Multi-period automatic fitting of pulse duration improves NMRG longitudinal relaxation time measurement accuracy

Xuelei Wang; Jianli Li; Huining Shang; Heng Yuan; Zhanchao Liu

doi:10.1117/12.2604337

24 November 2021 Multi-period automatic fitting of pulse duration improves NMRG longitudinal relaxation time measurement accuracy

Xuelei Wang, Jianli Li, Huining Shang, Heng Yuan, Zhanchao Liu

Author Affiliations +

Proceedings Volume 12065, AOPC 2021: Optical Sensing and Imaging Technology; 120650S (2021) https://doi.org/10.1117/12.2604337
Event: Applied Optics and Photonics China 2021, 2021, Beijing, China

Abstract

Nuclear magnetic resonance gyroscopes(NMRG) have received widespread attention to the fields of national defense and civil applications due to their potential for miniaturization and low cost. The relaxation time is an important parameter to measure the performance of the alkali vapor cell of the NMR gyroscope, the most commonly used industry standard measurement method of longitudinal relaxation time(T₁) is the measurement method using π pulse plus 1/2π pulse, so the measurement accuracy of the T₁ is affected by the accuracy of the pulse duration. Usually the maximum value of the signal amplitude correspond to the time of 1 /2πpulse duration, but it cannot eliminate the influence of the random error of the system, the use of multiple cycles to automatically fit the pulse duration improves the accuracy of the pulse duration, saves a lot of measurement time, eliminates human error, and ultimately improves the T₁ measurement accuracy.

Citation Download Citation

Xuelei Wang, Jianli Li, Huining Shang, Heng Yuan, and Zhanchao Liu "Multi-period automatic fitting of pulse duration improves NMRG longitudinal relaxation time measurement accuracy", Proc. SPIE 12065, AOPC 2021: Optical Sensing and Imaging Technology, 120650S (24 November 2021); https://doi.org/10.1117/12.2604337

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