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Search Publications

NIST Authors in Bold

Displaying 326 - 350 of 2538

Measuring the Ion Current in High-Density Plasmas Using Radio-Frequency Current and Voltage Measurements

September 1, 2001
Author(s)
Mark A. Sobolewski
… methods have recently been proposed for monitoring the ion current in situ. These methods rely on passive, … by comparison to direct, independent measurements of the ion current at the substrate electrode made using lower … more accurate numerical sheath model, gives values of the ion current in agreement with the independent measurements. …

A transition-edge sensor-based x-ray spectrometer for the study of highly charged ions at the National Institute of Standards and Technology electron beam ion trap

December 16, 2019
Author(s)
Paul Szypryt, Galen C. O'Neil, Endre Takacs, Joseph N. Tan, Sean W. Buechele, Aung Naing, Douglas A. Bennett, William B. Doriese, Malcolm S. Durkin, Joseph W. Fowler, Johnathon D. Gard, Gene C. Hilton, Kelsey M. Morgan, Carl D. Reintsema, Daniel R. Schmidt, Daniel S. Swetz, Joel N. Ullom, Yuri Ralchenko
… Sensor (TES) x-ray spectrometer for the Electron Beam Ion Trap (EBIT) at the National Institute of Standards and … NIST EBIT has produced numerous studies of highly charged ions in diverse fields such as atomic physics, plasma … Institute of Standards and Technology, highly charged ions, atomic physics, plasma spectroscopy, laboratory …

High Precision Measurements of Arsenic Implantation Dose in Silicon by Secondary Ion Mass Spectrometry

February 1, 2001
Author(s)
P Chi, David S. Simons, J M. McKinley, F A. Stevie, C N. Granger
… to be accomplished with low systematic error. Secondary ion mass spectrometry (SIMS) has a demonstrated capability to … investigated include arsenic analytical species, matrix ion species, energy bandpass, and sample holder design. With … profile, energy distribution, high precision measurement, ion implantation, SIMS …

ELSEPA - Dirac Partial-Wave Calculation of Elastic Scattering of Electrons and Positrons by Atoms, Positive Ions and Molecules

January 1, 2005
Author(s)
Francesc Salvat, Aleksander Jablonski, Cedric J. Powell
… scattering of electrons and positrons by atoms, postive ions and molecules is presented. These codes perform … a local central interaction potential V (r). For atoms and ions, the static-field approximation is adopted, with the … atoms, elastic scattering, electrons, molecules, positive ions, positrons …

High Quality Oxide Films Deposited at Room Temperature by Ion Beam Sputtering

February 5, 2018
Author(s)
Gerard E. Henein, Juraj Topolancik, Kerry NMN Siebein
… SiO2, Al2O3 and ITO have been deposited via ion beam sputtering at room temperature. The SiO2 films, 100 … Ion beam sputtering, resistivity, breakdown, SiO2, Al2O3, ITO … High Quality Oxide Films Deposited at Room Temperature by Ion Beam Sputtering …

Formation of SEI on Cycled Lithium-Ion Battery Cathodes: Soft X-ray Absorption Study

January 1, 2002
Author(s)
Mahalingam Balasubramanian, H S. Lee, X Sun, Xiao-Qing Yang, A R. Moodenbaugh, James McBreen, Daniel A. Fischer, Ziwen Fu
… (SEI) on LiNi 0.85 Co 0.15 O 2 cathodes from lithium-ion cells cycled at 40EC and 70EC was observed and … battery, electrolyte, lithium-ion, soft x-ray … Formation of SEI on Cycled Lithium-Ion Battery Cathodes: Soft X-ray Absorption Study …

Mobilities: Small Systems

October 12, 2021
Author(s)
J Husband, S R. Leone
… gas. From these studies much has been learned about the ion-neutral interaction potential. Knowledge of how an ion travels through a neutral gas is crucial to the … are essential for accurate modeling of the kinetics of ion-molecule reactions. Such reactions play a major role in …

Hyperfine-mediated electric quadrupole shifts in Al+ and In+ ion clocks

April 6, 2017
Author(s)
Kyle P. Beloy, David R. Leibrandt, Wayne M. Itano
… the averaging schemes that are critical to other optical ion clocks. … aluminum, electric quadrupole moment, indium, ion clock, optical clock, optical frequency standard … electric quadrupole shifts in Al+ and In+ ion clocks …

