• DocumentCode
    3448844
  • Title

    Recent Improvements in NIST-Fl and Resulting Accuracies of δf/f<7x10-16

  • Author

    Heavner, T.P. ; Jefferts, S.R. ; Donley, E.A. ; Shirley, J.H. ; Parker, T.E.

  • Author_Institution
    Time & Frequency Div., National Inst. of Stand. & Technol., Boulder, CO
  • fYear
    2004
  • fDate
    June 27 2004-July 2 2004
  • Firstpage
    498
  • Lastpage
    499
  • Abstract
    Since our last publication describing the accuracy budget for NIST-FI (a laser-cooled Cs fountain primary frequency standard) the authors have made many improvements resulting in nearly a factor of 2 reduction in the uncertainty in the realization of the SI second. Recently the authors reported a combined standard fractional uncertainty of 0.67times10-15
  • Keywords
    Zeeman effect; blackbody radiation; frequency standards; measurement uncertainty; NIST-F1; accuracy budget; laser-cooled fountain; primary frequency standard; standard fractional uncertainty; uncertainty reduction; Atomic beams; Fiber lasers; Laser theory; Masers; Optical noise; Optical scattering; Packaging; Physics; Power lasers; Uncertainty;
  • fLanguage
    English
  • Publisher
    ieee
  • Conference_Titel
    Precision Electromagnetic Measurements Digest, 2004 Conference on
  • Conference_Location
    London
  • Print_ISBN
    0-7803-8493-8
  • Electronic_ISBN
    0-7803-8494-6
  • Type

    conf

  • DOI
    10.1109/CPEM.2004.305330
  • Filename
    4097341
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=3448844