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Search Publications

NIST Authors in Bold

Displaying 276 - 300 of 3756

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 …

Intermolecular Potential and Second Virial Coefficient of the Water-Hydrogen Complex

January 1, 2004
Author(s)
M P. Hodges, R J. Wheatley, G K. Schenter, Allan H. Harvey
… (5-dimensional) potential-energy surface for the water-hydrogen complex using scaled perturbation theory (SPT). An … are found: the global miniumum has C 2v symmetry, with the hydrogen molecule action as a proton donor to the oxygen atom … aqueous systems, hydrogen, intermolecular potential, second virial …

Mapping Protein-Ligand Interactions with Proteolytic-Digestion, Hydrogen/Deuterium Exchange-Mass Spectrometry

October 23, 2015
Author(s)
Jeffrey W. Hudgens, Elyssia S. Gallagher
… (MS) can measure the change of mass associated with the hydrogen-deuterium exchange (HDX). Protein-ligand interactions reduce or enhance the hydrogen exchange rates of the amide protons, and the … This tutorial outlines the fundamental theory governing hydrogen exchange, provides practical information regarding …

Separation of Inner Shell Vacancy Transfer Mechanisms in Collisions of Slow Ar 17+ Ions with SiO 2

January 1, 2001
Author(s)
E Takacs, Z Ber nyi, John D. Gillaspy, L P. Ratliff, Ronaldo Minniti, J Pedulla, R Deslattes, N Stolterfoht
… the spectrum of x-rays emitted when hydrogen-like argon ions impact silicon dioxide surfaces. Specifically, we were … highly charged ions, surface interactions, vacancy transfer, x-ray … Vacancy Transfer Mechanisms in Collisions of Slow Ar 17+ Ions with SiO 2 …

Hydrogen Cyanide H 13 C 14 N Absorption Reference for 1530 nm to 1560 nm Wavelength Calibration SRM 2519

November 1, 1998
Author(s)
Sarah L. Gilbert, William C. Swann, Chih-Ming Wang
… is an optical-fiber-coubled absorption cell containing hydrogen cyanide (H 13 C 14 N) gas. Hydrogen cyanide has more than 50 accurately measured … absorption cell, hydrogen cyanide (H 13 C 14 N), hydrogen cyanide (H 13 C 14 N) gas, optical-fiber, Standard … Hydrogen Cyanide H 13 C 14 N Absorption Reference for 1530 nm …

Hydrogen Field Test Standard: Laboratory Performance

April 14, 2014
Author(s)
Jodie G. Pope, John D. Wright
… and measures inspectors to periodically test retail hydrogen dispensers, much as gasoline dispensers are tested … hydrogen dispenser, field test … Hydrogen Field Test Standard: Laboratory Performance …

Selective Ethane/Ethylene Separation in a Robust Microporous Hydrogen-Bonded Organic Framework

January 8, 2020
Author(s)
Xu Zhang, Libo Li, Jia-Xin Wang, Hui-Min Wen, Rajamani Krishna, Hui Wu, Wei Zhou, Zhong-Ning Chen, Bin Li, Guodong Qian, Banglin Chen
… efficient C 2 H 6 /C 2 H 4 separation in the emerging hydrogen-bonded organic frameworks (HOFs) due to the weak nature of hydrogen bonds. We herein report the benchmark example of a … Porous materials, Gas separation, Hydrogen bonding … Ethane/Ethylene Separation in a Robust Microporous Hydrogen-Bonded Organic Framework …

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 …

Transport quantum logic gates for trapped ions

September 21, 2007
Author(s)
Dietrich G. Leibfried, Emanuel H. Knill, Christian Ospelkaus, David J. Wineland
… device. In one proposal for large- scale QIP, trapped ions are manipulated by precisely controlled light pulses and … performing single and multiple qubit operations on trapped ions. We show how a universal set of operations can be implemented by controlled transport of ions through stationary laser beams. At the same time, each …

Development of Potential Organic-Molecule-Based Hydrogen Storage Materials: Converting C-N Bond-Breaking Thermolysis of Guanidine to N-H Bond-Breaking Dehydrogenation

September 8, 2016
Author(s)
Xiuquan Zhou, Wei Zhou, Terrence J. Udovic, Taner N. Yildirim, John J. Rush, Efrain E. Rodriguez, Hui Wu
… International Journal of Hydrogen Energy … determination, endothermic dehydrogenation, guanidine, hydrogen storage, metal guanidinates, neutron vibrational … Development of Potential Organic-Molecule-Based Hydrogen Storage Materials: Converting C-N Bond-Breaking …

Preparation and coherent manipulation of pure quantum states of a single molecular ion

May 11, 2017
Author(s)
Chin-Wen Chou, Christoph Kurz, David B. Hume, Philipp N. Plessow, David R. Leibrandt, Dietrich G. Leibfried
… broad range of molecular ions. We trap a single molecular ion in a linear Paul trap together with a single atomic ion. Using two laser beams far off-resonance, we drive Raman … that simultaneously change the state of the molecular ion and excite the shared motion of the two ions in the trap. …

Quantum Entropic Effects in the Liquid Viscosities of Hydrogen, Deuterium, and Neon

July 26, 2023
Author(s)
Ian Bell, Jacob Leachman, Albert Rigosi, Heather Hill
… momentum transfer (shear viscosity) in the fluid phases of hydrogen, deuterium, and neon. We utilize experimental … entropy scaling, cryogens, hydrogen, neon, viscosity … Quantum Entropic Effects in the Liquid Viscosities of Hydrogen, Deuterium, and Neon …

Normal modes of trapped ions in the presence of anharmonic trap potentials

July 19, 2011
Author(s)
Jonathan Home, David Hanneke, John D. Jost, Dietrich Leibfried, David J. Wineland
… in the trapping potential for linear chains of trapped ions. We concentrate on two different effects, which become … a modification of the frequencies and mode vectors of the ions' normal modes of vibration for multi-ion crystals, … Normal modes of trapped ions in the presence of anharmonic trap potentials …

Fast and robust quantum computation with Wigner crystals of ions

April 15, 2011
Author(s)
J D. Baltrusch, A Negretti, T Calarco, Jacob Taylor
… quantum phase gate implemented with Wigner crystals of ions confined in Penning traps. We elaborate on a recent … by two of us, to engineer two-body interactions between ions in such crystals. We analyze for the first time the … Fast and robust quantum computation with Wigner crystals of ions …

Impact Energy Dependence of SF 5 + Ion Beam Damage of Poly(Methyl Methacrylate) Studied by Time-of-Flight Secondary Ion Mass Spectrometry

February 19, 2017
Author(s)
M S. Wagner, J Greg Gillen
… Recent advances in instrumentation for Secondary Ion Mass Spectrometry (SIMS) have focused on the application … polyatomic primary ions for enhancing molecular secondary ion signals of organic materials. A few studies have also … the unusual characteristic of maintaining their molecular ion signals after extended bombardment with polyatomic ion …
Displaying 276 - 300 of 3756
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