Cooling and Crystallization of Trapped 113 Cd+ Ions for Atomic Clock
WANG Shi-Guang1,2 , ZHANG Jian-Wei1,3** , MIAO Kai1,3 , WANG Zheng-Bo1,3 , WANG Li-Jun1,2,3**
1 Joint Institute for Measurement Science, Tsinghua University, Beijing 1000842 Department of Physics, Tsinghua University, Beijing 1000843 Department of Precision Instruments and Mechanology, Tsinghua University, Beijing 100084
Abstract ：We report recent experimental progress toward a trapped 113 Cd+ ion microwave frequency standard. With laser cooling, a large number of trapped cadmium ions are cooled to crystallization and the temperature of the ion crystal is measured to be 16 ± 3 mK. The second order Doppler frequency shift, a main limiting factor of the atomic clock's performance, is estimated to be less than 1 × 10?16 .
收稿日期: 2012-10-11
出版日期: 2013-03-04
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2013, Vol. 30 
