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Search Publications

NIST Authors in Bold

Displaying 526 - 550 of 3841

Coherent coupling and non-destructive measurement of trapped-ion mechanical oscillators

July 29, 2024
Author(s)
Panyu Hou, Jenny Wu, Stephen Erickson, Daniel Cole, Giorgio Zarantonello, Adam Brandt, Andrew C. Wilson, Daniel Slichter, Dietrich Leibfried
… spectrally separated harmonic motional modes of a trapped-ion crystal. The timing, strength, and phase of the coupling … non-destructive projective measurement of a trapped-ion motional state. Our work enhances the suitability of trapped-ion motion for continuous-variable quantum computing and …

Development of Certified Reference Materials of Ion-Implanted Dopants in Silicon for Calibration of Secondary Ion Mass Spectrometers

January 1, 2007
Author(s)
David S. Simons, Robert G. Downing, George P. Lamaze, Richard M. Lindstrom, Robert R. Greenberg, Rick L. Paul, Susannah Schiller, William F. Guthrie
… dopant species that is introduced into a silicon wafer by ion implantation. The certified dose (atoms/cm2) of the … of dopant concentration measurements with secondary ion mass spectrometers. Certification measurements were … arsenic, boron, CRM, ion implantation, neutron activation analysis, phosphorus, …

Effect of Chlorine and Chromium on Sulfur Solubility in Low-Activity Waste Glass

September 21, 2021
Author(s)
Tongan Jin, Eden Rivers, Dongsang Kim, Timothy Droubay, Evan Jahrman, Derek Mar, Brigitte Weese, Gerald Seidler, Albert Kruger
… saturated by sodium sulfate, sodium chloride, and sodium chromate salts as single components and as mixtures with … 50 mol%, and 75 mol% of sulfate mixed with chloride or chromate. A crucible-scale salt-saturation was performed to … inductively coupled plasma–atomic emission spectroscopy, ion chromatography, and X-ray emission spectroscopy. The …

Spectroscopy of atomic and molecular ions using quantum logic

June 25, 2006
Author(s)
Piet Schmidt, Till P. Rosenband, Jeroen Koelemeij, David Hume, Wayne M. Itano, James C. Bergquist, David J. Wineland
… developed techniques for quantum computation using trapped ions allow unprecedented coherent control of the internal and … to perform precision spectroscopy of atomic and molecular ions that have no accessible transition for laser cooling and … quantum superpositions, quantum-state engineering, trapped ions. …

High-accuracy optical clocks based on group 16-like highly charged ions

October 3, 2022
Author(s)
Saleh Allehabi, Samuel Brewer, Vladimir Dzuba, Victor Flambaum, Kyle Beloy
… 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 of ions, the ground 3PJ fi ne structure manifold exhibits … properties important for optical clock development. All ions discussed are suitable for production in small-scale ion …

An Intense Slit Discharge Source of Jet-Cooled Molecular Ions and Radicals (T rot 30K)

July 1, 1996
Author(s)
D T. Anderson, S Davis, Timothy Zwier, David Nesbitt
… densities of radicals (> 10 12 /cm 3 ) and molecular ions (> 10 10 /cm 3 ), under long absoption path (80cm), … discharge, infrared, jet-cooled, molecular ions, radicals … An Intense Slit Discharge Source of Jet-Cooled Molecular Ions and Radicals (T rot 30K) …

Near-Horizontal Two-Phase Flow Patterns of Nitrogen and Hydrogen at Low Mass and Heat Flux

December 1, 2001
Author(s)
N T. Van Dresar, James D. Siegwarth
… rates (0.2 - 20 g/s for nitrogen; 0.02 to 0.02 g/s for hydrogen), heat flux (0.07W/cm 2 ), and flow-path size (8.7- … with liquid nitrogen and a lesser number with liquid hydrogen. Viewports in the apparatus permitted the visual … cryogenic, flow patterns, liquid hydrogen, two-phase …

EUV magnetic-dipole lines from highly-charged high-Z ions with an open $3d$ shell

November 27, 2012
Author(s)
Yuri Ralchenko, John D. Gillaspy, Joseph Reader, Dmitry D. Osin
… and Technology was used to produce highly-charged ions of hafnium, tantalum and gold with an open $3d$ shell. The extreme-ultraviolet (EUV) spectra from these ions were recorded with a flat-field grazing-incidence … $3d^n$ configurations of the Co-like to K-like ions, were identified by comparing energy-dependent …

Accurate Modeling of Benchmark X-ray Spectra from Highly-Charged Ions of Tungsten

October 26, 2006
Author(s)
Y Ralchenko, Joseph N. Tan, John D. Gillaspy, Joshua M. Pomeroy, E Silver
… the benchmark x-ray spectrum of highly-charged tungsten ions in the range between 3 \AA \ and 10 \AA produced in an … spectral lines from Cu-like W$^45+}$ and Ni-like W$^46+}$ ions, led to the re-interpretation of a previously … modeling, high multipoles, highly-charged ions, radiative transitions, tungsten …

Modeling near ground-state cooling of two-dimensional ion crystals in a Penning trap using electromagnetically induced transparency

February 7, 2019
Author(s)
Athreya Shankar, Elena Jordan, Kevin Gilmore, Arghavan Safavi-Naini, John J. Bollinger, Murray Holland
… motional drumhead modes, transverse to the plane of the ion crystal, degrade the quality of quantum simulations. … investigate the efficiency of EIT cooling of planar ion crystals in a Penning trap, accounting for complications … Modeling near ground-state cooling of two-dimensional ion crystals in a Penning trap using electromagnetically …

