Efforts towards a low ‑ temperature ‑ sensitive physics package for vapor cell atomic clocks
Efforts towards a low ‑ temperature ‑ sensitive physics package for vapor cell atomic clocks
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DOI：
10.1186/s43020-020-00017-9
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发表时间：
2020
影响因子：
11.2
通讯作者：
张首刚
中科院分区：
文献类型：
--
作者：
郝强;薛文祥;许风;王柯穆;云恩学;张首刚
Strong environmental dependence is an intractable problem for vapor cell clocks, for which the high-temperature sensitivity of the physics package is considered one of the dominant reasons. In this paper, we report the design and realization of a low-temperature-sensitive physics package for vapor cell clocks. The physics package comprises three layers of magnetic shields, three layers of heating ovens, and the cavity-cell assembly. The cavity-cell assembly employs a compact magnetron-type cavity and a Rb vapor cell sealed with N2-Ar mixed buffer gas. The dependence ture, a three-stage temperature regulator is implemented on the physics package. It adopts a combination of open of the clock frequency on temperature fluctuation is evaluated to be 2 × 10−11/°C. In pursuit of the stable tempera- andclosed-loop control to address the problem of significant thermal coupling between the heating ovens. Under a laboratory environment, the measured Hadamard deviation of the temperature variation is 4 × 10−5 °C in 1 day of averaging.
