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Search Publications

NIST Authors in Bold

Displaying 76 - 100 of 2537

In Situ Imaging of Highly Charged Ion Irradiated Mica

January 1, 2001
Author(s)
L P. Ratliff, John D. Gillaspy
… surfaces due to the impact of Xe44+ ions by imaging the ion-exposed surfaces with atomic force microscopy in vacuum. … AFM, highly charged ion, mica … In Situ Imaging of Highly Charged Ion Irradiated Mica …

Trapped Ions, Entanglement, and Quantum Computing

May 1, 1998
Author(s)
C J. Myatt, B E. King, D Kielpinski, Dietrich Leibfried, C S. Turchette, Chris S. Wood, Wayne M. Itano, C Monroe, David J. Wineland
… range of 5-20 MHz. The equilibrium positions of pairs of ions that are crystallized in this trap lie along the long … potential to the trap, the micromotion of two crystallized ions may by reduced relative to the case of pure rf … a scheme to use this effect to differentially address the ions. …

Studies of Ion Bombardment in High Density Plasmas Containing CF 4

July 1, 1999
Author(s)
James K. Olthoff, Yicheng Wang
… We report ion energy distributions, relative ion intensities, and absolute total ion current densities at the grounded electrode of an … plasmas, etching plasmas, inductively coupled plasmas, ion energy distributions, ion flux … Studies of Ion Bombardment in High Density Plasmas Containing CF 4 …

Direct-write Lithiation of Silicon Using a Focused Ion Beam of Li+

July 8, 2019
Author(s)
William R. McGehee, Evgheni Strelcov, Vladimir P. Oleshko, Christopher L. Soles, Nikolai B. Zhitenev, Jabez J. McClelland
… processes that govern the performance of lithium ion batteries involve numerous parallel reactions and … of these systems. As a new way to study the behavior of ion transport and reaction in these applications, we report the use of a focused ion beam of Li+ to locally insert controlled quantities of …

Transport dynamics in a high-brightness magneto-optical-trap Li ion source

September 15, 2020
Author(s)
Jamie Gardner, William R. McGehee, Mark D. Stiles, Jabez J. McClelland
… methods for generating high brightness ions for focused ion beam applications. These sources produce ions by … results in a very low emittance, high-brightness ion beam. In a magneto- optical-trap-based ion source, the brightness is ultimately limited by the … MOTIS, cold atom ion source, MOT dynamics, magneto-optical trap, focused ion …

Surface Analysis Studies of Yield Enhancements in Secondary Ion Mass Spectrometry by Polyatomic Projectiles

May 1, 2001
Author(s)
E Fuoco, J Greg Gillen, M Wijesundara, William E. Wallace, L Hanley
… In this paper examine the mechanism of secondary ion yield enhancements previously observed for polyatomic … profilometry. Thus, the > 10x enhancement in secondary ion yield in secondary ion mass spectrometry observed for polyatomic ion projectiles … cluster bombardment, polyatomic ion bombardment, secondary ion mass spectrometry, sputter …

Bilayer crystals of trapped ions for quantum information processing

August 16, 2024
Author(s)
Samarth Hawalder, Prakriti Shahi, Allison Carter, Ana Rey Ayala, John J. Bollinger, Athreya Shankar
… remarkably clean bilayer crystals, wherein hundreds of ions self-organize into two well-defined layers. These … experiments with multilayer 3D crystals of trapped ions. … Bilayer crystals of trapped ions for quantum information processing …

Transition Energies of the D-lines in Na-like Ions

June 5, 2013
Author(s)
John D. Gillaspy, Dmitry D. Osin, Yuri Ralchenko, Joseph Reader, S A. Blundell
… the D1 (3s-3p1/2) and D2 (3s-3p3/2) transitions in Na-like ions of xenon, barium, samarium, gadolinium, dysprosium, … that we are aware of for QED in highly charged Na-like ions. It is also sensitive to retardation effects due to the … atomic spectroscopy, highly charged ions, quantum electrodynamics, electron beam ion trap …

Experiment at NIST towards one-electron ions in circular Rydberg states

June 20, 2011
Author(s)
Joseph N. Tan, Samuel M. Brewer, Nicholas D. Guise
… at NIST to enable tests of theory with oneelectron ions synthesized in circular Rydberg states from captured … highly charged ions, ion trapping, hydrogen-like ions, fundamental constants, Rydberg states … Experiment at NIST towards one-electron ions in circular Rydberg states …

Reversible Room-Temperature Fluoride-Ion Insertion in a Tunnel-Structured Transition Metal Oxide Host

July 6, 2020
Author(s)
Cherno Jaye, Wasif Zaheer, Justin L. Andrews, Forrest P. Hyler, Conan Weiland, David A. Shapiro, Jinghua Guo, Jesus M. Velazquez, Sarbajit Banerjee, Abhishek Parija, Daniel Fischer
… An energy storage paradigm orthogonal to conventional Li-ion battery chemistries can be conceptualized by employing anions as the primary charge carriers. F-ion conversion chemistries show promise but have limited … must further operate at elevated temperatures to achieve F-ion diffusion. In contrast, the exploration of intercalation …

