Rapid measurement method of 129Xe-Rb spin exchange rate

A technology of spin exchange and measurement method, applied in the fields of spectral analysis and optical detection, can solve the problems of complex measurement methods and achieve the effect of improving the signal-to-noise ratio

Active Publication Date: 2018-09-14
BEIHANG UNIV
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Problems solved by technology

The Cates group of Princeton University in the United States used to measure the transverse relaxation time T of the atomic nucleus

Method used

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  • Rapid measurement method of 129Xe-Rb spin exchange rate
  • Rapid measurement method of 129Xe-Rb spin exchange rate
  • Rapid measurement method of 129Xe-Rb spin exchange rate

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Experimental program
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Embodiment Construction

[0041] by 129 The Xe nuclear magnetic resonance gyroscope is used as an example to specifically illustrate the use of the present invention to measure the spin exchange rate of atomic nuclei in an alkali metal gas chamber.

[0042] The present invention will be further described below in conjunction with the accompanying drawings. Such as figure 1 Shown is the nuclear magnetic resonance gyroscope that the method for the present invention adopts 129 Schematic diagram of the Xe-Rb spin exchange rate measurement setup. The alkali metal gas chamber 6 is located at the center of the nuclear magnetic resonance gyroscope, and its interior is encapsulated with alkali metal atoms, inert gas and buffer gas; its exterior surrounds the oven 7, three-dimensional magnetic coil 8 and magnetic shielding barrel 13 sequentially from the inside to the outside; The pumping light emitted by the pumping laser 4 passes through the noise attenuator 2, the polarizer-3 and the pumping laser into cir...

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Abstract

The invention discloses a rapid measurement method of a 129Xe-Rb spin exchange rate, which is applied to a nuclear magnetic resonance gyroscope. The method comprises the following steps: firstly, heating an alkali metal air chamber; applying a direct-current magnetic field to z axis and applying a non-resonance magnetic field to x axis to obtain a proportional coefficient of an output voltage signal of a ZI phase-locking amplifier and the amplitude of the magnetic field of the x axis; then closing the non-resonance magnetic field and applying a resonance magnetic field to the x axis; finishingthe output of the signal through the ZI phase-locking amplifier; finally, calculating the 129Xe-Rb spin exchange rate. According to the method disclosed by the invention, the blank in the prior art that a rapid and effective rapid measurement method of the 129Xe-Rb spin exchange rate is lacked is filled up and guarantees are provided for improving the nucleon polarizability.

Description

technical field [0001] The invention belongs to the technical fields of optical detection and spectral analysis, and in particular relates to a gyroscope suitable for nuclear magnetic resonance gyroscopes. 129 Fast measurement method of Xe-Rb spin exchange rate. Background technique [0002] The nuclear magnetic resonance gyroscope has the characteristics of small size, low power consumption, high performance, and large dynamic range, and has become the research focus and hotspot of new inertial devices. The performance of the NMR gyroscope is affected by the macroscopic magnetic moment of the atomic nucleus spin, and is directly related to the polarizability and relaxation time of the atomic nucleus. In order to improve the signal-to-noise ratio and relaxation time of the gyroscope, it is necessary to accurately measure 129 Xe-Rb spin exchange rate, thereby improving gyroscope performance. [0003] The nuclear magnetic resonance gyroscope is mainly composed of four major...

Claims

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Application Information

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IPC IPC(8): G01C19/60
CPCG01C19/60
Inventor 周斌权房建成陈琳琳吴文峰王婧
Owner BEIHANG UNIV
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