Calibration method for temperature and resistance value of cesium beam tube thermal resistor

Abstract

The invention provides a calibration method for temperature and resistance value of a cesium beam tube thermal resistor capable of calibrating the relationship between the temperature and resistance value of a thermal resistor in a vacuum seal cesium beam tube. The method comprises the following steps: firstly placing the cesium beam tube in a vacuum chamber, executing vacuum pumping and protecting operation to the vacuum chamber, heating the cesium beam tube, after heating to required temperature, recording the value of the temperature and the thermal resistor, adjusting the temperature and repeatedly executing the step to obtain the corresponding relationship between the temperature and resistance of the thermal resistor in the cesium beam tube. The thermocouple is not needed, so that the fault rate of the cesium beam tube caused by the change of the insulation characteristic of the thermocouple can be eliminated and the damage to the cesium furnace during the mounting process of the thermocouple can be avoided, the calibration data authenticity can be improved and the calibration method for temperature and resistance value of the cesium beam tube thermal resistor is widely applied to the preparation of the cesium beam tube.

Description

technical field [0001] The invention belongs to the field of atomic frequency standards, in particular to a method for calibrating the temperature and resistance of a cesium beam tube thermistor, which is suitable for calibrating the temperature and resistance of the cesium beam tube thermistor. Background technique [0002] Due to the advantages of high temperature measurement accuracy and good reliability of thermistor, it is widely used in cesium beam tubes. After vacuum sealing, it is necessary to re-calibrate the corresponding relationship between the temperature and resistance of the thermistor, but since the cesium beam tube is in a completely sealed state after vacuum sealing, it is difficult to calibrate. [0003] At present, the calibration of cesium beam tube thermistor is as follows: figure 1 The method shown: a thermocouple installation groove is designed on the surface of the cesium furnace, and the thermocouple is extruded and embedded in the installation gro...

AI Technical Summary

Problems solved by technology

[0006] When the thermocouple is drawn from the cesium beam tube to the outside, it is affected by the high-temperature baking process in the cesium beam tube manufacturing process, the thermocouple wire insulation material is limited, the insulation is relatively difficult, and short circuits are prone to occur in the production process, resulting in cesium The beam tube does not work properly;

[0007] The thermocouple is embedded in the cesium furnace by extrusion, which is easy to cause damage to the cesium furnace during installation

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