A method of measuring nuclear polarizability by atomic spin gyroscope based on adiabatic fast channel

Abstract

A method for measuring nuclear polarizability with an atomic spin gyroscope based on an adiabatic fast channel, by using an adiabatic fast channel to flip the macroscopic polarization direction of the nuclear spin, and using an electron paramagnetic resonance method to measure the external polarization before and after the flip. The nuclear spin polarizability can be determined by the resonant frequency difference of the layer electrons, which can accurately measure the nuclear polarizability of the atomic gyroscope in real-time and in situ when it works online, which is beneficial to the miniaturization of the gyroscope and the closed-loop precise control of the nuclear polarizability.

Description

technical field [0001] The invention relates to a technology for measuring nuclear polarizability with an atomic gyroscope, in particular to a method for measuring nuclear polarizability with an atomic spin gyroscope based on an adiabatic fast channel. flip, and use the electron paramagnetic resonance method to measure the difference between the resonance frequencies of the outer electrons before and after the flip to determine the nuclear spin polarizability. It is beneficial to the miniaturization of the gyroscope and the closed-loop precise control of nuclear polarizability. Background technique [0002] Atomic spin gyroscopes based on Spin-Exchange Relaxation-Free (SERF) technology have the characteristics of high theoretical accuracy, small size, low cost, and small dynamic range, and are suitable for future platform-based inertial navigation systems. Among them, the main core element to realize the fixed axis of the atomic spin gyroscope is the macroscopic polarizatio...

AI Technical Summary

Problems solved by technology

However, this detection method mainly has the following disadvantages: 1. It cannot shield the influence of the background noise of the transverse magnetic field on the detection results; 2. It can only obtain the proportional change of the nuclear spin polarization intensity, and cannot accurately measure the nuclear spin polarization intensity; 3. , Introduce detection light for indirect measurement, which inevitably couples various noises in the detection process; 4. Each FID measurement is non-destructive measurement, which cannot realize online non-destructive real-time measurement

The above problems will lead to the inability to accurately measure the nuclear spin polarization, and at the same time, the closed-loop control of the nuclear spin polarization intensity cannot be realized, so that the closed-loop control of the fixed axis of the gyro will not be possible, which will affect the zero-bias stability of the gyro

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