Reference : Hydrogen maser magnetron cavity with low frequency-temperature coefficient
E-prints/Working papers : First made available on ORBi
Physical, chemical, mathematical & earth Sciences : Physics
http://hdl.handle.net/2268/259845
Hydrogen maser magnetron cavity with low frequency-temperature coefficient
English
Van Der Beken, Emeline mailto [Université de Liège - ULiège > Département de physique > Spectroscopie atomique et Physique des atomes froids >]
Léonard, Daniel mailto []
Bastin, Thierry mailto [Université de Liège - ULiège > Département de physique > Spectroscopie atomique et Physique des atomes froids >]
2021
No
[en] hydrogen maser
[en] In this Letter we show how a proper dimensioning of a magnetron cavity and its inner bulb allows one to design a hydrogen maser atomic clock with an arbitrary low frequency-temperature coefficient (FTC) for its cavity. The control of this parameter is of primary importance for the overall stability of the atomic clock. To this aim, a model based on finite element method (FEM) has been developed to simulate thermal expansion of hydrogen maser cavities and evaluate the FTC. The model has been confronted with direct experimental data and very good agreement is observed. A key geometrical parameter is identified that allows for a strong tuning of the FTC, so as to set it down to values a priori as close as desired to 0, with limitations only dictated by the machining tolerances of the mechanical elements of the hydrogen maser cavity.
Région wallonne SKYWIN AHM convention No. 7506
http://hdl.handle.net/2268/259845

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