title: Cryogenic dual-mode resonator for a fly-wheel oscillator for a caesium frequency standard.
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.
authors.affiliation: University of Western Australia, Crawley, Australia. mike@physics.uwa.edu.au
authors.forename: Michael E
authors.initials: ME
authors.lastname: Tobar
authors.forename: John G
authors.initials: JG
authors.lastname: Hartnett
authors.forename: Eugene N
authors.initials: EN
authors.lastname: Ivanov
authors.forename: Dominique
authors.initials: D
authors.lastname: Cros
authors.forename: Pawel
authors.initials: P
authors.lastname: Bilski
mesh_terms: D002586:Cesium / Q000737:chemistry*; D003080:Cold Temperature; D004867:Equipment Design; D019544:Equipment Failure Analysis; D004864:Equipment and Supplies / Q000592:standards; D008962:Models, Theoretical; D011846:Radio Waves; D012015:Reference Standards; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D012984:Software; D013995:Time
chemical_list: D002586:Cesium