Open AccessIn-Situ Measurement of the Density Ratio of the K-Rb-21Ne Comagnetometer Based on Electron Spin Relaxation Rate
Author(s) -
Tian Zhao,
Kai Wei,
Yueyang Zhai,
Chencheng Tang
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2112/1/012010
Subject(s) - relaxation (psychology) , sensitivity (control systems) , spin (aerodynamics) , electron density , electron , density ratio , atomic physics , materials science , analytical chemistry (journal) , physics , chemistry , nuclear physics , thermodynamics , electronic engineering , psychology , social psychology , chromatography , mechanics , engineering
Accurate measurement of alkali metal density ratio in hybrid vapor cells is essential for high sensitivity of comagnetometers. We introduce and investigate a new method of measuring the density ratio based on electron spin-relaxation rate. The Bloch equations including the parameter of density ratio are studied, and the density measurement results show that measurement uncertainty is less than 12%. The advantage of this method is measuring the in-situ density ratio, which is more precise and useful for optimizing sensitivity of comagnetometers by adjusting the density ratio in real time.