Exposure of Self-Assembled Monolayers to Highly Charged Ions and Metastable Ions

July 1, 1999
Author(s)
L P. Ratliff, Ronaldo Minniti, A Bard, E W. Bell, John D. Gillaspy, D Parks, A J. Black, G M. Whitesides
… metastable argon atoms (Ar*) and highly charged xenon ions (HCIs) required to damage self-assembled monolayers … dose, highly charged ions, metastable ions, patterning, self-assembled monolayers, surface … Exposure of Self-Assembled Monolayers to Highly Charged Ions and Metastable Ions …

Noninvasive Monitoring of Ion Energy Drift in an Inductively Coupled Plasma Reactor

February 1, 2005
Author(s)
Mark A. Sobolewski
… A non-invasive method for monitoring ion current and ion kinetic energy has been used to monitor drift in an … plasmareactor. The technique detects a slow decrease in ion current over time caused by the deposition of a … electrical measurements, inductively coupled plasma, ion current, ion energy, plasma, process monitoring, …

Analysis of EUV spectra from N-shell tungsten ions observed with an electron beam ion trap

July 3, 2018
Author(s)
Tapasi Das, Yuri Podpaly, Joseph Reader, John D. Gillaspy, Yuri Ralchenko
… Extreme ultraviolet spectra of highly charged tungsten ions were produced with an electron beam ion trap at the National Institute of Standards and … the ionization stages from Zr-like W34+ to Se-like W40+ ions were observed. Large-scale collisional-radiative …

Efficient fiber optic detection of trapped ion flourescence

July 9, 2010
Author(s)
Aaron Vandevender, Yves Colombe, Jason Amini, Dietrich G. Leibfried, David J. Wineland
… integrated optical fiber for detecting fluorescence. The ion can be positioned between 80 and 100 υm from the tip of … ion traps, optical fibers, quantum information … Efficient fiber optic detection of trapped ion flourescence …

Low Jitter Metal Vapor Vacuum Arc Ion Source for EBIT Injections

June 27, 2005
Author(s)
G Holland, Craig N. Boyer, J Seely, Joseph N. Tan, Joshua M. Pomeroy, John D. Gillaspy
… A metal vapor vacuum arc (MeVVA) ion source having eight different cathodes that are … vacuum head assembly. The over-damped pulse produces an ion flux of 8.4x109 ions/cm2, during a single discharge … Institute of Standards and Technology (NIST) Electron Beam Ion Trap (EBIT), are presented. …

Measured cross sections and ion energies for a CHF 3 discharge.

August 1, 2002
Author(s)
B. Peko, R. Champion, MVVS. Rao, James K. Olthoff
… silicon substrate. Such surface etching is governed by the ion and molecule fluxes near the surface, the concentrations … the plasma. In order to assist in the interpretation of ion flux measurements and to provide fundamental data … we report the first total cross sections for significant ion-molecular reactions occurring in CHF 3 discharges. The …

Recent Advances in Focused Ion Beam Technology and Applications

April 11, 2014
Author(s)
Nabil Bassim, Keana Scott, Lucille A. Giannuzzi
… Focused ion beam (FIB) microscopes are extremely versatile and … systems. The advent of novel instrumentation such as new ion sources which encompass more and more of the periodic … detector configurations for 3D structural, chemical and ion contrast characterization, and robust and versatile …

Quantum information processing with trapped ions,

January 1, 2003
Author(s)
David J. Wineland, Murray D. Barrett, Joseph W. Britton, J Chiaverini, B. L. DeMarco, Wayne M. Itano, Branislav M. Jelenkovic, Christopher Langer, Dietrich G. Leibfried, Till P. Rosenband, T Schaetz
… development of a quantum computer based on trapped atomic ions are described briefly. We discuss the implementation of … quantum computation, entanglement, trapped atomic ions … Quantum information processing with trapped ions, …

Laser Cooled Atoms as a Focused Ion Beam Source

December 21, 2006
Author(s)
James L. Hanssen, Jabez J. McClelland, E Dakin, M Jacka
… We describe a method for creating a high quality focused ion beam with enhanced capabilities using an ion source based on laser-cooled neutral atoms in a … and trapped, and will allow unprecedented control over the ion emission, allowing, for example, the production of single …

Preparation of Dicke States in an Ion Chain

November 2, 2009
Author(s)
David Hume, Chin-Wen Chou, Till P. Rosenband, David J. Wineland
… in trapped atomic ions. We consider a linear chain of N ion qubits that is prepared in a particular Fock state of … target ions trapped simultaneously with an 27Al+ ancillary ion. … Dicke state, entanglement, laser spectroscopy, ion trap, quantum information … Preparation of Dicke States in an Ion Chain …

Jovian Auroral Ion Precipitation: X-Ray Production from Oxygen and Sulfur Precipitation

December 9, 2019
Author(s)
Heman Gharibnejad, David Schultz, Thomas Cravens, Stephen Houston, W. R. Dunn, D. K. Haggerty, A. M. Rymer, B. H. Mauk, N. Ozak
… made to model X-ray emission from both bremsstrahlung and ion precipitation into Jupiter’s polar caps. Electron … observed by earth-orbit-based X-ray observatories. Heavy ion precipitation was able to reproduce strong X-ray fluxes, but the proposed incident ion energies were very high ($> $1 MeV/nucleon). Now with the …
Displaying 76 - 100 of 2537
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