• DocumentCode
    2373134
  • Title

    NIST-7, the new US primary frequency standard

  • Author

    Drullinger, R.E. ; Lowe, J.P. ; Glaze, D.J. ; Shirley, Jon

  • Author_Institution
    Nat. Inst. of Stand. & Technol., Boulder, CO, USA
  • fYear
    1993
  • fDate
    2-4 Jun 1993
  • Firstpage
    71
  • Lastpage
    74
  • Abstract
    NIST-7, an optically pumped, cesium-beam frequency standard, has replaced NBS-6 as the official US primary frequency standard. The present short-term stability of the standard, measured with respect to an active hydrogen maser, is characterized by σ/t(τ) ≈88 × 10-13 τ-1/2/. A first evaluation has resulted in an uncertainty of 4 × 10-14. An improved servo-electronic system is being developed which should improve stability and allow more precise evaluation of the various systematic errors
  • Keywords
    atomic clocks; frequency measurement; frequency stability; measurement standards; NBS-6; NIST-7; US primary frequency standard; active H maser; optically pumped Cs beam frequency standard; servo-electronic system; short-term stability; systematic errors; Atom optics; Atomic beams; Frequency conversion; Hydrogen; Masers; NIST; Optical frequency conversion; Optical polarization; Optical pumping; Stability;
  • fLanguage
    English
  • Publisher
    ieee
  • Conference_Titel
    Frequency Control Symposium, 1993. 47th., Proceedings of the 1993 IEEE International
  • Conference_Location
    Salt Lake City, UT
  • Print_ISBN
    0-7803-0905-7
  • Type

    conf

  • DOI
    10.1109/FREQ.1993.367379
  • Filename
    367379
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=2373134