102 citations · 407 across the 12 of their papers we have counts for
12 papers
High-accuracy optical clocks based on group 16-like highly charged ions
Saleh O. Allehabi, S. M. Brewer, V. A. Dzuba +2
We identify laser-accessible transitions in group 16-like highly charged ions as candidates for high-accuracy optical clocks, including S-, Se-, and Te-like systems. For this class…
Radium Ion Optical Clock
C. A. Holliman, M. Fan, A. Contractor +2
We report the first operation of a Ra optical clock, a promising high-performance clock candidate. The clock uses a single trapped Ra ion and operates on the $7…
Optical Atomic Clock Comparison through Turbulent Air
Martha I. Bodine, Jean-Daniel Deschênes, Isaac H. Khader +32
We use frequency comb-based optical two-way time-frequency transfer (O-TWTFT) to measure the optical frequency ratio of state-of-the-art ytterbium and strontium optical atomic cloc…
Frequency Ratio Measurements with 18-digit Accuracy Using a Network of Optical Clocks
Boulder Atomic Clock Optical Network, Collaboration, : +35
Atomic clocks occupy a unique position in measurement science, exhibiting higher accuracy than any other measurement standard and underpinning six out of seven base units in the SI…
Measurements of Al and Mg magnetic constants for improved ion clock accuracy
S. M. Brewer, J. -S. Chen, K. Beloy +14
We have measured the quadratic Zeeman coefficient for the optical clock transition in Al, ~MHz/T, an…
Systematic uncertainty due to background-gas collisions in trapped-ion optical clocks
A. M. Hankin, E. R. Clements, Y. Huang +5
We describe a framework for calculating the frequency shift and uncertainty of trapped-ion optical atomic clocks caused by background-gas collisions, and apply this framework to an…
Sympathetic ground state cooling and time-dilation shifts in an optical clock
J. -S. Chen, S. M. Brewer, C. W. Chou +3
We report on Raman sideband cooling of to sympathetically cool the secular modes of motion in a - two-ion pair to near th…
Measurement of the Kr XVIII 3d lifetime at low energy in a unitary Penning trap
Nicholas D. Guise, Joseph N. Tan, Samuel M. Brewer +2
A different technique is used to study the radiative decay of a metastable state in multiply ionized atoms. With use of a unitary Penning trap to selectively capture Kr ion…
Capture and isolation of highly-charged ions in a unitary Penning trap
Samuel M Brewer, Nicholas D Guise, Joseph N Tan
We recently used a compact Penning trap to capture and isolate highly-charged ions extracted from an electron beam ion trap (EBIT) at the National Institute of Standards and Techno…
Quantum interference and light polarization effects in unresolvable atomic lines: application to a precise measurement of the 6,7 Li D2 lines
Roger C. Brown, Saijun Wu, J. V. Porto +5
We characterize the effect of quantum interference on the line shapes and measured line positions in atomic spectra. These effects, which occur when the excited state splittings ar…
Highly Charged Ions in Rare Earth Permanent Magnet Penning Traps
Nicholas D. Guise, Samuel M. Brewer, Joseph N. Tan
A newly constructed apparatus at the National Institute of Standards and Technology (NIST) is designed for the isolation, manipulation, and study of highly charged ions. Highly cha…
Penning traps with unitary architecture for storage of highly charged ions
Joseph N. Tan, Samuel M. Brewer, Nicholas D. Guise
Penning traps are made extremely compact by embedding rare-earth permanent magnets in the electrode structure. Axially-oriented NdFeB magnets are used in unitary architectures that…