Title :
Cryogenic sapphire dielectric resonators: performance and potential
Author :
Langham, Conway D. ; Gallop, John C.
Author_Institution :
Nat. Phys. Lab., Teddington, UK
fDate :
4/1/1997 12:00:00 AM
Abstract :
Sapphire dielectric resonators (SDR) at cryogenic temperatures have been used to produce oscillators of exceptional short- and medium-term stability. We discuss the demonstrated performance achieved at the National Physical Laboratory (NPL) as well as potential long-term capabilities of this type of oscillator both as a “fly-wheel” standard for atomic clocks and in a possible determination of the fundamental physical constants
Keywords :
cryogenics; dielectric resonator oscillators; frequency measurement; low-temperature techniques; measurement standards; microwave oscillators; sapphire; superconducting cavity resonators; temperature control; Al2O3; NPL; National Physical Laboratory; atomic clocks; cryogenic sapphire dielectric resonators; cryogenic temperatures; fly-wheel standard; fundamental physical constants; medium-term stability; short-term stability; superconductivity; Cavity resonators; Clocks; Cryogenics; Dielectrics; Laboratories; Niobium; Oscillators; Resonant frequency; Stability; Temperature;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
