Nuclear magnetic resonance (NMR) device and measurement method based on laser atomic magnetometer

Abstract

The invention discloses a nuclear magnetic resonance (NMR) device based on a laser atomic magnetometer, and the NMR device comprises a cesium atom vapor bubble, a magnetic shielding bushing which is sleeved on the cesium atom vapor bubble, three groups of Helmholtz coils which are arranged inside the magnetic shielding bushing, a polarization device which is used for polarizing cesium atoms inside the cesium atom vapor bubble, a laser transmitting device which is used for transmitting detection laser to the cesium atom vapor bubble, a detection device which is used for detecting an NMR signal of the detection laser penetrating the cesium atom vapor bubble and a pneumatic sample feeding device which is used for pre-polarizing a sample to be detected and can place the pre-polarized sample on the cesium atom vapor bubble. The invention also discloses a measurement method of an NMR based on the laser atomic magnetometer. The device and the method are high in detection sensitivity, free from needing low-temperature refrigeration, low in running cost and lower in working temperature.

Description

technical field [0001] The invention belongs to the field of nuclear magnetic resonance (Nuclear magnetic resonance, NMR) spectroscopy, more specifically relates to an NMR device based on a laser atomic magnetometer, and also relates to a measurement method for NMR based on a laser atomic magnetometer, which is suitable for 100uT~1nT (1uT=10 -6 T, 1nT=10 -9 T) Detection of NMR signals under a magnetic field. u Background technique [0002] NMR is a technique used to obtain information about the structure and dynamics of atoms and molecules made up of atoms. NMR works on nuclei, and only on nuclei with non-zero spins. These non-zero nuclear spins are like small magnets with north and south poles, which have magnetic moments, so they can be used in NMR Research. [0003] When these magnetic moments are in the external static magnetic field, because there is an angle between the magnetic moment and the external static magnetic field, precession occurs. When the nucleus is ...

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Problems solved by technology

[0013] The purpose of the present invention is to aim at the above-mentioned problem that prior art exists, provide a kind of NMR device based on laser atomic magnetometer, also provide a kind of NMR measurement method based on laser atomic magnetometer, thereby solve the existing radio frequency coil under the low field Difficulties with insufficient sensitivity of the method and addressing the emerging problem of excessive temperature of the atomic vapor bubble

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