论文部分内容阅读
一种实用型氢原子钟已在上海天文台研制成功并投入使用。这篇文章描述它的设计特点,频率稳定度测试以及它的环境性能测试。测试和实用结果表明,在频率稳定度性能以及对磁场、温度和气压灵敏度等环境性能方面较之上海天文台早期实验室型氢原子钟均有根本性的改善。频率稳定度在1秒到10秒之间呈现τ-1特征,σy(τ)=2.2×10-13/τ;10秒到500秒之间呈现τ-1/2特征,σy(τ)=5.5×10-14/τ1/2;而取样时间1000秒左右的最好稳定度在3-5×10-15。测量的温度灵敏度为1-3×10-14/℃;磁场灵敏度为1.1×10-12/G,气压灵敏度为4×10-16/mmHg。
A practical hydrogen atomic clock has been successfully developed in Shanghai Observatory and put into use. This article describes its design features, frequency stability tests, and its environmental performance tests. Tests and practical results show that there is a fundamental improvement in frequency stability performance and environmental performance such as magnetic field, temperature and pressure sensitivity compared with the early laboratory-type hydrogen atomic clocks of the Shanghai Astronomical Observatory. The frequency stability exhibits a τ-1 characteristic between 1 second and 10 seconds, σy (τ) = 2.2 × 10-13 / τ; τ-½ characteristic between 10 seconds and 500 seconds, σy (τ) = 5.5 × 10-14 / τ1 / 2; and the best stability of about 1000 seconds sampling time is 3-5 × 10-15. The measured temperature sensitivity is 1-3 × 10-14 / ° C; the magnetic field sensitivity is 1.1 × 10-12 / G; and the pressure sensitivity is 4 × 10-16 / mmHg.