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Search Publications

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Displaying 551 - 575 of 3841

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 …

Size-Monodisperse Metal Nanoparticles Via Hydrogen-Free Spray Pyrolysis

April 3, 2002
Author(s)
Jung Hyeun Kim, Thomas A. Germer, George Mulholland, S H. Ehrman
… were produced using a co-solvent approach avoiding use of hydrogen or other reducing gas. Compared with the particles … copper particles, hydrogen-free, light scattering, nanoparticles, size … Size-Monodisperse Metal Nanoparticles Via Hydrogen-Free Spray Pyrolysis …

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. …

Manipulating Interface Magnetism in Manganite Thin Film Membranes by Substrate Surface Chemistry

November 13, 2024
Author(s)
Purnima P. Balakrishnan, Qinwen Lu, Qing Wang, Shinichiro N. Muramoto, Paige Quarterman, Michael R. Fitzsimmons, Timothy R. Charlton, Xiaofang Zhai, Alexander Grutter
… work, we use polarized neutron reflectometry and secondary ion mass spectroscopy to provide a detailed understanding of … plays a key role in either incorporating or excluding hydrogen species at the surfaces of transferred LaMnO3 thin … freestanding films, hydrogen incorporation, hydrophobicity, magnetic anisotropy, …

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 …

Asymptotic and Numerical Analysis of a Premixed Laminar Nitrogen Dioxide-Hydrogen Flame

January 1, 1995
Author(s)
Gregory T. Linteris, F A. Williams
… of eighty-some reactions for flames in mixtures of hydrogen and nitrogen dioxide is systematically reduced to … premixed flames, laminar flames, nitrogen dioxide, hydrogen, burning rate, flame structure … Numerical Analysis of a Premixed Laminar Nitrogen Dioxide-Hydrogen Flame …

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 …

Heavy Ion Induced Soft Breakdown of Thin Gate Oxides

December 1, 2001
Author(s)
J. F. Conley, John S. Suehle, A. H. Johnston, Bin Wang, T Miyahara, Eric M. Vogel, J B. Bernstein
… Heavy ion induced soft and hard breakdown are investigated in thin … reliability, radiation effects, soft breakdown, heavy ion irradiation, microelectronics … Heavy Ion Induced Soft Breakdown of Thin Gate Oxides …

Selectable Resistance-Area Product by Dilute Highly Charged Ion Irradiation

August 13, 2007
Author(s)
Joshua M. Pomeroy, Holger Grube, A C. Perrella, John D. Gillaspy
… from a single process recipe using highly charged ion (HCI) irradiation. The HCI irradiation occurs after … tunnel barrier. The neutralization of the highly charged ion on the tunnel barrier surface (Xe44+) ablates a small … Selectable Resistance-Area Product by Dilute Highly Charged Ion Irradiation …

Dielectronic resonances of LMn and LNn (? 4) series in highly-charged M-shell tungsten ions

March 4, 2020
Author(s)
Dipti Goyal, A. Borovik, Jr., R. Silwal, Joan M. Dreiling, Amy C. Gall, Endre Takacs, Yuri Ralchenko
… 4) dielectronic resonances (DR) in highly-charged M-shell ions of tungsten. The x-ray emission from W$^49+}$ through … resonances, Collisional-radiative modeling, M-shell ions. … and LNn (? 4) series in highly-charged M-shell tungsten ions …

Observations and identifications of extreme ultraviolet spectra of Ca-like to Na-like neodymium ions using an electron beam ion trap

August 23, 2023
Author(s)
Yang Yang, Dipti Dipti, Chihiro Suzukic, A. C. Gall, R. Silwal, Samuel Sanders, Joseph N. Tan, Aung S. Naing, Endre Takacs, Yuri Ralchenko
… Ca-like, Nd40+, through Nalike, Nd49+, highly charged ions have been measured at an electron beam ion trap (EBIT) facility at the National Institute of … EUV spectroscopy, neodymium, electron beam ion trap, collisional-radiative modeling, line identification … ultraviolet spectra of Ca-like to Na-like neodymium ions using an electron beam ion trap …

Measurement of Uranium-236 in Particles by Secondary Ion Mass Spectrometry

January 12, 2017
Author(s)
David S. Simons, John D. Fassett
… of the relative isotopic abundance by secondary ion mass spectrometry of 236U in uranium-containing material … hydride, isotope, isotopic abundance, particle, secondary ion mass spectrometry, SIMS, uranium … Measurement of Uranium-236 in Particles by Secondary Ion Mass Spectrometry …

Estimation of the critical external heat leading to the failure of lithium-ion batteries

June 29, 2020
Author(s)
Wei Tang, Andy Tam, Liming Yuan, Thomas Dubaniewicz, Richard Thomas, John Soles
… critical external heat leading to the failure of lithium-ion (Li-ion) batteries was conducted using an Accelerating Rate … Safety and Health (NIOSH). Several types of commercial Li-ion batteries were selected, including iron phosphate Li-ion … Lithium-ion battery, Accelerating Rate Calorimetry, Heat to failure, …

Potential energy surface for interactions between two hydrogen molecules

September 4, 2008
Author(s)
Allan H. Harvey, Konrad Patkowski, Wojciech Cencek, Piotr Jankowski, Krzysztof Szalewicz, Giovanni Garberoglio
… energies of interaction between two ground-state hydrogen molecules with intramolecular distances fixed at … computational chemistry, hydrogen, potential energy surface, second virial coefficient … Potential energy surface for interactions between two hydrogen molecules …

Electron-Impact Total Ionization Cross Sections of Hydrocarbon Ions

February 1, 2002
Author(s)
Karl K. Irikura, Yong Sik Kim, M A. Ali
… 6 + , and H 3 O + . The cross sections for the hydrocarbon ions are needed for modeling cool plasmas in fusion devices. … , CH 4 + , electron-impact ionization, H 3 O + , molecular ions … Total Ionization Cross Sections of Hydrocarbon Ions …

Hydrogen Concentration-Induced Stresses in an Environmental TEM

April 25, 2022
Author(s)
Matthew Connolly, Veruska Malave, May Martin
… The hydrogen-enhanced localized plasticity (HELP) mechanism is a leading candidate among proposed hydrogen embrittlement (HE) mechanisms. Transmission electron … of an increased dislocation mobility on exposure to hydrogen have provided the most direct evidence for the HELP …

Toward 3D printed hydrogen storage materials made with ABS-MOF composites

September 26, 2017
Author(s)
Megan C. Kreider, Zeeshan Ahmed, Makfir Sefa, James A. Fedchak, Julia Scherschligt, Michael Bible, Nikolai Klimov, Bharath Natarajan, Hartings Mathew
… effort to generate materials that are capable of storing hydrogen. Metal-organic framework materials (MOFs) have been … composite plastic, hydrogen storage, sensor, additive manufacturing, 3d printing … Toward 3D printed hydrogen storage materials made with ABS-MOF composites …

Measurements and Modeling of Ion Energy Distributions in High-Density, Radio-Frequency Biased CF 4 Discharges

May 1, 2002
Author(s)
Mark A. Sobolewski, Yicheng Wang, A N. Goyette
… Models of ion dynamics in radio-frequency (rf) biased, high-density plasma sheaths are needed to predict ion bombardment energies in plasma simulations. To test these models, we have measured ion energy distributions (IEDs) in pure CF 4 discharges at … CF4, high-density plasma, inductively coupled discharge, ion energy distribution, plasma processing, radio-frequency …
Displaying 551 - 575 of 3841
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