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The basic structural features of a system of double sorting of atoms by quantum states within the limits of given constraints are considered. The system is included in the hydrogen generator of a commercial hydrogen frequency standard. Results of calculations of the trajectories of the atoms in a double sorting system are presented and the selection of a method of creating an inversion region is evaluated.
A prototype of a hydrogen generator with double selection of atoms by quantum state is developed. Results of measurements of the instability of the frequency of a hydrogen frequency standard based on this generator are presented.
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