Alkali metal gas chamber filling method for reducing temperature sensitivity of alkali metal vapor density

Abstract

The invention discloses a method for filling an alkali metal air chamber for reducing the temperature sensitivity of the alkali metal vapor density, which comprises the following steps: connecting the alkali metal air chamber to a vacuum table, and removing the alkali metal air chamber through heating and vacuumizing processes Then fill the alkali metal gas chamber with excess alkali metal, heat the alkali metal gas chamber to a temperature above the set temperature, and keep it at this temperature for more than 1 day, so that the surface of the inner wall of the alkali metal can fully absorb Alkali metal; fill with working gas other than alkali metal; adjust the temperature of the alkali metal gas chamber to the set temperature, at this time, the density of the alkali metal vapor inside the alkali metal gas chamber is balanced at the set temperature and kept at this temperature Aging was performed for more than 1 day; the alkali metal gas cell was removed from the vacuum table. The invention makes the alkali metal gas chamber work at the working temperature, the alkali metal vapor will not increase significantly, greatly reduces the temperature sensitivity of the alkali metal density, and achieves the purpose of improving the stability of the atomic sensor.

Description

technical field [0001] The invention belongs to the technical field of atomic sensing, in particular to a method for filling an alkali metal gas chamber for reducing the temperature sensitivity of alkali metal vapor density. Background technique [0002] Alkali metal atoms (133Cs, 87Rb, 85Rb, 23Na, 39K) have only one valence electron outside the nucleus, the energy level structure is simple, and it is easy to operate by laser, so it has been widely used in the field of atomic sensing and measurement: (1) NMR The gyroscope usually uses one or more alkali metal atoms, and uses the spin-exchange optical pumping technology to polarize the alkali metal atoms. It is used to form a magnetometer to detect nuclear spin motion information. This nuclear magnetic resonance gyroscope has the advantages of small size and high precision, and has great application potential in the field of inertial technology. (2) The atomic magnetometer uses the change of the precession frequency of the ...

AI Technical Summary

Problems solved by technology

This requirement increases the complexity of the system structure and leads to the temperature sensitivity of the device, which becomes one of the difficulties in product development.