A New Microwave Synthesis Chain for the Primary Frequency Standard NIST-F1

Abstract

We present the design and measurements of the microwave synthesis chain presently used in NIST-F1, the laser-cooled cesium fountain primary frequency standard in operation at NIST, Boulder, CO. The chain has been used in two accuracy evaluations of NIST-F1 (January 2005 and July 2005), each of which had a combined (Type A and Type B) fractional frequency uncertainty of - 0.5 x 10-15. Additionally, this synthesis chain was in use during a recent calibration of the 199Hg+ optical clock transition against Cs, which had a fractional uncertainty of 9.1 x 10-16.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 2005
Accession Number
ADA484957

Entities

People

  • E. A. Donley
  • F. Levi
  • Steven R. Jefferts
  • T. E. Parker
  • T. P. Heavner

Organizations

  • National Institute of Standards and Technology

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Amplitude Modulation
  • Atomic Beam Masers
  • Clocks
  • Frequency
  • Frequency Standards
  • High Density
  • Masers
  • Measurement
  • Microwaves
  • Monitoring
  • Monitors
  • Oscillators
  • Schematic Diagrams
  • Standards
  • Temperature Coefficients
  • Time Intervals
  • Transitions

Readers

  • Molecular and Cellular Biochemistry
  • Positioning, Navigation, and Timing (PNT) Technology.

Technology Areas

  • Directed Energy