• DocumentCode
    2840890
  • Title

    Performance of SAO model VLG-12 advanced hydrogen masers

  • Author

    Mattison, Edward M. ; Vessot, Robert F.C.

  • Author_Institution
    Smithsonian Astrophys. Obs., Cambridge, MA, USA
  • fYear
    1990
  • fDate
    23-25 May 1990
  • Firstpage
    66
  • Lastpage
    70
  • Abstract
    The performance of two VLG-12 masers that have operated at the US Naval Observatory is described. The effectiveness of the single-state selection system and of the storage bulb coatings is discussed. Among other results, it is shown that the masers´ initial frequency drift rates of several parts in 1015 per day decreased by factors of 2 to 4 over a period of 200 days
  • Keywords
    frequency measurement; hydrogen neutral atoms; masers; measurement standards; US Naval Observatory; VLG-12 masers; frequency drift rates; frequency measurement standard; single-state selection; storage bulb coatings; Atomic beams; Atomic measurements; Digital control; Frequency synthesizers; Hydrogen; Masers; Observatories; Seals; Vacuum systems; Vacuum technology;
  • fLanguage
    English
  • Publisher
    ieee
  • Conference_Titel
    Frequency Control, 1990., Proceedings of the 44th Annual Symposium on
  • Conference_Location
    Baltimore, MD
  • Type

    conf

  • DOI
    10.1109/FREQ.1990.177481
  • Filename
    177481
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=2840890