title: Note: Thickness determination of freestanding ultra-thin foils using a table top laboratory extreme ultraviolet source.
abstract: We present a versatile and handy method allowing a thickness determination of freestanding thin plastic foils by its transmission characteristics in the extreme ultraviolet (EUV) spectrum. The method is based on a laser induced plasma source, emitting light in the EUV region, a compact double-mirror EUV monochromator operating at a fixed wavelength of 18.9 nm, and a CCD camera. The measurement delivers transmission values with a standard deviation of ΔT = 0.005 enabling foils thickness characterization with nm-accuracy at a given foil density and stoichiometric composition. Well characterized freestanding ultra-thin foils can be directly implemented in, e.g., high intensity laser matter experiments without further manipulation.
authors.affiliation: Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie, Berlin 12489, Germany.
authors.forename: J
authors.initials: J
authors.lastname: Braenzel
authors.forename: C
authors.initials: C
authors.lastname: Pratsch
authors.forename: P
authors.initials: P
authors.lastname: Hilz
authors.forename: C
authors.initials: C
authors.lastname: Kreuzer
authors.forename: M
authors.initials: M
authors.lastname: Schnürer
authors.forename: H
authors.initials: H
authors.lastname: Stiel
authors.forename: W
authors.initials: W
authors.lastname: Sandner