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Search Publications

NIST Authors in Bold

Displaying 226 - 250 of 2537

Electromagnetically-Induced-Transparency Cooling with a Tripod Structure in a Hyperfine Trapped Ion with Mixed-Species Crystals

August 22, 2024
Author(s)
Jenny Wu, Pan-Yu Hou, Stephen Erickson, Adam Brandt, Yong Wan, Giorgio Zarantonello, Daniel Cole, Andrew C. Wilson, Daniel Slichter, Dietrich Leibfried
… of the technique. However, in applications where the ion used for cooling has hyperfine structure to allow long … extra laser frequency; this method can be applied to any ion with non-zero nuclear spin. Furthermore, we demonstrate … and ^9} Be^+ - ^25} Mg^+ - ^9} Be^+ through the ^25} Mg^+ ion. …

Measurement of electric-field noise from interchangeable samples with a trapped-ion sensor

November 18, 2021
Author(s)
Kyle McKay, Dustin Hite, Philip D. Kent, Shlomi S. Kotler, Dietrich Leibfried, Daniel Slichter, Andrew C. Wilson, David P. Pappas
… We demonstrate the use of a single trapped ion as a sensor to probe electric-field noise from … and distance dependence of electric-field noise from two ion-trap-like samples with patterned Au electrodes. This trapped-ion sensor could be combined with other surface …

HCI Reduced Barriers in Magnetic Tunnel Junctions

December 7, 2008
Author(s)
Joshua M. Pomeroy, Holger Grube
… conductance of tunnel junctions due to highly charged ion irradiation was shown while demonstrating that tunnelling … 17th International Workshop on Inelastic Ion-Surface Collisions …

Surface-Electrode Architecture for Ion-Trap Quantum Information Processing

September 1, 2005
Author(s)
J Chiaverini, Brad R. Blakestad, Joseph W. Britton, John D. Jost, C. Langer, Dietrich G. Leibfried, R Ozeri, David J. Wineland
… geometry for miniature linear radio frequency Paul ion traps. The electrodes reside in a single plane on a … principles to the construction of multiplexed ion traps, which may be very desirable for recent proposals … Surface-Electrode Architecture for Ion-Trap Quantum Information Processing …

BLEVE, or no BLEVE, that is the question - On the superheat limits of solvents commonly used in Li-ion batteries

September 26, 2024
Author(s)
Jiann C. Yang
… superheat limits of five solvents commonly used in Li-ion batteries are calculated using the Peng-Robinson equation … occurrence of BLEVE during a thermal runaway of a Li-ion battery. … BLEVE, equation of state, Li-ion battery, superheat limit, thermodynamics … - On the superheat limits of solvents commonly used in Li-ion batteries …

Measuring the effects of low energy ion milling on the magnetization of Co/Pd multilayers using scanning electron microscopy with polarization analysis

April 30, 2010
Author(s)
Benjamin James McMorran, Aaron C. Cochran, Randy K. Dumas, Kai Liu, Paul Morrow, Daniel T. Pierce, John Unguris
… individual layers, Co(0.4nm)/Pd(0.6nm), on the energy of ion milling is investigated using scanning electron … with polarization analysis (SEMPA). The effect of Ar ion milling on the Co/Pd magnetization angle distribution is compared for ion milling at 50 eV, 1 keV, and 2 keV. We find that 1 keV …

A compact, UHV ion source for enriching 28Si and depositing epitaxial thin films

August 22, 2019
Author(s)
Ke Tang, Hyun S. Kim, Aruna N. Ramanayaka, David S. Simons, Joshua M. Pomeroy
… An ultra-high-vacuum (UHV) compatible Penning ion source for growing pure, highly enriched 28Si epitaxial … discuss the discharge properties of this new source, the ion mass spectrum when coupled to our mass filter, and the secondary ion mass spectroscopy (SIMS) of the grown films. …

Electron-Impact Ionization Cross Sections for Polyatomic Molecules, Radicals, and Ions

March 1, 2000
Author(s)
Yong Sik Kim, Karl Irikura
… emphasis on polyatomic molecules and their radicals and ions. The BEB model provides an analytic formula for the … keV in incident electron energy for neutral molecules and ions. The BEB cross sections for some fluorine-containing … electron-impact ionization, ions, polyatomic molecules, radicals …

High Resolution Spectrum of Xenon Ions at 13.4 nm

August 1, 2003
Author(s)
S S. Churilov, Y N. Joshi, Joseph Reader
… The observed transitions were identified as belonging to ions from Xe 8+ to Xe 13+ . In the region of importance for … extreme ultraviolet, ions, microlithography, spectrum, wavelengths, xenon … High Resolution Spectrum of Xenon Ions at 13.4 nm …

