Device for improving uncertainty of black body radiation frequency shift of atomic optical lattice clock

Abstract

The invention discloses a device for improving the uncertainty of black body radiation frequency shift of an atomic optical lattice clock. The device comprises a black body radiation shielding cavity, the black body radiation shielding cavity comprises an annular cavity body, an upper cavity cover, a lower cavity cover, channels for an atom beam to go in and go out including an inlet channel and an outlet channel, and first to eighth flat window sheets used by an optical channel. A thin waist light beam enters from a first round copper plate and exits from a second round copper plate, and the thin waist light beam enters from a third round copper plate and exits from a fourth round copper plate. According to the invention, a thermal radiation environment with a uniform and stable temperature can be provided for atoms at room temperature, the uncertainty of the black body radiation frequency shift of the atomic optical lattice clock is improved, the extremely high vacuum degree of an experiment system is maintained, no extra electrostatic field or static magnetic field is brought in, and therefore, the atomic optical lattice clock has extremely high precision and has an important application prospect in the field of high-precision atomic clocks.

Description

technical field [0001] The invention relates to the field of atomic frequency standards, in particular to a device for improving the uncertainty of black body radiation frequency shift of an atomic optical lattice clock. It is suitable for thermal radiation analysis, precision measurement, atomic frequency standard and other fields. Background technique [0002] At present, the stability and uncertainty of the atomic optical lattice clock have entered the order of 10^(-18), and its performance is far superior to that of the cesium atomic fountain clock as a primary frequency standard. seconds" definition. The blackbody radiation frequency shift is an important factor restricting the uncertainty of atomic optical lattice clocks. Therefore, improving the uncertainty caused by the frequency shift of black body radiation is of great significance for atomic optical lattice clocks. [0003] The blackbody radiation frequency shift of atomic optical lattice clocks is caused by th...

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Problems solved by technology

Under the condition of room temperature, the implementation scheme of precisely controlling the ambient temperature of the experimental device to improve the frequency shift of the black body radiation of the optical clock, but how to make a thermal radiation shielding cavity suitable for a high vacuum environment, there are many technical and material limitations

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