Home Publications Research Grants Inventions & Patents Awards Additional Research Activities Faculties & Institutions Research Areas

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)

---

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.

Involved external institutions

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://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).

BibTeX: Download