• DocumentCode
    1428339
  • Title

    Cryogenic fountain development at NIST and INRIM: preliminary characterization

  • Author

    Levi, Filippo ; Calosso, Claudio ; Calonico, Davide ; Lorini, Luca ; Bertacco, Elio K. ; Godone, Aldo ; Costanzo, Giovanni A. ; Mongino, Barbara ; Jefferts, Steven R. ; Heavner, Thomas P. ; Donley, Elizabeth A.

  • Author_Institution
    Ist. Naz. di Ricerca Metrologica, Torino, Italy
  • Volume
    57
  • Issue
    3
  • fYear
    2010
  • fDate
    3/1/2010 12:00:00 AM
  • Firstpage
    600
  • Lastpage
    605
  • Abstract
    This paper describes the new twin laser-cooled Cs fountain primary frequency standards NIST-F2 and ITCsF2, and presents some of their design features. Most significant is a cryogenic microwave interrogation region which dramatically reduces the blackbody radiation shift. We also present a preliminary accuracy evaluation of IT-CsF2.
  • Keywords
    blackbody radiation; cryogenics; frequency standards; laser cooling; microwave technology; INRIM; IT- CsF2; NIST-F2; blackbody radiation shift; cryogenic microwave interrogation region; primary frequency standards; twin laser-cooled Cs fountain; Cryogenics; Electromagnetic heating; Frequency; Laboratories; NIST; Nitrogen; Physics; Temperature dependence; Testing; Uncertainty;
  • fLanguage
    English
  • Journal_Title
    Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on
  • Publisher
    ieee
  • ISSN
    0885-3010
  • Type

    jour

  • DOI
    10.1109/TUFFC.2010.1453
  • Filename
    5422501
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=1428339