Vacuum cavity system on side wall opening type fountain atomic clock

Abstract

A holed side wall type upper vacuum chamber system of a fountain atomic clock comprises a cold atom free flying area vacuum chamber wall, a microwave cavity, four rectangular protruding holes, seal covers of the rectangular protruding holes, a lower vacuum chamber wall, a vacuum flange and a seal glass window, wherein the lower vacuum chamber wall is connected with a lower vacuum chamber. The upper vacuum chamber system is characterized in that the positions, corresponding to four microwave coupling waveguides of the microwave cavity, on the side wall of an upper vacuum chamber, are provided with the four rectangular protruding holes respectively, the rectangular microwave coupling waveguides of the fountain clock are installed by forming the holes in the side wall of the vacuum chambers, the diameter of a cold atom free flying area vacuum chamber is greatly reduced, the total area of the vacuum wall and the size of the vacuum chambers are greatly reduced, the upper vacuum chamber system has the advantages that the size of the vacuum chambers is small, preparation is facilitated under the vacuum environment and a microwave system is easy to adjust, and the minimization of the fountain clock can be achieved.

Description

technical field [0001] The invention relates to a fountain atomic clock, in particular to a vacuum chamber system on a fountain atomic clock with holes in the side wall. Background technique [0002] The vacuum chamber system on the fountain atomic clock is a vacuum chamber system that provides the required vacuum environment for the microwave cavity of the fountain atomic clock and the free flight area of ​​cold atoms, and is an essential part of the fountain clock system. The upper vacuum chamber system is the largest vacuum part in the vacuum system of the fountain atomic clock, and the vacuum preparation and maintenance of the upper vacuum chamber is a key part of the construction of the fountain clock. Since the Paris Observatory successfully developed the first cold atomic fountain clock in 1996, the United States, Germany, Italy, the United Kingdom, Japan and China have successfully developed their own fountain clocks, and the structure of subsequent fountain clocks b...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide an upper vacuum chamber system of a fountain atomic clock with openings in the side wall, so as to solve the problems of large volume of the middle and upper vacuum chamber system of the existing fountain atomic clock, great difficulty in preparing and maintaining the vacuum environment, and great difficulty in adjusting the microwave system

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