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NIST Authors in Bold

Displaying 326 - 350 of 3086

Time-of-Flight Secondary Ion Mass Spectrometry (TOF-SIMS) for High-Throughput Characterization of Biosurfaces

January 1, 2003
Author(s)
S V. Roberson, A Sehgal, Albert J. Fahey, Alamgir Karim
… film. In this preliminary work, we tracked the secondary ion intensities of various species along the 45 mm length of … film. We noticed consistent trends, with the secondary ion signals for oxidized species steadily increasing with the … Time-of-Flight Secondary Ion Mass Spectrometry (TOF-SIMS) for High-Throughput …

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 …

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 …

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 …

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 …

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 …

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 …

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 …

Ion Energy Distributions and Sheath Voltages in Radio-Frequency-Biased, Inductively-Coupled, High-Density Plasma Reactor

April 1, 1999
Author(s)
Mark A. Sobolewski, James K. Olthoff, Yicheng Wang
… Ion energy distributions were measured at a grounded surface … frequency, radial position, inductive source power, and ion mass. The ground sheath voltage which accelerates the … the measurements provide a complete characterization of ion dynamics in the sheath, allowing ion transit time effects …

Non-magnetic ion site disorder effects on the quantum magnetism of a spin-1/2 equilateral triangular lattice antiferromagnet

March 10, 2022
Author(s)
Qing Huang, R. Rawl, W. W. Xie, E. S. Chou, V. S. Zapf, X. X. Ding, C. Mauws, C. R. Wiebe, E. X. Feng, H. B. Cao, W. Tian, J. Ma, Yiming Qiu, Nicholas Butch, H. D. Zhou
… With the motivation to study how non-magnetic ion site disorder affects the quantum magnetism of … of Ba2.87Sr0.13CoSb2O9 with Sr doping on non-magnetic Ba2+ ion sites. The results show that Ba2.87Sr0.13CoSb2O9 exhibits … Ba3CoSb2O9, which demonstrates that the non-magnetic ion site disorder (the Sr doping) plays a complex role on the …

Trap-Integrated Superconducting Nanowire Single-Photon Detectors with Improved RF Tolerance for Trapped-Ion Qubit State Readout

April 24, 2023
Author(s)
Benedikt Hampel, Daniel Slichter, Dietrich Leibfried, Richard Mirin, Sae Woo Nam, Varun Verma
… State readout of trapped-ion qubits with trap-integrated detectors can address … that are integrated into linear surface-electrode rf ion traps. The shielded SNSPDs can be operated at applied rf … high-fidelity state readout of a wide range of trapped ion species in a typical cryogenic apparatus. …

Argon-Ion Treatment of Multi-Material Layered Surface-Electrode Traps for Noise Mitigation

November 28, 2025
Author(s)
Dustin Hite, Tobias Schaetz, Deviprasath Palani, Florian Hasse, Philip Kiefer, Frederick Bockling, Daniel Stick, Ulrich Warring
… Electric-field noise near ion-trap electrodes limits motional coherence and represents a key obstacle to scaling trapped-ion quantum systems. Here, we investigate how in situ Ar+ … precise control of material interfaces in next-generation ion-trap architectures. …

Trap-integrated superconducting nanowire single-photon detectors for trapped-ion qubit state readout

June 7, 2024
Author(s)
Benedikt Hampel, Daniel Slichter, Dietrich Leibfried, Richard Mirin, Varun Verma
… State readout of trapped-ion qubits is usually achieved by observing qubit-state-dependent fluorescence from the ion while driving an optical cycling transition with laser … of photon detectors for fluorescence detection into the ion trap itself may benefit the development of many-qubit …

Emission-Line Intensity Ratios in FeXVII Observed with a Microcalorimeter on an Electron Beam Ion Trap

December 1, 2000
Author(s)
J M. Laming, I Kink, E Takacs, James V. Porto, John D. Gillaspy, E Silver, H. Schnopper, Simon R. Bandler, N Brickhouse, S Murray, M Barbera, A K. Bhatia, G. A. Doschek, N. Madden, D Landis, J. Beeman, E. E. Haller
… Institute of Standards and Technology electron beam ion trap (EBIT) with a microcalorimeter detector. . . .Both … atoms, electron beam ion trap, emission-line intensity ratios, intensity ratios, … Observed with a Microcalorimeter on an Electron Beam Ion Trap …

Extended and Revised Analysis of Singly Ionized Tin: Sn II

October 28, 2014
Author(s)
K. Haris, Alexander Kramida, A. Tauheed
… The electronic structure of singly ionized tin (Sn II) is partly a one-electron and partly a … Extended and Revised Analysis of Singly Ionized Tin: Sn II …
Displaying 326 - 350 of 3086
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