射频场幅度对铯原子磁力仪共振信号影响的研究  

Study of the influence of radio frequency field amplitude on the resonance signal of Cesium atomic magnetometers

作　　者：龙杰 罗海军 岳阳楼[1] 张政 杨晨 LONG Jie;LUO Haijun;YUE Yanglou;ZHANG Zheng;YANG Chen(Key Laboratory on Optoelectronic Functional Materials,College of Physics and Electronic Engineering,Chongqing Normal University,Chongqing 401331,China;National Center for Applied Mathematics in Chongqing,Chongqing Normal University,Chongqing 401331,China)

机构地区：[1]重庆师范大学物理与电子工程学院,光电功能材料重庆市重点实验室,重庆401331 [2]重庆师范大学重庆国家应用数学中心,重庆401331

出　　处：《激光杂志》2024年第11期25-30,共6页Laser Journal

基　　金：国家自然科学基金(No.51507023);重庆市自然科学基金(面上项目)(No.cstc2020jcyj-msxmX0726);重庆市教委科学技术研究项目(No.KJZD-K202100506)。

摘　　要：针对Mx型射频驱动磁共振磁力仪测量中射频场强度选择问题进行了实验研究。通过在无磁屏蔽环境下使用铯原子磁力仪系统,探究了射频场强度对共振信号特征的影响。实验采用扫频方式进行测量,并分析了共振信号的幅度、展宽、斜率等特征。研究结果表明,射频场强度约占待测磁场大小的3.6%~4.1%时信号共振点的幅值达到最大。此外,实验中还发现相位信号共振点斜率与射频场强度呈正相关变化,从而推导出系统弛豫速率与射频场强度呈反比关系。研究结果可对于确定合适的射频场强度提供一定的参考价值。Experimental research was conducted on the selection of radiofrequency field intensity in Mx-type radiofrequency-driven magnetic resonance magnetometer measurements.The influence of radiofrequency field intensity on the characteristics of resonance signals was investigated using a cesium atomic magnetometer system in an unmagnetized environment.Measurements were carried out using a frequency scanning method,and features such as signal amplitude,linewidth,and slope were analyzed.The results indicate that the optimal radiofrequency field intensity accounts for approximately 3.6%to 4.1%of the magnitude of the magnetic field being measured,at which point the amplitude of the signal resonance peak reaches its maximum value.Additionally,it was observed that the slope of the phase signal resonance peak varies directly with the radiofrequency field intensity,leading to the deduction that the system relaxation rate is inversely proportional to the radiofrequency field intensity.This research provides important guidance for determining suitable radiofrequency field intensities and offers innovative insights into magnetic resonance magnetometer measurements.

关 键 词：无磁屏蔽测量 射频场强度 共振信号特征 Mx型磁力仪 

分 类 号：TN247[电子电信—物理电子学]