Measurement method of transformation of refined structure constant and system with the same applied

Abstract

The invention discloses a measurement method of transformation of a refined structure constant and a system with the same applied, and belongs to the technical field of atomic frequency standards. The system comprises an atomic clock group and a counter group, wherein the atomic clock group is composed of at least two atomic clocks, and the counter group is composed of at least two counters. Each atomic clock comprises an atomic clock physical system, an isolation amplifier, a frequency stability tester, a high-stability signal source, a micro-controller, a digital / analog (D / A) conversion module and a constant flow source module. According to the measurement method, the micro-controllers carry out measurement on output constant frequency of various atomic clocks in the atomic clock group through the counter group, wherein the frequency drifting is conducted on the atomic clocks, the output frequency output everyday by each atomic clock is represented through power series of the refined structure constant, and the transformation situation of the refined structure constant along with time is detected out. According to the measurement method of the transformation of the refined structure constant and the system with the same applied, transformation of the output frequency of a plurality of atomic clocks can be really reflected, and accordingly the transformation situation of the refined structure constant can be accurately measured out.

Description

technical field [0001] The invention relates to the technical field of atomic frequency standards, in particular to a method for measuring changes in fine structure constants and a system using the method. Background technique [0002] The fine structure constant is a fundamental physical constant of the interaction strength between atoms or molecules, which is defined as: [0003] α = e 2 4 π e 0 hc or α = e 2 2 e 0 hc [0004] Among them: e is the basic charge, e 0 is the vacuum permittivity, is the reduced Planck constant, h is Planck's constant, and c is the speed of light. [0005] According to the recommended...

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Problems solved by technology

Therefore, it is generally used to measure the change of the long-term frequency signal output of the atomic clock to measure the change of the fine structure constant. However, if an atomic clock works continuously for a long time, its output frequency value will change slowly over time, even in one direction. Variety

Therefore, if the frequency drift correction of multiple atomic frequency standards is not performed, the oscillation frequency output by multiple atomic clocks cannot be truly reflected, and the change of fine structure constants will have a large deviation

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