Kenschaft模型参数对铷原子频标长期稳定度的影响

Influences for the long time stability of rubidium frequency standard by parameter of Kenschaft model

对Kenschaft模型的应用进行了扩展,详细阐述了模型参数与铷原子频标长期稳定度之间的内在联系。通过原子吸收线(洛伦兹线形)以及在有正弦调制射频信号的作用下,推导出量子系统的鉴频系数,该系数可以用Kenschaft模型中的参数表示,再将鉴频系数放入到铷原子频标闭环环路方程中,即可确定模型参数对铷频标长期稳定度的影响,最后给出频率稳定度随Kenschaft模型参数变化的仿真结果。

The application of the Kenschaft model is extended thoroughly and the relationship between the parameter of Kenschaft model and long time frequency stability of rubidium frequency standard are explained in detail. Firstly the frequency discrimination parameter of Rubidium Gas Cell is introduced by the parameter of Kenschaft model according to the atomic absorbsion line and RF signal modulated by sine signal. Secondly the frequency discrimination parameter is integrated into the close loop equation of rubidium frequency standard, then how the parameter of Kenschaft model influence the long time stability of rubidium frequency standard is indicated. Finally the simulation results of the long time stability of rubidium frequency standard depending on the parameter of Kenschaft model are presented.