Three techniques for measuring the transverse relaxation time of cesium atoms

Author:

Wei Mengmeng1ORCID,Yu Wenbin1ORCID,Zhou Min1ORCID,Huang Wei2ORCID,Liu Yuanxing2,Xu Xinye13ORCID

Affiliation:

1. State Key Laboratory of Precision Spectroscopy, East China Normal University 1 , Shanghai 200241, China

2. Beijing Institute of Aerospace Control Devices 2 , Beijing 100094, China

3. Shanghai Branch, Hefei National Laboratory 3 , Shanghai 201315, China

Abstract

The transverse relaxation time (T2) is an important indicator to determine the fundamental sensitivity limit of alkali-metal atomic magnetometers. We propose a method based on the principle of longitudinal field modulation that obtains T2 by scanning the transverse static magnetic field. The previous technique of extracting T2 from the linewidth of the modulation frequency and the traditional magnetic-resonance-broadening-fitting method are also described. The T2 measurements of Cesium (Cs) atoms are carried out through these three methods, whose operating environments are applicable to different atomic magnetometers, respectively. The method that we propose can be used for obtaining the T2 of Cs atoms as well as detecting the transverse static magnetic field and is customized for the study of the Cs–Xenon ensemble for the construction of nuclear magnetic resonance gyroscopes. Moreover, the relationship between the limit sensitivities and cell temperatures is further studied in the experiment.

Funder

National Natural Science Foundation of China

National Key Research and Development Program of China

Shanghai Municipal Science and Technology Major Project

Shanghai Excellent Academic Leaders Program

Publisher

AIP Publishing

Subject

General Physics and Astronomy

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