Related Experiment Video
Updated: Aug 1, 2026

Fabrication and Characterization of Superconducting Resonators
Published on: May 21, 2016
Cryogenic dual-mode resonator for a fly-wheel oscillator for a caesium frequency standard
Michael E Tobar1, John G Hartnett, Eugene N Ivanov
1University of Western Australia, Crawley, Australia. mike@physics.uwa.edu.au
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.
Related Concept Videos
Concept of Resonance and its Characteristics
Atomic Nuclei: Larmor Precession Frequency
Oscillations In An LC Circuit
RLC Circuit as a Damped Oscillator
Consider a series RLC circuit. Here, the presence of resistance in the circuit leads to energy loss due to joule heating in the resistance. Therefore, the total electromagnetic energy in the circuit is no longer constant and decreases with time. Since the magnitude of charge, current, and potential difference continuously decreases, their oscillations are said to be damped. This is...
Double Resonance Techniques: Overview
Spin decoupling is usually achieved by...
Design Example: Underdamped Parallel RLC Circuit
Starting with a fixed...

