| Autor: |
Qiang Hao, Wenxiang Xue, Feng Xu, Kemu Wang, Peter Yun, Shougang Zhang |
| Jazyk: |
angličtina |
| Rok vydání: |
2020 |
| Předmět: |
|
| Zdroj: |
Satellite Navigation, Vol 1, Iss 1, Pp 1-6 (2020) |
| Druh dokumentu: |
article |
| ISSN: |
2662-1363 |
| DOI: |
10.1186/s43020-020-00017-9 |
| Popis: |
Abstract 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 of the clock frequency on temperature fluctuation is evaluated to be 2 × 10−11/°C. In pursuit of the stable temperature, a three-stage temperature regulator is implemented on the physics package. It adopts a combination of open and closed-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. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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