Method for predicting service life of electron multiplier of cesium atomic clock

An electron multiplier and prediction method technology, which is applied in the direction of single semiconductor device testing, instrumentation, measuring electricity, etc., can solve the problems of short service life, no service life prediction of electron multiplier, and fast decay rate.

Pending Publication Date: 2021-05-11
LANZHOU INST OF PHYSICS CHINESE ACADEMY OF SPACE TECH
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

Due to the great difficulty of development, the current electron multiplier still has the problems of fast decay rate and short service life, which has become a key issue affecting the service life of cesium atomic clocks. In a sense, the service life of electron multipliers is the service li

Method used

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  • Method for predicting service life of electron multiplier of cesium atomic clock
  • Method for predicting service life of electron multiplier of cesium atomic clock

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Embodiment 1

[0025] In this embodiment, a method for predicting the service life of a cesium atomic clock electron multiplier provided by the present invention is adopted, and the data in the falling phase of the operating voltage of the electron multiplier are selected for analysis. The test data time is 1 month, and the test data is drawn as In the figure, the ordinate is the test time T, and the abscissa is the working voltage U. According to the figure, the trend line is fitted to form a linear equation mathematical expression U=0.00003889T-1254.2, and the average daily voltage increase is 0.56 volts / day. According to the operating voltage value U of the electron multiplier entering the falling phase 0 =-1254.2V, and the electron multiplier cut-off operating voltage value U t =-2650V, the difference U between the two d =U t -U 0 =-1396V, it is obtained that the electron multiplier has a service life of T under the output of 50nA r =U d / a = 6.83 years.

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Abstract

The invention discloses a method for predicting the service life of an electron multiplier of a cesium atomic clock, and the method comprises the steps: obtaining the change rule of the working voltage of the electron multiplier of the cesium atomic clock based on the analysis of the long-term operation data of the cesium atomic clock, and obtaining the service life of a newly developed electron multiplier of the cesium atomic clock through the analysis and calculation according to the rule. The blank of the method for predicting the service life of the electron multiplier is filled, the prediction deviation is less than 10%, and the service life of the cesium atomic clock can be directly deduced.

Description

technical field [0001] The invention belongs to the technical field of vacuum electrons, and in particular relates to a method for predicting the service life of an electron multiplier of a cesium atomic clock. Background technique [0002] High-precision cesium magnetic separation atomic clock is an important part of the precision time-frequency system, widely used in communication, navigation and positioning, timekeeping, measurement and precision strike and other fields. Compared with rubidium atomic clocks and hydrogen atomic clocks, magnetically separated cesium atomic clocks have the characteristics of good long-term stability and low drift rate. In the cesium atomic clock, the intensity of the cesium ion beam after magnetic separation is very weak, only 5×10-12 amperes, such a small current signal cannot be used for signal identification, nor can it be used for frequency identification. It can only be amplified It is only about 5×10-8 amperes to facilitate signal ide...

Claims

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Application Information

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IPC IPC(8): G01R31/26
CPCG01R31/2601
Inventor 郭磊侍椿科崔敬忠王骥陈江刘志栋杨炜
Owner LANZHOU INST OF PHYSICS CHINESE ACADEMY OF SPACE TECH
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