Brightness and virtual source size of a supersonic deuterium beam (Articolo in rivista)

Type
Label
  • Brightness and virtual source size of a supersonic deuterium beam (Articolo in rivista) (literal)
Anno
  • 2012-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1103/PhysRevA.86.043804 (literal)
Alternative label
  • Thomas Reisinger, Martin M. Greve, Sabrina D. Eder, Gianangelo Bracco, and Bodil Holst (2012)
    Brightness and virtual source size of a supersonic deuterium beam
    in Physical review. A; The American Physical Society, Ridge, NY (Stati Uniti d'America)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Thomas Reisinger, Martin M. Greve, Sabrina D. Eder, Gianangelo Bracco, and Bodil Holst (literal)
Pagina inizio
  • 043804-1 (literal)
Pagina fine
  • 043804-10 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://pra.aps.org/abstract/PRA/v86/i4/e043804 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 86 (literal)
Rivista
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  • 10 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 4 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Department of Physics and Technology, University of Bergen, Allegaten 55, 5007 Bergen, Norway Department of Physics and CNR-IMEM, University of Genova, V. Dodecaneso 33, 16146 Genova, Italy (literal)
Titolo
  • Brightness and virtual source size of a supersonic deuterium beam (literal)
Abstract
  • Supersonic beams have numerous applications in research fields ranging from spectroscopy with nanodroplets to surface science and matter-wave microscopy. Thus, measurement and prediction of their properties is of considerable interest. In this paper we present measurements of the virtual-source size and its brightness, as well as the terminal speed and terminal speed ratio of a supersonic deuterium (D2) beam. The speed distribution data were measured with time-of-flight experiments and Fresnel zone-plate imaging was used to measure virtual source size. The point-spread function of the zone plate was simulated based on the measured wavelength distribution and used to extract the width of the virtual source and its brightness from the focus measurement. The experiments were carried out with a 10-?m-diameter nozzle and a source temperature of T0 = 310 K in the pressure range p0 = 3-171 bars and for T0 = 106 K in the pressure range p0 = 3-131 bars.We found that using deuterium as opposed to helium results in a virtual source that is about a factor 2 brighter under similar stagnation conditions. A comparison between the measured data and the predictions from a theoretical model based on the Boltzmann equation, which explicitly include the coupling between translational and rotational degrees of freedom as well as the real-gas properties of D2, resulted in good correspondence for the two different interaction potentials we tried. A careful comparison with the experimental results shows that the potential by Buck et al. [J. Chem. Phys. 78, 4439 (1983)] is moderately better than the Lennard-Jones potential at describing the expansion dynamics. (literal)
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