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回顾了NIM4 #钟实现 5 μK冷原子云 ,74cm原子喷泉和 0 95Hz线宽Ramsey跃迁实验 ,报道了 9 19GHz微波锁定到铯原子秒定义跃迁 ,频率稳定性达到 (5 - 7)× 10 -15(15 0 0 0s)。目前我们正在进行不确定度评估 ,可望不确定度进入 10 -15量级 ,建立我国新一代时间频率基准装置。
The NIM4 # clock is used to realize 5 μK cold atomic cloud, 74 cm atomic fountain and Ramsey transition at 0 95 Hz, and the 9 19GHz microwave locked-to-cesium second-order defined transition is reported with a frequency stability of (5 - 7) × 10 -15 (15 0 0 0s). Currently, we are carrying out the evaluation of uncertainty and expecting the uncertainty to enter the 10-15 order of magnitude to establish a new generation of time and frequency reference devices in our country.