A Variable Parameter Test System for Cesium Source Emitted Beam Intensity

Abstract

The invention discloses a variable parameter test system for cesium source emission beam intensity. The invention can accurately control the distance and inclination angle from the detector to the collimator exit, thereby improving the analysis accuracy of the beam intensity emitted by the cesium source and reducing the pollution of the cesium beam. The test system of the present invention adopts the form between the fixed bracket and the movable bracket to change the distance and angle between the detector and the cesium source, so that the coordinates of the detector relative to the cesium source can be measured with a measuring tool such as a micrometer, which can be conveniently and accurately Obtaining the distance and included angle between the two solves key problems such as detector displacement limitation and inclination calculation, thereby effectively improving the analysis accuracy of the emitted beam intensity of the cesium source; at the same time, the bellows are used to connect the cesium source and detector, which can The problem of sealing and vacuum is solved, the cesium beam pollution is reduced, and the safety of the test system is improved. The test system can be used for variable parameter measurement and analysis of various particle beam intensities.

Description

technical field [0001] The invention relates to the technical field of cesium beam tube performance testing, in particular to a variable parameter testing system for cesium source emission beam intensity. Background technique [0002] The cesium beam tube is the core component of the cesium atomic clock. The beam intensity of the cesium atomic beam in the cesium beam tube after it escapes the collimator has a direct impact on the signal-to-noise ratio of the cesium beam tube and the short-term stability of the cesium clock. The current measurement system mainly has the following two schemes: [0003] A) The cesium beam detector performs angular scanning around the collimator exit, the distance D between the detector and the collimator exit is constant, and the beam intensity distribution is a function of the angle θ between the detector axis and the collimator axis. The scheme is as follows figure 1 shown; [0004] B) The cesium beam detector moves on a straight track perp...

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Problems solved by technology

[0006] Scheme A can observe the state of θ>90°, but the distance D between the detector and the exit of the collimator cannot be changed; Scheme B can change the distance D and the included angle θ to obtain a more comprehensive measurement result of the beam intensity distribution, but The variation range of the included angle θ is limited. These two schemes have limitations and cannot meet the requirements of parameter changes in beam intensity measurement. Therefore, it is necessary to improve the measurement scheme and build a beam intensity variable parameter testing system.

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