优化 NMR 陀螺仪中的氙气和氙弛豫，使用缓冲气体压力和壁涂层。

Optimizing Xe and Xe relaxation in an NMR gyroscope using buffer gas pressure and wall coating.

机构信息

School of Instrumentation and Optoelectronic Engineering, Beihang University, Beijing 100191, China; Hefei National Laboratory, Hefei 230088, China.

出版信息

J Magn Reson. 2023 Jul;352:107430. doi: 10.1016/j.jmr.2023.107430. Epub 2023 Apr 19.

DOI:10.1016/j.jmr.2023.107430

PMID:37141801

Abstract

The accuracy of inertial measurement performed by the nuclear magnetic resonance gyroscope (NMRG) with two isotopes depends on the duration of transverse relaxation. Extending the relaxation of the xenon isotopes at the same time plays a very important role in the accuracy of gyro. The relaxation time of Xe and Xe can be increased to about 15-20 s by optimizing the buffer gas pressure of N at about 0.57 amg and coating RbH, respectively. According to the results of theoretical analysis and experimentation, the gyro stability reaches 0.6°/h, and the active measurement volume is 3 × 3 × 3 ∼ mm.

摘要

核磁共振陀螺（NMRG）中两种同位素的惯性测量精度取决于横向弛豫的持续时间。同时延长氙同位素的弛豫时间对陀螺的精度起着非常重要的作用。通过分别将 Xe 和 Xe 的缓冲气体压力优化至约 0.57 amg 的 N2 和涂覆 RbH，可将它们的弛豫时间分别延长至约 15-20 s。根据理论分析和实验结果，陀螺稳定性达到 0.6°/h，主动测量体积为 3×3×3∼mm。