Closing distinguishing method of quasi-spherical resonant cavity

Abstract

The invention relates to a closing distinguishing method of a quasi-spherical resonant cavity. The closing distinguishing method comprises the steps of 1, placing the quasi-spherical resonant cavity in a constant-temperature chamber, placing the quasi-spherical resonant cavity on an optical platform by a support, and aligning an upper hemisphere and a lower hemisphere of the quasi-spherical resonant cavity for coincidence and alignment by an alignment ring; 2, completing coincidence and alignment of the two hemispheres, and introducing stable flow amount of high-purity low-temperature gas intothe quasi-spherical resonant cavity to complete connection and debugging of an experiment system; and 3, performing closing operation of the quasi-spherical resonant cavity, achieving accurate monitoring of a gap between an upper hemisphere equatorial plane and a lower hemisphere equatorial plane during the closing process by accurate measurement and control of a microwave signal and real-time calculation of relative excessive half width, and achieving accurate distinguishing on closing of the quasi-spherical resonant cavity according to a change trend of the relative recess half width. The new closing judging method has universality on a quasi-spherical structure, and quantitative comparison among different methods is facilitated by an evaluation index such as a perfect closing index.

Description

technical field [0001] The invention relates to a discriminating method, in particular to a discriminating method for closing of a quasi-spherical resonant cavity. Background technique [0002] A resonant cavity is a closed cavity that is widely used in basic measurement fields such as optics, electromagnetism, and acoustics. At present, common resonators in the field of electromagnetism include rectangular resonators, cylindrical resonators, spherical resonators, ellipsoid resonators and quasi-spherical resonators. Among them, the spherical resonant cavity is the simplest. In practice, due to limited processing technology and processing accuracy, it is impossible to produce a perfect spherical shape, and microwave association phenomenon will occur, resulting in a significant drop in the measurement accuracy of the resonant frequency. Therefore, a quasi-spherical resonant cavity is usually used to effectively separate the association modes and achieve high-precision measure...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems in the traditional quasi-spherical resonator closing method, such as the poor universality of the closing judgment method and the difficulty in judging the closing quality.

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