Tunable spin-spin interactions and entanglement of ions in separate controlled potential wells

August 7, 2014
Author(s)
Andrew C. Wilson, Yves Colombe, K. R. Brown, Emanuel H. Knill, Dietrich G. Leibfried, David J. Wineland
… of a configurable quantum simulator based on atomic ions. 7 Two ions are trapped in separate potential wells that can … a number of different spin-spin couplings mediated by the ions' Coulomb interaction together with classical laser and … processing, quantum entanglement, trapped atomic ions …

Tools and Procedures for Quantitative Microbeam Isotope Ratio Imaging by Secondary Ion Mass Spectrometry

July 1, 2003
Author(s)
John G. Gillen, David S. Bright
… In this work we demonstrate the use of secondary ion mass spectrometry (SIMS) combined with the Lispix image … Mg isotopic ratios. Using 19.5 keV impact O- primary ion bombardment and detection of positive secondary ions, … isotope ratio, isotope ratio imaging, secondary ion imaging, secondary ion mass spectrometry, surface analysis …

Measuring Ion-Pairing and Hydration in Variable Charge Supramolecular Cages with Microwave Microfluidics

May 17, 2019
Author(s)
Angela C. Stelson, Cynthia M. Hong, Mitchell C. Groenenboom, Charles A. Little, James C. Booth, Nathan D. Orloff, Robert G. Bergman, Kenneth N. Raymond, Kathleen A. Schwarz, F. D. Toste, Christian J. Long
… use microwave microfluidics to measure the hydration and ion pairing properties of two tetrahedral metal–organic cage … broadband measurements, we extract hydration numbers and ion pairing dynamics for the cages. We find that the cage … cage is more strongly hydrated and forms a more solvated ion pair compared to the K12(Ga4L6) cage. We show that …

High resolution X-ray Spectra of the Time Evolution of Emission from Metastable Electronic States of Highly Charged Ni-like Ions

June 25, 2024
Author(s)
Timothy Burke, Endre Takacs, Dipti Dipti, Adam Hosier, Galen O'Neil, Hunter Staiger, Joseph N. Tan, Aung S. Naing, Joan Marler, Yuri Ralchenko
… Metastable levels of highly charged ions that can only decay via highly forbidden transitions can … 1 2 )J=3 magnetic octupole (M3) transition in nickel-like ions can result in a large metastable population of its upper … to study metastable electronic states in highly charged ions (HCIs) that decay by x-ray emission in electron beam ion …

Electrostatic Influence on Ion Transport through the alpha HL Channel

October 1, 2003
Author(s)
M Misakian, John J. Kasianowicz
… The model demonstrates that rectification fo monovalent ion flow through the αHL channel can be related to the … alpha hemolysin, alpha toxin, electrostatics, ion channel, Nernst-Planck analysis … Electrostatic Influence on Ion Transport through the alpha HL Channel …

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

June 1, 2002
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 demonstrated the capability … that were investigated include analytical species, matrix ion species, energy bandpass, and sample holder design. With … energy distribution, high precision measurement, ion implentation, secondary ion mass spectrometry, …

Real-time measurements of plasma photoresist modifications: The role of plasma vacuum ultraviolet radiation and ions

May 23, 2012
Author(s)
Weilnboeck Florian, Nirav Kumar, Gottlieb Oehrlein, Ting-Ying Chung, D Graves, Mingqi Li, Eric A. Hudson, Eric C. Benck
… interactions of surface modifications introduced by ions, bulk material modifications by ultraviolet (UV)/vacuum … work identified the individual contributions of energetic ions and UV/VUV radiation, the dynamics of the concurrent … We studied the interactions of plasma radiation and ions with 193nm PR and 248nm PR in Ar plasma by in-situ …

Surface science motivated by heating of trapped ions from the quantum ground state

October 25, 2021
Author(s)
Dustin Hite, Kyle McKay, David P. Pappas
… past two and a half decades, anomalous heating of trapped ions from nearby electrode surfaces has continued to … Caused by electric-field noise, this heating of the ions' motional modes remains an obstacle for scalable quantum computation with trapped ions. One of the anomalous features of this electric-field …

Trapped electrons and ions as particle detectors

August 5, 2021
Author(s)
Jacob Taylor, Daniel Carney, Hartmut Haffner, David Moore
… Electrons and ions trapped with electromagnetic fields have long served as … Trapped electrons and ions as particle detectors …
Displaying 226 - 250 of 2537
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