摘要
汞离子微波频标由于其体积小、指标高的优势,未来将在卫星导航、深空探测和守时中得到广泛应用。汞离子微波频标的优势在于利用汞灯进行抽运,可实现小型化。而汞灯的指标会限制汞离子微波频标的物理极限,因此汞灯的设计尤其重要,通过大量的实验完成了汞灯的设计。测试指标如下,功率稳定度大约2.5%,测试时间为3天;194nm与253nm谱线能量比约1/45,通过滤光泡可改善为1/3。
the mercury ion trapped microwave frequency standard has the potential applications for the future satellite,deep space explorations and time keeping for its great advantages in the total volume and stability.The high frequency spectrum of mercury ion trapped microwave frequency standard is pumped by the mercury lamp which has small volume and long lifetime,as the base of superiority of mercury ion trapped microwave frequency standard.However,the mercury RF discharge lamp used for optical pumping and state detection may limit the ultimate stability performance of the clock.So we have carried out many experiments to enhance the light stability and the ratio of useful light at 194 nm and unwanted background light at 254 nm(194/254).Finally,the stability of light power is about 2.5%in 3 days,the 194/254 ratio is about 1/45,and with filter bulb the ratio is about 1/3.The experimental system of mercury ion trapped microwave frequency standard will be introduced and the Hg lamp device is presented with the radiation regime.
作者
王暖让
陈星
赵环
葛军
WANG Nuan-rang;CHEN Xing;ZHAO Huan;GE Jun(Beijing Institute of Radio Metrology&Measurement,Science and Techuology on Metrology and Calibration laboratory,Beijing 100039,China)
出处
《宇航计测技术》
CSCD
2020年第3期27-30,共4页
Journal of Astronautic Metrology and Measurement
关键词
汞离子微波频标
汞灯
缓冲气体
光抽运
Mercury ion trapped microwave frequency standard
Mercury lamp
Buffer gas
Optical pumping
