关键词: 汞离子微波频标, 汞灯, 缓冲气体, 光抽运

Abstract: 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 194nm and unwanted background light at 254nm(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.

Key words: Mercury ion trapped microwave frequency standard, Mercury lamp, Buffer gas, Optical pumping