振幅
磁强计
谐波
磁场
放松(心理学)
磁阻
信号(编程语言)
灵敏度(控制系统)
物理
领域(数学)
拉莫尔进动
凝聚态物理
计算物理学
磁能
核磁共振
磁化
光学
电压
数学
电子工程
量子力学
计算机科学
社会心理学
工程类
心理学
程序设计语言
纯数学
作者
Yan Yin,Binquan Zhou,Kaifeng Yin,Junjian Tang,Xiaolin Ning,Bangcheng Han,Jiancheng Fang
标识
DOI:10.1088/1361-6501/abdb79
摘要
Abstract The comprehensive influence of the amplitude and frequency of the modulated magnetic field and the magnitude of the bias magnetic field on the performance of an atomic magnetometer have been investigated. Under different magnetic fields, the combined action of the spin precession signal caused by a high-amplitude magnetic field and the influence of magnetic field on relaxation makes the time domain output signal and the amplitude of the first to fourth harmonics show different characteristics, which cannot be explained by the classical analytical calculation solution. By considering the influence of the magnetic field on the transverse relaxation, a more complete model is constructed to explain the phenomenon with a numerical solution, and the overall fit is 93.26%. Based on the single beam and magnetic field modulation scheme, a compact magnetometer is constructed for verification, with a volume of 56.7 cm 3 and a sensitivity of 30 fT/Hz 1/2 .
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