“921工程”氢脉泽的研究与性能评价

The Study and Performance Evaluation of"921 Project"Hydrogen Maser

氢脉泽是至今为止除极短时间测量间隔之外最稳定的频率标准 ,对于 1 0 4 s或更长的测量时间间隔 ,它的性能由于高 Q值谐振腔而引起频率漂移而变坏 .介绍了上海天文台为“92 1工程”

The hydrogen maser is the most stable frequency standard generally available today for all but the shortest measuring times. For long measuring times of 10 4s or longer, its performance typically deteriorates due to frequency drift of high Q resonant cavity. This paper will describe the performance of '921 project' hydrogen maser with cavity auto tuning.