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Differential pumping unit for windowless coupling of laser beams to ultra high vacuum

Tschernajew M, Gierschke P, Lin H, Hilbert V, Kurdal J, Stancalie A, Limpert J, Rothhardt J (2020)

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Publication Type: Journal article

Publication year: 2020

Journal

Book Volume: 178

Article Number: 109443

DOI: 10.1016/j.vacuum.2020.109443

Abstract

Current laser technology enables table-top high flux XUV sources with photon energies from several tens to several hundreds of eV via high harmonic generation in noble gases. Here we present a compact versatile coupling unit to establish windowless, and thus lossless coupling of such light sources to ultra high vacuum (UHV). The particular coupling unit has been developed to couple a XUV laser source to a heavy ion storage ring. Three-stage differential pumping allows to reduce the input pressure of ~10⁻⁶ mbar down to the 10⁻¹² mbar range at the output. The unit particularly reduces the partial pressure of argon, which is used to generate the XUV radiation, by 6 orders of magnitude. Measurements of the pressure distribution inside the different chambers agree well with theoretical simulations. In principle, this unit can also serve for other purposes, where a windowless vacuum coupling is needed, with a transition from High Vacuum (HV) levels to deep UHV, such as coupling to cryogenically cooled detectors, ion traps or to photoelectron emission spectroscopy experiments.

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How to cite

APA:

Tschernajew, M., Gierschke, P., Lin, H., Hilbert, V., Kurdal, J., Stancalie, A.,... Rothhardt, J. (2020). Differential pumping unit for windowless coupling of laser beams to ultra high vacuum. Vacuum, 178. https://dx.doi.org/10.1016/j.vacuum.2020.109443

MLA:

Tschernajew, Maxim, et al. "Differential pumping unit for windowless coupling of laser beams to ultra high vacuum." Vacuum 178 (2020).

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