Suppression of vapor cell temperature error for nuclear magnetic resonance sensor based on Rb parametric magnetometer phase

The nuclear magnetic resonance (NMR) sensor is significant for precise physical measurements. The vapor cell temperature error is an important factor affecting measurement stability. However, the complex principle of the sensor and the difficult measurement phases make it challenging to establish accurate model and suppress the vapor cell temperature error. Therefore, an innovative temperature error suppression method based on the Rb parametric magnetometer (Rb-PM) phase has been proposed. Firstly, the Rb-PM phase was considered in the vapor cell temperature error model. Then, a measurement method for this phase was proposed innovatively based on Xe's amplitude-phase characteristic. Finally, the temperature error has been effectively suppressed by regulating the phase setpoint determined based on the accurate model and phase. Experimental results showed that the temperature sensitivity of the NMR sensor decreased by 44 times. This method has significance for suppressing vapor cell temperature error and enhancing the stability of the NMR sensor.