Ion optical frequency standard blackbody radiation temperature evaluation method

Abstract

The invention discloses an ion optical frequency standard blackbody radiation temperature evaluation method. The method includes: adopting finite element analysis software to build a blackbody radiation finite element analysis model; measuring emissivity measurement values of the surfaces of different component materials in an ion trap; calculating an emissivity measurement value needs to be set when the blackbody radiation temperature is sensed by ions, and calculating the blackbody radiation temperature Teff j sensed by the ions and an effective solid angle omega eff j; measuring the temperature measurement value of each part of the actual ion trap, and calculating the corresponding uncertainty; calculating the blackbody radiation temperature Teff sensed by the ions; and calculating theblackbody radiation temperature uncertainty contribution caused by the temperature of each part of the actual ion trap. The method has the advantages of precise evaluation result, convenience, easy operation and the like. And the blackbody radiation temperature sensed by the ions can be precisely obtained.

Description

technical field [0001] The invention belongs to the technical field of ion optical frequency standard uncertainty evaluation, and in particular relates to an ion optical frequency standard blackbody radiation temperature evaluation method. Background technique [0002] Thanks to its excellent precision and stability, optical frequency standard technology based on trapped atoms / ions has been developed rapidly. At present, the relative uncertainty of the best optical frequency marker system can reach 10 -18 level, which is 2 orders of magnitude higher than the Cs microwave clock uncertainty defined as seconds. For most optical frequency standard systems, to get the uncertainty overall into 10 -18 , one of the uncertainty contributions that must be overcome is the black body radiation (BBR) frequency shift. The uncertainty of blackbody radiation frequency shift mainly depends on the blackbody radiation frequency shift evaluation coefficient Δα 0 Uncertainty and uncertainty ...

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Problems solved by technology

The second term is the uncertainty of the temperature of each component of the captivity system, which is limited by the accuracy of temperature measurement and evaluation

[0007] Based on the above analysis, it can be seen that the existing method combined with the finite element analysis model has the disadvantages of complex models and cumbersome evaluation process when evaluating the radiation temperature of the ion optical frequency standard blackbody. At the same time, there are many uncertainty factors, which all affect the blackbody Accurate assessment of radiant temperature

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