Cryogenic dual-mode resonator for a fly-wheel oscillator for a caesium frequency standard
Identifieur interne : 000B67 ( PascalFrancis/Curation ); précédent : 000B66; suivant : 000B68Cryogenic dual-mode resonator for a fly-wheel oscillator for a caesium frequency standard
Auteurs : Michael E. Tobar [Australie] ; John G. Hartnett [Australie] ; Eugene N. Ivanov [Australie] ; Dominique Cros [France] ; Pawel Bilski [Australie]Source :
- IEEE transactions on ultrasonics, ferroelectrics, and frequency control [ 0885-3010 ] ; 2002.
Descripteurs français
- Pascal (Inist)
English descriptors
- KwdEn :
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.
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<front><div type="abstract" xml:lang="en">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<sup>-14</sup>
for measurement times of 1 to 100 seconds. This is sufficient to operate an atomic clock at the quantum projection noise limit.</div>
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