Title :
Dimensional sensitivity of end-to-end phase difference in ring terminated Ramsey cavities
Author :
De Marchi, Andrea ; Francescangeli, Oriano ; Bava, G.P.
Author_Institution :
Politecnico di Torino, Italy
fDate :
4/1/1993 12:00:00 AM
Abstract :
A transmission line analysis is reported of a long Ramsey cavity for a primary cesium beam frequency standard, terminated at the extremities with two waveguide rings for distributed phase shift minimization. The purpose of this effort is to understand the effect of the rings one end-to-end phase shift. Contributions to the latter from asymmetries in the Ramsey cavity long arms, in the similarity of the rings, and in the two coupling junctions between rings and Ramsey cavity, are separately analyzed as a function of frequency. It is shown that this third asymmetry source may be a cause of phase shift instability because of its linear dependence on frequency. The slope of this sensitivity to operating frequency is reduced by almost an order of magnitude if the rings are designed to be antiresonant instead of resonant
Keywords :
atomic beams; caesium; cavity resonators; frequency measurement; measurement standards; Cs; asymmetries; asymmetry source; coupling junctions; dimensional sensitivity; distributed phase shift minimization; end-to-end phase difference; phase shift; primary cesium beam frequency standard; ring terminated Ramsey cavities; transmission line analysis; waveguide rings; Arm; Atomic beams; Extremities; Frequency; Magnetic separation; Measurement standards; Phase measurement; Resonance; Stability; Transmission lines;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on