Influence of Spin Projection Noise on the Sensitivity of Cs Atom Magnetometer

Abstract

This article introduces the influence of laser's spin projection noise on the sensitivity of Cs atom magnetometer and concludes that the theoretical value of the spin projection noise is about1.23fT·Hz -1/2 under the optimization condi- tions of the atom steam chest, namely temperature as 105°C, volume as 0.0785cm 3 and molecular density as 1.7×10 13 cm -3 . Such research has provided us with the necessary basis for the experimental study on Cs atom magnetometer.