Suppression of the vapor cell temperature error in a spin-exchange relaxation-free comagnetometer  

作　　者：Jia-Li Liu Li-Wei Jiang Chi Fang Xin Zhao Yuan-Qiang Chen 刘佳丽;姜丽伟;方驰;赵鑫;陈远强(National Institute of ExtremelyWeak Magnetic Field Infrastructure,Hangzhou 310051,China;Institute of Largescale Scientific Facility and Centre for Zero Magnetic Field Science,Beihang University,Beijing 100191,China;Zhejiang Provincial Key Laboratory of UltraWeak MagneticField Space and Applied Technology,Hangzhou Innovation Institute,Beihang University,Hangzhou 310051,China)

机构地区：[1]National Institute of ExtremelyWeak Magnetic Field Infrastructure,Hangzhou 310051,China [2]Institute of Largescale Scientific Facility and Centre for Zero Magnetic Field Science,Beihang University,Beijing 100191,China [3]Zhejiang Provincial Key Laboratory of UltraWeak MagneticField Space and Applied Technology,Hangzhou Innovation Institute,Beihang University,Hangzhou 310051,China

出　　处：《Chinese Physics B》2024年第12期236-241,共6页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant Nos.62103024 and 61925301);in part by the Aeronautical Science Foundation(Grant No.2023Z073051012)。

摘　　要：The fluctuation of the vapor cell temperature leads to the variations of the density of the alkali metal atoms,which seriously damages the long-term stability of the spin-exchange relaxation-free(SERF)comagnetometer.To address this problem,we propose a novel method for suppressing the cell temperature error by manipulating the probe laser frequency.A temperature coefficient model of the SERF comagnetometer is established based on the steady-state response,which indicates that the comagnetometer can be tuned to a working point where the output signal is insensitive to the cell temperature fluctuation,and the working point is determined by the relaxation rate of the alkali metal atoms.The method is verified in a K-Rb-^(21)Ne comagnetometer,and the experimental results are consistent with the theory.The theory and method presented here lay a foundation for the practical applications of the SERF comagnetometer.

关 键 词：spin-exchange relaxation-free atomic comagnetometer cell temperature error probe laser frequency 

分 类 号：TH762.3[机械工程—仪器科学与技术]