Cryogenic dual-mode resonator for a fly-wheel oscillator for a caesium frequency standard

IEEE Trans Ultrason Ferroelectr Freq Control. 2002 Oct;49(10):1349-55. doi: 10.1109/tuffc.2002.1041076.

Abstract

A dual-mode, sapphire-loaded cavity (SLC) resonator has been designed and optimized with the aid of finite element software. The resonance frequency was designed to be near the frequency of a Cs atomic frequency standard. Experimental tests are shown to agree very well with calculations. The difference frequency of two differently polarized modes is shown to be a highly sensitive temperature sensor in the 50 to 80 K temperature range. We show that an oscillator based on this resonator has the potential to operate with fractional frequency instability below 10(-14) for measurement times of 1 to 100 seconds. This is sufficient to operate an atomic clock at the quantum projection noise limit.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Cesium / chemistry*
  • Cold Temperature
  • Equipment Design
  • Equipment Failure Analysis
  • Equipment and Supplies* / standards
  • Models, Theoretical
  • Radio Waves
  • Reference Standards
  • Reproducibility of Results
  • Sensitivity and Specificity
  • Software
  • Time*

Substances

  • Cesium