Single molecule measurements within individual membrane-bound ion channels using a polymer-based bilayer lipid membrane chip

February 29, 2008
Author(s)
Louis P. Hromada, Brian J. Nablo, Michael Gaitan, John J. Kasianowicz, Don DeVoe
… A polymer microfluidic platform for electrophysiological ion channel measurements is presented. The system includes an … measurements, and multiple microchannels for independent ion channel and analyte delivery. Details of chip … bilayer membrane formation, and alpha-hemolysin ion channel incorporation are discussed. Using this …

Trapped atomic ions and quantum information processing

July 16, 2006
Author(s)
David J. Wineland, Dietrich G. Leibfried, James C. Bergquist, Brad R. Blakestad, John J. Bollinger, Joseph W. Britton, J Chiaverini, Ryan Epstein, David Hume, Wayne M. Itano, John D. Jost, Emanuel H. Knill, Jeroen Koelemeij, C. Langer, R Ozeri, Rainer Reichle, Till P. Rosenband, Tobias Schaetz, Piet Schmidt, Signe Seidelin, Nobuyasu Shiga, Janus Wesenberg
… been demonstrated in separate experiments on trapped ions. Construction of a large-scale information processor … information processing, quantum-state engineering, trapped ions … Trapped atomic ions and quantum information processing …

Energy dissipation of highly charged ions on Al oxide films

March 3, 2010
Author(s)
Joshua M. Pomeroy, Russell Lake, C E. Sosolik
… Slow highly charged ions carry a large amount of potential energy that can be … desorption. Our approach is to extract highly charged ions onto the Al oxide barriers of metal-insulator-metal … highly charged ions, potential energy, tunnel junctions … Energy dissipation of highly charged ions on Al oxide films …

Rotating-radio-frequency ion traps

October 20, 2005
Author(s)
T Hasegawa, John J. Bollinger
… We propose a new ion trap, the rotating-rf trap, in which motion of a charged … in a normal rf trap, an oscillating quadrupole field does. Ion motion in a rotating-rf trap is a superposition of two … ion traps, mass spectroscopy, Mathieu functions, micromotion, … Rotating-radio-frequency ion traps …

Extreme Ultraviolet Spectra of Highly Charged Xenon Observed with an Electron Beam Ion Trap

November 23, 2012
Author(s)
Dmitry D. Osin, Joseph Reader, John D. Gillaspy, Yuri Ralchenko
… charged xenon atoms were produced with an electron beam ion trap (EBIT) at the National Institute of Standards and … within the 3s23p2 ground configuration of the Si-like ion. A list of adopted wavelengths used as calibration … charged ions, fusion diagnostics, xenon, Xe, electron beam ion trap, EBIT …

Hydrogen cyanide H 13 C 14 N absorption reference for 1530 nm to 1565 nm wavelength calibration - SRM 2519a

August 1, 2005
Author(s)
Sarah L. Gilbert, William C. Swann, C. M. Wang
… reference based on the fundamental absorption lines of hydrogen cyanide H 13 C 14 N in the 1530 nm to 1565 nm … predecessor, SRM 2519, is the use of lower pressure in the hydrogen cyanide cell to produce narrower lines. Thus SRM … of 54 lines of the 2Ņ3 rotational-vibrational band of hydrogen cyanide H 13 C 14 N are certified with uncertainties …

A Rod-Packing Hydrogen-Bonded Organic Framework with Suitable Pore Confinement for Benchmark Ethane/Ethylene Separation

April 26, 2021
Author(s)
Xu Zhang, Jia-Xin Wang, Libo Li, Jiyan Pei, Rajamani Krishna, Hui Wu, Wei Zhou, Guodong Qian, Bin Li, Banglin Chen
… report a reversible solid-state transformation in a labile hydrogen-bonded organic framework to generate a new … Porous material, Hydrogen bonding, Gas separation … A Rod-Packing Hydrogen-Bonded Organic Framework with Suitable Pore …

Near ground-state cooling of two-dimensional trapped-ion crystals with more than 100 ions

February 7, 2019
Author(s)
Judith Elena Jordan, Kevin A. Gilmore, Athreya Shankar, Arghavan Safari-Naini, Justin G. Bohnet, Murray Holland, John J. Bollinger
… modes of 2-dimensional arrays with up to N 190 Be+ ions stored in a Penning trap. Substantial sub-Doppler … EIT cooling, Penning traps, sub-Doppler cooling, trapped ions … Near ground-state cooling of two-dimensional trapped-ion crystals with more than 100 ions …

High-Stability Single-Ion Clock with 5.5 x 10^-19 Systematic Uncertainty

July 14, 2025
Author(s)
Mason Marshall, Daniel Rodriguez Castillo, Willa Dworschack, Alexander Aeppli, Kyungtae Kim, Dahyeon Lee, William Warfield, Nicholas Nardelli, Tara Fortier, Jun Ye, David Ray Leibrandt, David Hume
… We report a single-ion optical atomic clock with fractional frequency … based on quantum logic spectroscopy of a single 27Al+ ion. A co-trapped 25Mg+ ion provides sympathetic cooling and quantum logic readout of … High-Stability Single-Ion Clock with 5.5 x 10^-19 Systematic Uncertainty …

Penning traps with unitary architecture for storage of highly charged ions

February 15, 2012
Author(s)
Joseph N. Tan, Samuel M. Brewer, Nicholas D. Guise
… beam-line available for extracting highly charged ions. We present a two-magnet architecture with radial access … as well as the collection of light emission by stored ions. Highly charged ions of neon and argon, extracted with initial energies 4000 … with unitary architecture for storage of highly charged ions …
Displaying 526 - 550 of 3841
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