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Displaying 151 - 175 of 2768

Evidence for multiple mechanisms underlying surface-electric field noise in ion traps

December 27, 2018
Author(s)
J. A. Sedlacek, J. Stuart, Daniel Slichter, C. D. Bruzewicz, R. McConnell, J. M. Sage, J. Chiaverini
… Energetic ion bombardment, or ion milling, of ion-trap electrode surfaces has previously been shown to … Here, using motional heating of a single trapped strontium ion, we investigate the temperature dependence of this noise … anomalous heating, electric field noise, ion milling, ion trap …

Mobilities and Formation Kinetics of NH 4 + (NH 3 ) n Cluster Ions (n=0-3) in helium and helium/ammonia mixtures

January 1, 1997
Author(s)
M Krishnamurthy, J A. de Gouw, L N. Ding, V M. Bierbaum, S R. Leone
… NH 4 + (NH 3 ) n (n=1-3) cluster ions are formed in a field free flow tube section of a … measurements. The zero-field mobilities of the cluster ions in helium (22.1 +or-}0.3 cm 2 V -1 s -1 for NH 4 + , … of the geometric cross sections of the different cluster ions. The zero-field mobilities of NH 4 + (0.94 +or-} 0.15 cm …

Microfabricated Chip Traps for Ions

April 12, 2011
Author(s)
Jason Amini, Joseph W. Britton, Dietrich G. Leibfried, David J. Wineland
… ions, traps, microfabrication … Microfabricated Chip Traps for Ions …

A Focused Chromium Ion Beam

October 21, 2010
Author(s)
Adam V. Steele, Brenton J. Knuffman, Jabez J. McClelland, Jon Orloff
… With the goal of expanding the capabilities of focused ion beam microscopy and milling systems, we have demonstrated … of chromium ions produced in a magneto-optical trap ion source (MOTIS). Neutral chromium atoms are captured into … to energies between 0.5 keV and 3 keV. The accelerated ion beam is scanned with a dipolar deflector and focused onto …

Inelastic Neutron Scattering on Polymer Electrolytes for Lithium-Ion Batteries

May 7, 2012
Author(s)
Huagen H. Peng, Madhu Sudan Tyagi, Kirt A. Page, Christopher Soles
… The relationship between ion transport and polymer dynamics is central to the pursuit … solid polymer electrolyte systems of sufficiently high ion conductivities. Solid polymer electrolytes are highly … liquid electrolytes that are used today in commercial Li+ ion battery systems. Here we introduce inelastic neutron …

The Use of an SF5+ Primary Ion Beam for Ultra Shallow Depth Profiling on an Ion Microscope SIMS Instrument

October 16, 2008
Author(s)
J Greg Gillen, Marlon L. Walker, P E. Thompson, J Bennett
… has been fitted with a modified hot filament duoplasmatron ion source for generation of SF 5 + primary ion beams for SIMS depth profiling applications. The SF 5 + primary ion beam has been evaluated by depth profiling of several low … polyatomic primary ions, secondary ion mass spectrometry, sulfur hexafluoride, ultra shallow …

Effect of Bifunctional Comonomers on Mechanical Strength and Water Sorption of Amorphous Calcium Phosphate- and Silanized Glass-filled Bis-GMA-Based Composites

August 1, 2003
Author(s)
Drago Skrtic, Joseph M. Antonucci
… dimethacrylate (GDMA) or ethylene glycol methacrylate phosphate (PHEMA). Triethyleneglycol dimethacrylate, a widely … (1) a hydrophilic, silica-modiried amorphous calcium phosphate (Si-ACP) and (2) a more hydrophobic silianized … amorphous calcium phosphate, biaxial flexure, methacrylate composites, …

Effect of Chemical Structure and Composition of the Resin Phase on Mechanical Strength and Vinyl Conversion of Amorphous Calcium Phosphate-Based Composites

March 1, 2004
Author(s)
Drago Skrtic, Joseph M. Antonucci, Walter G. McDonough, D W. Liu
… anti-demineralizaing/remineralizing, amorphous calcium phosphate (ACP)-based composites are in need of improvment. … amorphous calcium phosphate, composite, FTIR microspectroscopy, hybridization, … Strength and Vinyl Conversion of Amorphous Calcium Phosphate-Based Composites …

