Laser heating device for atomic spin magnetic field test and heating method

Abstract

The invention discloses a laser heating device for an atomic spin magnetic field test. The device comprises an outer chamber, an inner chamber, a heat absorption sheet and a heating laser device, wherein the inner chamber is used for injecting a to-be-tested gas; the inner chamber is arranged in the outer chamber, and a vacuum layer is formed between the outer chamber and the inner chamber; the heat absorption sheet is installed on the wall of the inner chamber in an attached mode; and the heating laser device is located outside the outer chamber and is used for illuminating the heat absorption sheet to convert light energy into heat energy, so that the to-be-tested gas in the inner chamber is heated. The invention further discloses a heating method based on laser heating device for the atomic spin magnetic field test. According to the heating method, the heating laser device emits a laser to the heat absorption sheet, and the heat absorption sheet converts the light energy into the heat energy; and the heat energy of the heat absorption sheet is transmitted to the to-be-tested gas in the inner chamber through the wall of the inner chamber in a heat conduction mode, wherein the vacuum layer is used for performing thermal insulation on the inner chamber. The device and the method both have the advantages that heating speed is high, and test precision is high.

Description

technical field [0001] The invention mainly relates to the technical field of atomic spin magnetic field testing, in particular to a laser heating device and a heating method for atomic spin magnetic field testing. Background technique [0002] When using the spin of alkali metal atoms to test the ambient magnetic field of atoms, the alkali metal atoms will spin precess around the magnetic field. The size of the magnetic field is related to the spin precession. In the process, the alkali metal atoms need to be heated to a specific temperature. The existing gas heating method is mainly to heat the packaged gas cavity by means of thermal resistance contact heating or heat the gas cavity through heat transfer of hot gas, and then perform temperature measurement by thermocouples. The thermal resistance method heating itself and adding wires will generate a certain magnetic field, and the method of hot gas heat transfer needs to consume a lot of power, which is not suitable for ...

AI Technical Summary

Problems solved by technology

The thermal resistance method heating itself and adding wires will generate a certain magnetic field, and the method of hot gas heat transfer needs to consume a lot of power, which is not suitable for the use of small instruments. At the same time, due to the use of thermocouples to measure the temperature, a certain magnetic field will be generated. , so this kind of method will cause relatively large interference to the test of weak magnetic field. In order to reduce the interference, it will increase the complexity of the system, increase the system error, and affect the accuracy of the test.

In addition, the method of hot air heating needs to heat the heated air first, which requires a large power, which is not suitable for the use of small instruments and increases the overall complexity of the system.

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