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Search Publications

NIST Authors in Bold

Displaying 126 - 150 of 3310

Fabrication of Specimens for Atom Probe Tomography using a Combined Gallium and Neon Focused Ion Beam Milling Approach

August 16, 2023
Author(s)
Frances Allen, Paul Blanchard, David Pappas, Russell Lake, Deying Xia, John Notte, Ruopeng Zhang, Andrew Minor, Norman A. Sanford
… We demonstrate a new focused ion beam sample preparation method for atom probe tomography. … The key aspect of the new method is that we use a neon ion beam for the final tip shaping after conventional annulus milling using gallium ions. This dual-ion approach combines the benefits of the faster milling …

Nanoscale Focused Ion Beam from Laser-cooled Lithium Atoms

October 26, 2011
Author(s)
Brenton J. Knuffman, Adam V. Steele, Jon Orloff, Jabez J. McClelland
… To advance the capabilities of focused ion beam (FIB) technology, we have created a low-energy FIB … in a magneto-optical trap (MOT). This magneto-optical trap ion source relies on both the low temperature of the … energy spread of the resultant beam to form a nanoscale ion probe at its focus. We present examples of microscopy …

Highly Charged Ions in Rare Earth Permanent Magnet Penning Traps

July 13, 2012
Author(s)
Nicholas D. Guise, Samuel Brewer, Joseph Tan
… the isolation, manipulation, and study of highly charged ions. Highly charged ions are produced in the NIST electron-beam ion trap (EBIT), … NdFeB permanent magnets integrated into its electrodes. Ions of charge Qe, emerging from the EBIT with energy up to … Highly Charged Ions in Rare Earth Permanent Magnet Penning Traps …

EUV spectra of Rb-like to Cu-like gadolinium ions in an electron beam ion trap

October 8, 2012
Author(s)
Yuri Ralchenko, Deirdre Kilbane, G. O'Sullivan, John D. Gillaspy, Joseph Reader
… ultraviolet radiation from highly-charged gadolinium ions were made at the National Institute of Standards and Technology. The ions were produced and confined in an electron beam ion trap (EBIT) and the spectra were recorded with a … Gadolinium, highly-charged-ions, extreme-ultraviolet spectra, collisional-radiative …

The New SURF Beamline 3

May 18, 2016
Author(s)
Robert E. Vest
… at the Synchrotron Ultraviolet Radiation Facility (SURF III) on the Gaithersburg, MD campus of the National Institute of Standards and Technology (NIST). SURF III is a 380-MeV synchrotron radiation source providing … ultraviolet, radiometry, synchrotron radiation, SURF III …

Identifications of extreme ultraviolet spectra of Br-like to Ni-like neodymium ions using an electronbeam ion trap

April 30, 2021
Author(s)
C. Suzuki, Dipti Goyal, Y. Yang, A. Gall, Roshani Silwal, S. Sanders, Aung S. Naing, Joseph N. Tan, Endre A. Takacs, Yuri Ralchenko
… extreme ultraviolet spectra of open N-shell neodymium (Nd) ions have been recorded in an electron beam ion trap facility at the National Institute of Standards and … code. Consequently, 59 lines from Br-like to Ni-like Nd ions have been unambiguously identi ed, most of which are …

Monitoring Ion Current and Ion Energy During Plasma Processing Using Radio-Frequency Current and Voltage Measurements

February 1, 2001
Author(s)
Mark A. Sobolewski
… common diagnostic techniques can be used to measure ion current and ion energy, these techniques areusually not compatible with … by industry. Methods have been proposed for determining ion properties from the applied rf current and voltage, which … current, electrical measurements, energy, flux, ion, plasma processing, process monitoring, radio-frequency …

Stresses in Ion Exchange Layers of Soda-Lime-Silicate Glass

June 1, 2005
Author(s)
Theo Fett, J -. Guin, Sheldon M. Wiederhorn
… stresses that develop as a consequence of sodium/hydrogen ion exchange in soda-lime-silicate glass immersed in water. … of the stress is consistent with earlier findings that the ion-exchange process involves hydronium ions (H 3 O +) and … corrosion, fracture, fracture mechanics, glass, ion exchange …

Simulating Quantum Magnetism with Correlated Non-Neutral Ion Plasmas

August 27, 2012
Author(s)
John J. Bollinger, Joseph W. Britton, Brian C. Sawyer
… depend on the internal atomic state (or spin) of an atomic ion, the Coulomb potential energy of a strongly coupled array … effective spin interactions are engineered with trapped ion crystals. We summarize the type of effective spin … discuss an experimental implementation using single- plane ion crystals in a Penning trap. …

Cascade Transition X-Rays From Electron Capture Into Highly Charged Ions in Collisions With Neutral Gas Targets

May 1, 2003
Author(s)
H Tawara, E Takacs, L P. Ratliff, John D. Gillaspy, K Tokesi
… have been observed from low energy, highly charged Kr 1+ ions (q=27-36) colliding with neutral Ar atoms. The intensity … formed during cascades after electron capture into Kr 27+ ions. This is also supported by time-dependent population … charge exchange, highly charged ions, ion-atom collisions, x-rays …

Spectroscopic analysis of N-intrashell transitions in Rb-like to Ni-like Yb ions

June 9, 2020
Author(s)
Dipti Goyal, R. Silwal, Joan M. Dreiling, Samuel C. Sanders, Endre A. Takacs, Yuri Ralchenko
… Extreme ultraviolet spectra of highly-charged ytterbium ions produced in an electron beam ion trap at National … were identi ed in Rb-like Yb33+ through Ni-like Yb42+ ions. The e ects of strong con guration interaction within … Spectroscopy, electron beam ion trap, highly-charged ions, ytterbium, collisional-radiative modeling …