Laser Cooling of Trapped Ions

January 1, 1991
Author(s)
Wayne M. Itano, James C. Bergquist, John J. Bollinger, David J. Wineland
… Fermi Summer School, Laser Manipulation of Atoms and Ions … Enrico Fermi Summer School, Laser Manipulation of Atoms and Ions … Laser Cooling of Trapped Ions …

Mobilities of aromatic ions drifting in helium

October 12, 2021
Author(s)
M Krishnamurthy, J A. de Gouw, V M. Bierbaum, S R. Leone
… tube (SIFDT) apparatus. The reduced mobilities of these ions in helium are measured as a function of the … in the drift tube). The reduced mobilites of the dimer ions are compared with the measured mobilities of naphthalene … cross sections computed from the geometric structures of ions using a hard sphere model. The results suggest that the …

Transport of Quantum States and Separation of Ions in a Dual RF Ion Trap

September 1, 2002
Author(s)
Mary A. Rowe, A. Ben-Kish, B. DeMarco, D. Leibfried, V. Meyer, James A. Beall, J. Britton, J. Hughes, Wayne M. Itano, Branislav M. Jelenkovic, C. Langer, T. Rosenband, David J. Wineland
… We have investigated ion dynamics associated with a dual linear ion trap where ions can be stored in and moved betweenn two distinct … coherence. In addition, we have separated two ions held in a common trap into two distinct traps. … quantum computation, quantum state engineering, trapped ions …

Quantum Logic Spectroscopy with Ions in Thermal Motion

April 16, 2020
Author(s)
Daniel Kienzler, Yong Wan, Stephen Erickson, Jenny Wu, Andrew C. Wilson, David J. Wineland, Dietrich Leibfried
… for implementing quantum logic spectroscopy on trapped ions, which combines probe and information transfer from the … quantum logic, spectroscopy, trapped ions … Quantum Logic Spectroscopy with Ions in Thermal Motion …

Fast transport of mixed-species ion chains within a Paul trap

November 6, 2014
Author(s)
Ryan S. Bowler, M. Palmer, John P. Gaebler, Dietrich G. Leibfried, J. G. Ceremuga
… We investigate the dynamics of mixed-species ion crystals during transport between spatially distinct … show how to extend this approach to longer mixed-species ion strings. Fast transport of mixed-species ion strings can significantly reduce the time overhead in …

S and Si Ion-Implantation in GaSb Grown on GaAs

December 1, 1999
Author(s)
M V. Rao, A K. Berry, T Q. Do, M C. Ridgway, P Chi, J Waterman
… Single and multiple energy S and Si ion-implantations were performed at room temperature (RT) and … with a Si 3 N 4 cap at 400-600 C for 5 min. Secondary ion mass spectrometry measurements indicated thermal … doping, ion-implantation, secondary ion mass spectrometry …

Individual Ion Addressing with Microwave Field Gradients

April 26, 2013
Author(s)
Ulrich J. Warring, C. Ospelkaus, Yves Colombe, Robert Jordens, Dietrich G. Leibfried, David J. Wineland
… ion cooling, ion trapping, mechanical effects of light on ions, quantum … Individual Ion Addressing with Microwave Field Gradients …

Secondary Ion Mass Spectrometry Using Cluster Primary Ion Beams

January 1, 2003
Author(s)
John G. Gillen, Albert J. Fahey
… for conducting cluster SIMS experiments on both our ion microscope and TOF-SIMS instruments. This paper will review our recent work on cluster ion source development, elemental depth profiling with cluster primary ion beams and the use of cluster ion beams for organic …

Trapped-Ion State Detection through Coherent Motion

December 9, 2011
Author(s)
Till P. Rosenband, David Hume, Chin-Wen Chou, David R. Leibrandt, Michael J. Thorpe, David J. Wineland
… is the ability to detect the state of an individual ion. Current detection techniques 3–6 are applicable only to … coherent motion that can be applied to a larger class of ion systems. We couple a “spectroscopy” ion to a “control” ion in the same trap via mutual Coulomb …
Displaying 151 - 175 of 2768
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