DocumentCode :
667846
Title :
Design and realization of a low phase gradient microwave cavity for a continuous atomic fountain clock
Author :
Devenoges, L. ; Bernier, L.-G. ; Morel, Jean-Michel ; Di Domenico, G. ; Jallageas, A. ; Petersen, Mark ; Thomann, P.
Author_Institution :
Fed. Inst. of Metrol., METAS, Bern-Wabern, Switzerland
fYear :
2013
fDate :
21-25 July 2013
Firstpage :
235
Lastpage :
238
Abstract :
Recently, microwave phase gradients were identified as the main source of uncertainty in the continuous fountain clock. Indeed, because of its particular geometry with two interaction zones, a dedicated research effort was necessary to reduce this effect. With the help of 3D finite element simulations and ultra-precise machining, we report here on the design and realization of a new kind of low phase gradient microwave cavity. The proposed geometry based on a ring waveguide of rectangular cross-section has a theoretical spatial phase variation of 30 μrad over the interaction zones, which corresponds to a predicted relative frequency shift below 10-15.
Keywords :
atomic clocks; finite element analysis; microwave circuits; 3D finite element simulations; continuous atomic fountain clock; low phase gradient microwave cavity; microwave phase gradients; rectangular cross-section; ring waveguide; ultra-precise machining; Atomic clocks; Cavity resonators; Electromagnetic waveguides; Frequency measurement; Microwave theory and techniques; Resonant frequency; Atomic clock; Distributed Cavity Phase Shift; FE simulations; Microwave Cavity; Phase Gradient;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
European Frequency and Time Forum & International Frequency Control Symposium (EFTF/IFC), 2013 Joint
Conference_Location :
Prague
Type :
conf
DOI :
10.1109/EFTF-IFC.2013.6702208
Filename :
6702208
Link To Document :
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