apart into a hydronium ion $\text{H}_3\text{O}^+$ and neutral OH.

We demonstrate the spatial separation of pyrrole and pyrrole(H2O) clusters from the other atomic and molecular species in a supersonically-expanded beam of pyrrole and traces of water seeded in high-pressure helium gas. The experimental results are quantitatively supported by simulations. The obtained pyrrole(H2O) cluster beam has a purity of ∼ 100 %. The extracted rotational temperature of pyrrole and pyrrole(H2O) from the original supersonic expansion is T rot = 0.8 ± 0.2 K, whereas the temperature of the deflected, pure-pyrrole(H2O) part of the molecular beam corresponds to T rot ≈ 0.4 K.

Review of scientific instruments 89(9), 096110 (2018). doi:10.1063/1.5026145, A knife edge for shaping a molecular beam is described to improve the spatial separation of the species in a molecular beam by the electrostatic deflector. The spatial separation of different molecular species from each other as well as from atomic seed gas is improved. The column density of the selected molecular-beam part in the interaction zone, which corresponds to higher signal rates, was enhanced by a factor of 1.5, limited by the virtual source size of the molecular beam., Published by American Institute of Physics, [S.l.]