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本刊讯(记者杨学功通讯员卢敬叁)中国首台冷原子喷泉钟时间频率基准NIM4#2003年12月24日在中国计量科学研究院通过专家鉴定。新研制的激光冷却铯原子喷泉钟时间频率基准NIM4#准确度达到了8.5×10-15,相当于350万年不差1秒,具有国际先进水平。这一时间基准的建立,使我国时间频率
Our correspondent (Correspondent Yang Xuegong correspondent Lu Jing San) China’s first cold atomic fountain clock time frequency benchmark NIM4 # December 24, 2003 in China Institute of Metrology passed expert assessment. The newly developed laser cooling cesium atomic fountain clock time frequency reference NIM4 # accuracy reached 8.5 × 10-15, equivalent to 3.5 million years not bad 1 second, with the international advanced level. The establishment of this time base will make our country time and frequency