By Topic

Ultra-stable sapphire resonator-oscillator

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

4 Author(s)
Luiten, A.N. ; Western Australia Univ., Nedlands, WA, Australia ; Mann, A.G. ; Giles, A.J. ; Blair, D.G.

Preliminary measurements of the properties of cryogenic sapphire resonators with various concentrations of paramagnetic impurities are reported. These resonators are mounted in both copper and niobium shields. It is found that one can achieve extrema in the frequency-temperature function in the temperature range 5-18 K due to the compensating effects of the dielectric constant temperature dependence and the Curie law dependence on the susceptibility of the paramagnetic impurities. In samples where dominant paramagnetic impurity has a high ESR (electron spin resonance) unloaded resonator Q factors as high as 4×109 are observed. The increased Q factors coupled with reduced shield interactions should result in an improvement in frequency stability for an oscillator based around this resonator as compared to the best results achieved to date as the authors' laboratory (an Allan variance of 9×10-15). The preliminary measurement of the tilt sensitivity of the oscillator is reported to be a fractional frequency shift of 6.5×10-12 per degree

Published in:

Instrumentation and Measurement, IEEE Transactions on  (Volume:42 ,  Issue: 2 )