EUV Spectral Lines of Highly-Charged Hf, Ta and Au Ions Observed with an Electron Beam Ion Trap

January 12, 2011
Author(s)
Ilija Draganic, Yuri Ralchenko, Joseph Reader, John D. Gillaspy, Joseph N. Tan, Joshua M. Pomeroy, Samuel M. Brewer, Dmitry D. Osin
… tantalum, and gold were produced with an electron beam ion trap (EBIT) at the National Institute of Standards and … modeling, line identification, highly-charged ions … EUV Spectral Lines of Highly-Charged Hf, Ta and Au Ions Observed with an Electron Beam Ion Trap …

Effect of a Water Rinse on Labile Fluoride and Ether Ions in Plaque and Saliva Before and After Conventional and Experimental Fluoride Rinses

March 1, 2001
Author(s)
Gerald L. Vogel, Z Zhang, Laurence C. Chow, Gary E. Schumacher
… apparently due to water induced loss of calcium binding ions. Water- or fluoride-rinse-induced changes in plaque … caries, fluoride, labile ions, plaque, saliva … Effect of a Water Rinse on Labile Fluoride and Ether Ions in Plaque and Saliva Before and After Conventional and …

Direct Imaging of Highly Charged Ions in an Electron Beam Ion Trap

August 1, 2000
Author(s)
James V. Porto, I Kink, John D. Gillaspy
… We have directly observed the ion cloud distribution in an electron beam ion trap using … lines in the ground term of Ar 13+ ,^ Xe 31+ and Xe 32+ ions. Using a gated intensified charge coupled device camera, … provide infromation about the trapped highly charged ions which is difficult to obtain by other methods. To …

First principle simulation of ultra-cold ion crystals in a Penning trap with Doppler cooling and a rotating wall potential

July 17, 2019
Author(s)
Chen Tang, Dominic Meiser, John Bollinger, Scott E. Parker
… in a Penning trap with a rotating wall is presented. The ion dynamics is modelled classically. Both axial and planar … non-neutral plasma, Penning trap, rotating wall, trapped-ion crystals … First principle simulation of ultra-cold ion crystals in a Penning trap with Doppler cooling and a …

Versatile laser-free trapped-ion entangling gates

March 28, 2019
Author(s)
R. T. Sutherland, Raghavendra Srinivas, Shaun C. Burd, Dietrich Leibfried, Andrew C. Wilson, David J. Wineland, David T. Allcock, Daniel Slichter, S. B. Libby
… theory for laser-free entangling gates with trapped-ion hyperfine qubits, using either static or oscillating … Versatile laser-free trapped-ion entangling gates …

Genetically Engineered Metal Ion Binding Sites on the Outside of a Channel's Transmembrane B-Barrel

February 1, 1999
Author(s)
John J. Kasianowicz, D L. Burden, L C. Han, S Cheley, H Bayley
… engineered versions of the Staphlococcus aureus αHL} ion channel to serve as rationally designed sensor components … alpha-hemolysin, alpha-toxin, biosensor, divalent cations, ion channels, protein structure, transition metals … Genetically Engineered Metal Ion Binding Sites on the Outside of a Channel's Transmembrane …

K X-Rays Produced in Collisions of Bare Ions With Atoms Contribution of Multiple-Electron Transfer in Kr 36+ , Ar 18+ , and Ne 10+ + Ar Collisions

January 1, 2006
Author(s)
H Tawara, E Takacs, T Suta, K Makonyi, L P. Ratliff, John D. Gillaspy
… observed in low energy collisions of bare Kr, Ar, and Ne ions ion with neutral gas targets. Although largely … collisions, highly charged ions, hyper-satellite lines, satellite lines, x-ray … K X-Rays Produced in Collisions of Bare Ions With Atoms Contribution of Multiple-Electron Transfer in …

Identification of Active Sites of Biomolecules II: Saccharide and Transition Metal ion in Aqueous Solution

February 23, 2009
Author(s)
Orkid Coskuner, Denis E. Bergeron, Luis C. Rincon, Jeffrey W. Hudgens, Carlos A. Gonzalez
… dynamics (CPMD) simulations find that a single FeIII ion interacts with specific hydroxyl groups of the saccharide … in aqueous solution. Specifically, we find that one FeIII ion complexed to methyl-a-mannopyranoside also associates … ionization mass spectrometry measurements involving guided ion beam hydration measurements, which reveal an optimal …
Displaying 326 - 350 of 2538
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