Non-magnetic temperature control device for atom magnetic detection and measurement method

Abstract

The invention provides a non-magnetic temperature control device for atom magnetic detection and a measurement method. The device comprises a heating light path module and an atom gas chamber temperature control module, the atomic gas chamber temperature control module is used for absorbing gaseous alkali metal atoms with required atomic number density generated by heating laser, and comprises a first optical filter, an atomic gas chamber, a second optical filter, a temperature measurement resistor and a temperature control processor; the heating light path module is used for providing heating laser with required heat for the atomic gas chamber and comprises a heating laser controller, a heating laser, a first spectroscope, a first reflecting mirror, a second reflecting mirror and a second spectroscope. The measuring method comprises the steps of assembling the device, emitting heating laser to the atomic gas chamber by adopting the heating laser, setting a target temperature through the temperature control processor and the like. The temperature control of the atomic gas chamber can be realized on the premise of not introducing an additional magnetic field, the atomic number density of working atoms in the atomic gas chamber is improved, the magnetic signal detection sensitivity is improved, and the measurement range is expanded.

Description

technical field [0001] The invention relates to the technical field of magnetic field measurement, in particular to a non-magnetic temperature control device and a measurement method for atomic magnetic detection. Background technique [0002] Atomic magnetic detection technology is the most sensitive magnetic field measurement method that has been verified so far. The device that realizes atomic magnetic detection is also called atomic magnetometer. Atomic magnetometers have broad application prospects in the fields of material analysis, geological exploration, biomedicine and industrial testing. The working substance of the atomic magnetometer is generally an alkali metal atom. There is only one electron in the outermost layer of an alkali metal atom. The electron spin has a magnetic moment, and it will precess around the direction of the magnetic field in an external magnetic field environment. The precession frequency is proportional to the amplitude of the environment...

AI Technical Summary

Problems solved by technology

Thermal air heating basically does not introduce additional magnetic fields, but the device is bulky, and thermal air will also disturb the optical path

The electric heating method will introduce a magnetic field. Generally, it is driven by alternating current, so that the frequency range of the magnetic field introduced by heating falls outside the working frequency band of the magnetometer, which limits the measurement range of the magnetometer to a certain extent.

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