Composite structure film for prolonging relaxation time of magnetometers and plating method of composite structure film

Abstract

The invention belongs to the technical field of measurement, specifically relates to a composite structure film for prolonging relaxation time of atomic magnetometers and a plating method of the composite structure film, and aims at improving the sensitivity of the atomic magnetometers. The composite structure film is plated on the inner wall of atom pool and consists of two parts: an inner-layer OTS film and an outer-layer olefin film. The composite structure film disclosed by the invention is capable of prolonging the relaxation time of alkali metal atoms and improving the high temperature resistance of films; through the OTS film, the high temperature resistance of relaxation films is improved, and an inhibiting effect to a certain extent is provided to the surface relaxation of the alkali metal atoms; and through adsorbing the olefin film on the surface of the OTS film, the advantages of the olefin film are utilized to remarkably improve the anti-relaxation effect of the films, the relaxation time of the alkali metal atoms is prolonged, and finally the sensitivity of the atomic magnetometers is improved.

Description

technical field [0001] The invention belongs to the field of measurement technology, and in particular relates to a composite film layer and a plating method for prolonging the relaxation time of an atomic pool in an alkali metal atomic magnetometer, which is of great significance for improving the sensitivity of the atomic magnetometer. Background technique [0002] Magnetic field is an important attribute of magnetic substances, and it is of great significance to the measurement of magnetic field. More than 2,000 years ago, the appearance of Sinan became the earliest magnetic field measurement tool. The rapid development of laser technology and quantum technology has greatly promoted the progress of precision magnetic field measurement technology. Precision magnetic field measurement technology has important applications in the fields of mineral resource detection, geological structure investigation, clinical medical diagnosis and earthquake prediction. The emergence of s...

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Problems solved by technology

[0008] The technical problem to be solved by the present invention is: aiming at improving the sensitivity of the magnetometer by prolonging the relaxation time of the alkali metal atoms, there are certain deficiencies in the existing two commonly used schemes (buffer gas filling, anti-relaxation film plating on the inner wall of the atomic pool) : Filling the atomic pool with a buffer gas can delay the diffusion time of the alkali metal atoms to the inner wall of the atomic pool, but at the same time, due to the collision between the alkali metal atoms and the buffer gas, the resonance line width is broadened; commonly used paraffin, OTS and other anti-relaxation films, Can not achieve the goal of both high-efficiency anti-relaxation effect and high temperature resistance

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