Trapped Ions, Entanglement, and Quantum Computing, ed. by B.L. Fearey

January 1, 1998
Author(s)
C J. Myatt, B E. King, D Kielpinski, Dietrich Leibfried, Q A. Turchette, Chris S. Wood, Wayne M. Itano, C Monroe, David J. Wineland
… range of 5-20 MHz. The equilibrium positions of pairs of ions that are crystallized in this trap lie along the long … potential to the trap, the micromotion of two crystallized ions may be reduced relative to the case of pure rf … a scheme to use this effect to differentially address the ions. …

Dissipative preparation of W states in trapped ion systems

July 2, 2021
Author(s)
Daniel Cole, Jenny Wu, Stephen Erickson, Panyu Hou, Andrew C. Wilson, Dietrich Leibfried, Florentin Reiter
… protocols for dissipative entanglement of three trapped-ion qubits, and we discuss in detail a scheme that uses … to generate one of six target W states in a three-ion qubit space. Using a beryllium-magnesium ion crystal as an example system, we theoretically …

Behavior of molecules and molecular ions near a field emitter

March 18, 2016
Author(s)
Ann C. Chiaramonti Debay, Baptiste Gault, Michael Ashton, Susan B. Sinnott, Michael P. Moody, David W. Saxey, D. K. Schreiber
… APT experiments often incorporate the detection molecular ions emitted from the specimen, in particular from covalently … an APT experiment by dissociation of metastable molecular ions. … Behavior of molecules and molecular ions near a field emitter …

Intercombination and Forbidden Transition Rates in C- and N-Like Ions (O 2+ , F 3+ and S 9+ ) Measured at a Heavy-Ion Storage Ring

August 1, 2000
Author(s)
E Trabert, A G. Calamai, John D. Gillaspy, G Gwinner, X Tordoir, A Wolf
… between the levels of the ground state in C-like ions of O and F and in N-like ions of S have been measured optically at a heavy-ion storage ring. The lifetime results, 1.250(13) ms for the … excited-state lifetime, Fluorine, highly-charged ion, oxygen, storage ring, sulfur, ultraviolet …

Imaging Nanophotonic Modes of Microresonators using a Focused Ion Beam

January 15, 2016
Author(s)
Kevin A. Twedt, Jie J. Zou, Marcelo I. Davanco, Kartik A. Srinivasan, Jabez J. McClelland, Vladimir A. Aksyuk
… local optomechanical perturbation using a focused lithium ion beam. An ion beam (radius ≈50 nm) induces a picometer-scale dynamic … Our technique also enables in-situ observation of ion implantation damage and relaxation dynamics in a silicon … microresonators, focused ion beams, optomechanics …

Highly Charged Ion Bombardment of Silicon Surfaces

August 1, 2003
Author(s)
J E. Sanabia, S N. Goldie, L P. Ratliff, Lori S. Goldner, John D. Gillaspy
… In an attempt to verify these results, highly charged ion-irradiated silicon samples were prepared at the Electron Beam Ion Trap facility at the National Institute of Standards and … cross section, fluorescence, highly charged ion, photoluminescence, silicon … Highly Charged Ion Bombardment of Silicon Surfaces …

Communication-Comparison of Nanoscale Focused Ion Beam and Electrochemical Lithiation in beta-Sn Microspheres

December 5, 2016
Author(s)
Saya Takeuchi, William R. McGehee, Jennifer L. Schaefer, Truman M. Wilson, Kevin A. Twedt, Christopher L. Soles, Vladimir P. Oleshko, Eddie H. Chang, Jabez J. McClelland
… The development of Li focused ion beams (Li-FIB) enables controlled Li ion insertion into materials with nanoscale resolution. We … establishing the relevance of the Li-FIB for studies of ion dynamics in electrochemically active materials by … Li-FIB, lithium-ion battery, Sn …

Ion Coulomb crystals: an exotic form of condensed matter

August 24, 2025
Author(s)
Giovanna Morigi, John Bollinger, Michael Drewsen, Daniel Podolsky, Efrat Shimshoni
… fluorescence. These unique and unusual properties make ion crystals a powerful platform for studying phases of … theoretical framework and experimental characterization of ion Coulomb crystals from a condensed-matter perspective. We … exploring novel condensed matter phenomena with trapped ion crystals, as well as their many scientific and technical …

Designing artificial cells to harness the biological ion gradient

November 23, 2008
Author(s)
Jian Xu, David A. LaVan
… contain numerous natural nanoscale conductors, i.e. ion channels and ion pumps1-4, that work in concert to form transmembrane or transcellular ion gradients that can be triggered to release an action … electrocyte, ion channel, artificial cell, nanoconductor, biological …

Surface science for improved ion traps

September 30, 2013
Author(s)
David P. Pappas, Dustin Hite, Andrew C. Wilson, David T. Allcock, David J. Wineland, Dietrich Leibfried, Yves Colombe
… This noise has been an obstacle to progress in trapped-ion quantum information processing (QIP) experiments for more … sources. Experimental evidence of its dependence on ion-electrode distance, frequency, and electrode temperature … that it may not be a fundamental limit to trapped-ion QIP. Moreover, the extreme sensitivity of trapped ions to …

Al, B, and Ga Ion-Implantation Doping of SiC

November 1, 2000
Author(s)
E Handy, M V. Rao, O W. Holland, P Chi, K A. Jones, M A. Derenge, R D. Vispute, T Venkatesan
… A Series of single energy Al, B, and Ga ion implants were performed in the energy range 50 keV - 4 … to characterize the implant depth profiles using secondary ion mass spectrometry (SIMS). From the implant depth profiles … A1N, diffusion, Ion Implantation, SiC, SIMS …
Displaying 126 - 150 of 3310
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