Magnetic shield integration for a chip-scale atomic clock

被引：3

作者：

Hong H.-G. ^{[1
]}

Park J. ^{[2
]}

Kim T.H. ^{[2
]}

Kim H.Y. ^{[2
]}

Park S.E. ^{[1
]}

Lee S.-B. ^{[1
]}

Heo M.-S. ^{[1
]}

Kwon T.Y. ^{[1
]}

机构：

[1] Time and Frequency Group, Korea Research Institute of Standards and Science, Daejeon

[2] Department of Convergence Sensor, National NanoFab Center, Daejeon

来源：

Applied Physics Express | 2020年 / 13卷 / 10期

关键词：

Atomic clocks;

D O I：

10.35848/1882-0786/abb642

中图分类号：

学科分类号：

摘要：

We introduce a miniaturized magnetic shield integrated into the physics package of a chip-scale atomic clock. The primary shield, which is formed by a stack of precision-machined high-permeability plates, compactly sits inside the package as it is designed to be the internal supporting frame. Further improved by a Kovar lid, the best frequency sensitivity to a longitudinal external field is 1.1(3) × 10−11/μT, which is consistent with the measured shielding factor, while the transverse sensitivity is well below 10−12/μT. The sealed unit on a chip carrier alone allows stable clock operation with a frequency instability of 4.8(2) × 10−12 at 1000 s. © 2020 The Japan Society of Applied Physics

引用

共 31 条

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