The warm atomic optical clock is an important development direction of miniaturized optical clock.As the core of the warm atomic optical clock,the non-magnetic temperature control is one of the key technologies of the warm atomic optical clock.The temperature fluctuation and magnetic field noise introduced by heating will affect the stability of the warm atomic optical clock.In view of the high-precision non-magnetic temperature control requirements of the warm atomic optical clock with cesium double photon transition,a double layer non-magnetic temperature control system is designed in this paper.The four-wire system is used to collect temperature information,and the PID is simulated to realize feedback temperature control.The heating components are designed with double snake heating film to reduce the magnetic field disturbance caused by heating current.Experimental results show that the non-magnetic temperature control system has a four-hour temperature stability of 0.004 ℃ when the working temperature of the atomic gas chamber is 80 ℃,and the magnetic field noise is less than 100 nT,which meets the design requirements of the warm atomic optical clock and ensures the smooth progress of the warm atomic optical clock experiment.
关键词
无磁加热/原子气室/热原子光钟/高精度温控/稳定性
Key words
non-magnetic heating/atomic gas chamber/warm atomic light clock/high precision temperature control/stability
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