Progress Towards a Microwave Atomic Clock Based on the Laser-Cooled Cadmium Ions
作者单位：NIM-THU Joint Institute for Measurement Science(JMI)Tsinghua University Department of Precision Instruments and Mechanology Tsinghua University Department of Physics Tsinghua University
会议名称：《第四届中国卫星导航学术年会》
会议日期：2013年
学科分类：080802[工学-电力系统及其自动化] 0808[工学-电气工程] 08[工学]
关 键 词：Microwave frequency standard Ion trap Cadmium ion Laser cooling
摘 要：In the past decades, many groups in the world were engaged in building the microwave or optical frequency standards based on different trapped ions and achieved great improvements. A project aimed at a microwave atomic clock based on the laser-cooled 113Cd+ ions has been carried out since 2010 in our laboratory. The cadmium ion clock, a transportable clock with excellent frequency stability, is suitable in the comparison between the clocks located in different places, for example, to compare the time systems at different stations of the Compass system, or to examine the general relativity. A linear quadruple ion trap and the technique of laser cooling are applied in this clock. Meanwhile, the cadmium clock can be designed to be transportable which requires only one laser to accomplish the laser cooling, optical pump and optical detection. In this paper, we will report the detailed progress of this clock.