Method for increasing spin relaxation time of polarized gas in atom pool

Abstract

The invention relates to a method for increasing spin relaxation time of polarized gas in an atom pool. A light-induced desorption principle is adopted to accelerate escaping of polarized atoms from an anti-degradation polarized film to reduce time that the polarized atoms are adsorbed, nonuniformity in type and number of the atoms adsorbed on the surface of the anti-degradation polarized film is lowered, and gradient of an electric field on the anti-degradation polarized film is reduced. Through the above two physical mechanisms, probability of spin relaxation of polarized nuclei is lowered, and spin relaxation time of the polarized atoms is increased. By the method, spin relaxation time of atoms in the atom pool can be increased, and spin relaxation time of the polarized atoms with nuclear quadrupole moment can be increased especially; the method is of great significance in improving performance of an atomic magnetometer and an atomic spin gyroscope.

Description

technical field [0001] The invention relates to a method for prolonging the spin relaxation time of a polarized gas in an atomic pool, in particular to a method for prolonging the spin relaxation time of a polarized gas atom with a nuclear quadrupole moment, belonging to the field of atomic optics. Background technique [0002] Nuclear magnetic resonance technology is not only widely used in scientific research in physics, chemistry, and materials science, but also in the field of engineering technology. Atomic magnetometers and atomic spin gyroscopes are typical applications. In these two types of atomic devices, atomic pools are their core components. Generally, the atomic pool contains alkali metal gas, inert gas and buffer gas, and the inert gas atoms are indirectly polarized by optically pumping the alkali metal. Under this condition, the Larmor precession frequency of the inert gas extracted by the probe light produces a frequency shift, and then the angular velocity ...

AI Technical Summary

Problems solved by technology

[0006] In the existing buffer gas filling scheme, if the buffer gas is filled too much, the collision between the inert gas atoms and the buffer gas atoms will be violent, which will lead to the broadening of the nuclear resonance spectrum line; Atoms with polar moments are invalid

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