4 results about "Hyperfine structure" patented technology

The invention discloses a multi-material 3D printing device based on a photo-thermal coupling effect and a forming method of the multi-material 3D printing device, and relates to the field of additive manufacturing. The light source device is a semicircular convergent photo-thermal emitting device, 360-degree light source irradiation can be achieved, and illumination is uniform. After the slurry is extruded, the ultraviolet curing process can be immediately carried out, and the phenomenon that a printed entity collapses due to the influence of gravity factors caused by untimely light source irradiation can be obviously reduced. By adjusting the frequency and duty ratio of the light source, the temperature and illumination intensity of the slurry in the extrusion device are adjusted, so that the slurry is easier to extrude and form, and the formation of a hyperfine structure is realized; and a multi-axis moving platform is adopted, so that multi-angle complex structural parts can be easily formed. The extrusion device is used as a core, and high integration of the printing device is achieved. The printing efficiency is greatly improved, ultrahigh-precision and ultrahigh-height printing of a complex structure is achieved, and the problems of collapse caused by gravity factors and difficulty in forming a high-precision structural part are solved.

The invention relates to a coherent state preparation method of an alkali metal hot atom ensemble, which realizes transverse statistical spinning coherent state of the alkali metal hot atom ensemble in a room temperature environment based on the alkali metal hot atom ensemble, and comprises the following steps of: actively applying a magnetic field to enable a Zeeman sub-energy level of a hyperfine structure of alkali metal atom electron spinning to generate distinguishable splitting; zeeman sub energy level population is measured by means of Faraday type interaction of light and atoms, and high polarizability of electron spinning is realized by utilizing pumping of circularly polarized light and atom spinning, so that a coherent state of alkali metal atoms is prepared, preparation of a quantum state under a room-temperature macroscopic condition is facilitated, and the method is suitable for industrial production. And a low-cost research platform is provided for related research of quantum precision measurement.

The invention discloses a lithium atom scattering cross section calculation method, device and system, and a storage medium. The method comprises the following steps: calculating the relative transition intensity of each transition line of a lithium atom D2 line; the lithium atom D2 comprises a D2 line of 7Li and a D2 line of 6Li; according to the D2 line hyperfine structure of the lithium atoms, the deviation frequency of each transition line relative to the center line is calculated; doppler broadening is calculated according to each line frequency; according to Doppler broadening, an absorption cross section at a peak value is obtained through calculation; according to the absorption cross section at the peak value, obtaining a relation graph between the scattering cross section of 7Li and the frequency and a relation graph between the scattering cross section of 6Li and the frequency; and multiplying the relation graph of the scattering cross section of 7Li and the frequency and the relation graph of the scattering cross section of 6Li and the frequency by respective isotope abundance, and adding to obtain a total scattering cross section. By adopting the technical scheme of the invention, the backscattering cross section of the lithium atom can be accurately calculated.

The application discloses a wide-spectrum multi-wavelength laser frequency stabilization system of an atomic transition reference, and a wide-spectrum multi-wavelength laser frequency stabilization method of an atomic transition reference, wherein the spectrum peak of an atomic hyperfine structure obtained by saturated absorption spectrum is used to realize the frequency stabilization of laser, and the frequency multiplication and frequency mixing of laser are used to realize the calibration of the long-term stability of the wavelength meter to multiple laser wavelengths without affecting the wavelength accuracy of the calibration laser. In addition, the calibrated wavelength meter is used to accurately measure multiple laser wavelengths, and the hierarchical feedback adjustment mechanism of coarse adjustment and fine adjustment is used to realize the accurate locking of multiple laser wavelengths. The application overcomes the wavelength measurement drift of the wavelength meter caused by environmental changes, improves the measurement accuracy of the wavelength meter, guarantees the long-term stable and accurate operation of the wavelength meter, and guarantees the high-precision frequency stabilization of multiple laser wavelengths.