title: The gas-phase photoemission beamline at Elettra.
abstract: This paper reports the present stage of commissioning of the gas-phase photoemission beamline at Elettra, Trieste. The beamline is designed for atomic and molecular science experiments with high-resolution and high-flux synchrotron radiation. It consists of an undulator source, variable-angle spherical-grating monochromator and two experimental stations. The design value of the energy range is 20 to 800 eV with a specified resolving power of over 10000. The procedure adopted for calibration of this type of monochromator is discussed. At present a resolving power up to 20000 and a range up to 900 eV have been measured. Absorption spectra taken at the argon L(II,III)-edge and at the nitrogen, oxygen and neon K-edges are as sharp as, or sharper than, any reported in the literature. The instrumental broadening is well below the natural line-width making it difficult to quantify the resolution; this problem is discussed.
authors.affiliation: Sincrotrone Trieste, I-34012 Trieste, Italy.
authors.forename: K C
authors.initials: KC
authors.lastname: Prince
authors.forename: R R
authors.initials: RR
authors.lastname: Blyth
authors.forename: R
authors.initials: R
authors.lastname: Delaunay
authors.forename: M
authors.initials: M
authors.lastname: Zitnik
authors.forename: J
authors.initials: J
authors.lastname: Krempasky
authors.forename: J
authors.initials: J
authors.lastname: Slezak
authors.forename: R
authors.initials: R
authors.lastname: Camilloni
authors.forename: L
authors.initials: L
authors.lastname: Avaldi
authors.forename: M
authors.initials: M
authors.lastname: Coreno
authors.forename: G
authors.initials: G
authors.lastname: Stefani
authors.forename: C
authors.initials: C
authors.lastname: Furlani
authors.forename: M
authors.initials: M
authors.lastname: De Simone
authors.forename: S
authors.initials: S
authors.lastname: Stranges