Preliminary Frequency Comparison of Two 40 Ca + Optical Frequency Standards
作者： Pei-Liang Liu , Yao Huang , Wu Bian , Hu Shao , Yuan Qian
DOI: 10.1088/0256-307X/31/11/113702
关键词: Laser 、 Frequency standard 、 Magnetic field 、 Jitter 、 Compensation (engineering) 、 Physics 、 Ion 、 Optics 、 Ion trap 、 Frequency
摘要: Frequency comparison is one of the most efficient ways to evaluate performance a frequency standard. Based on pre-existing Ca-40(+) optical standard, we set up second which has been improved in materials and structure ion traps for better control magnetic field. After compensation, residual field at position adjusted be similar 500 nT with long time jitter 10 nT, than We realize '4-point-closed-loop locking' standard after series preparatory works. Through half an hour measurement time, two standards exhibited stability 2.1x10(-13)tau(-1/2) relative difference 1.5 (2.9) Hz.
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harvard.edu参考文章(25)
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