Integrated physics package of micromercury trapped ion clock with 10−14-level frequency stability
Abstract
Mercury trapped ion clocks have demonstrated great long-term frequency stability and robustness. In this paper, we report a demonstration of an integrated 100-cc physics package in an effort to develop a micromercury trapped ion clock with high frequency stability. The physics package consists of a sealed 30-cc vacuum tube with one layer of magnetic shielding, light source, and detector assembly. A field emitter array and a 194-nm microplasma lamp were employed together with a microtrap tube to reduce the size and power consumption for a mercury trapped ion clock. We show that the 100-cc physics package is capable of providing a fractional frequency stability of 1×10−11τ−1/2 down to 5×10−14 after a few hours of integration. We also show a set of environmental sensitivity evaluations as well as the clock frequency retrace.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jul 26, 2021
- Source ID
- 10.1063/5.0049734
Entities
People
- C.E. Holland
- J. G. Eden
- John D. Prestage
- Lin Yi
- Nan Yu
- Robert L. Tjoelker
- Sang K. Chung
- Sehyun Park
- Sung-Jin Park
- Thai M. Hoang
- Thanh Le
Organizations
- California Institute of Technology
- Defense Advanced Research Projects Agency
- SRI International
- University of Illinois Urbana–Champaign