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Search Publications

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Displaying 776 - 800 of 3086

Stability of a Penning trap with a quadrupole rotating electric field

February 11, 2005
Author(s)
T Hasegawa, M J. Jensen, John Bollinger
… rotating electric field. The rotation frequency of an ion cloud in a Penning trap determines the cloud density and … center-of -mass stability, combined ion trap, laser cooling, non-neutral plasmas, Penning trap, …

Implementation of CMOS Compatible Conductance-based Micro-Gas-Sensor System

August 28, 2001
Author(s)
Muhammad Afridi, John S. Suehle, Mona E. Zaghloul, Jason E. Tiffany, Richard E. Cavicchi
… microhotplates using bulk micro-machining techniques. Tin-oxide-sensing films were grown over post-patterned gold … operates at temperatures between 20 O C - 450 O C. Tin-oxide-sensing films were isothermally characterized using …

Phase space study of surface electrode Paul traps: Integrable, chaotic, and mixed Motion

May 31, 2018
Author(s)
V. Roberdel, Dietrich Leibfried, D. Ullmo, H. Landa
… the details of integrable and chaotic motion of a single ion. We introduce appropriate phase space measures and give a … that we develop gives a general framework for describing ion dynamics in a broad variety of surface Paul traps. For … chaotic motion, ion trap, phase space, regular motion, stability …

Temperature-Controlled Depth Profiling in Poly(methylmethacrylate) (PMMA) Using Cluster Secondary Ion Mass Spectrometry (SIMS): I. Investigation of Depth Profile Characteristics

February 1, 2007
Author(s)
Christine M. Mahoney, Albert J. Fahey, John G. Gillen
… Secondary Ion Mass Spectrometry (SIMS) employing an SF5+ polyatomic primary ion source was used to depth profile Poly(methyl … rates, damage cross sections, and overall secondary ion stability) were monitored as a function of temperature. … in Poly(methylmethacrylate) (PMMA) Using Cluster Secondary Ion Mass Spectrometry (SIMS): I. Investigation of Depth …

EBIT Observation of Low Charge State Ar Dielectronic Recombination Features Near the Unknown Faint X-Ray Feature Found in the Stacked Spectrum of Galaxy Clusters

February 20, 2019
Author(s)
A. Gall, A. Foster, R. Silwal, Joan M. Dreiling, A. Borovik, E. Kilgore, M. Ajello, John Gillaspy, Yuri Ralchenko, Endre Takacs
… of galaxy clusters (Bulbul et al. 2014), an electron beam ion trap (EBIT) was used to investigate resonant dielectronic … with AtomDB data and numerous Ar DR features from multiple ion charge-states in the energy region near the unidentified …

Electrolytes that reduce electro-osmotic drag improve fast charging of lithium-ion batteries

May 13, 2025
Author(s)
Chang-Xin Zhao, Zeyi Wang, David Jacobson, Yue Li, Boris Khaykovich, Sean Fayfar, Jacob LaManna, Daniel Hussey, Lei Zheng, Gabriel Veith, Fu Chen, Chunsheng Wang
… greater than 4 C) is essential for high-energy lithium-ion batteries in electric vehicles yet remains challenging … optimization strategies concentrate on shortening lithium-ion transport pathways through electrode structure … electro-osmotic drag improve fast charging of lithium-ion batteries …

Reduction of Cobalt and Iron Corroles and Catalyzed Reduction of CO 2

May 1, 2002
Author(s)
J Grodkowski, Pedatsur Neta, E Fujita, A Mahammed, L Simkhovich, Z Gross
… (tpfc = 5,10,15-tris(pentafluorophenyl)corrole), ClFe^IV^(tpfc), and ClFe IV (tdcc) (tdcc = 5,10,15-tris(2,6-dichlorophenyl)corrole) … 0.72 V, -0.42 V (E pc ), -1.44 V, -2.3 V (E pc ); for ClFe IV (tpfc), 0.44 V, -1.01 V (E pc ), -1.60 V, -2.2 V (E pc ); …

Atom Probe Tomography Using an Extreme Ultraviolet Trigger Pulse

September 1, 2023
Author(s)
Benjamin Caplins, Ann Chiaramonti Debay, Jacob Garcia, Norman A. Sanford, Luis Miaja Avila
… most often uses an optical pulse to trigger field ion evaporation -- most commonly, the second or third … extreme ultraviolet (EUV) optical pulses to trigger field ion emission. The EUV light is generated via a commercially … the instrument's ability to successfully trigger field ion emission from semiconductor (Si, GaN) and insulating …

Collision-Induced Dissociation of Deprotonated Peptides. Relative Abundance of Side-Chain Neutral Losses, Residue-Specific Product Ions, and Comparison with Protonated Peptides

November 14, 2017
Author(s)
Yuxue Liang, Pedatsur Neta, Xiaoyu (Sara) Yang, Stephen E. Stein
… High-accuracy MS/MS spectra of deprotonated ions of 390 dipeptides and 137 peptides with 3 to 6 residues … in deprotonated peptides produce specific negative ions after peptide bond cleavage. An expanded list of fragment ions from protonated peptides is also presented and compared …

Effects of Stray Magnetic Field on Transition-edge Sensors in Gamma-ray Microcalorimeters

May 19, 2024
Author(s)
Mark Keller, Abigail Wessels, Dan Becker, Douglas Bennett, Matthew Carpenter, Mark Croce, Jozsef Imrek, Johnathon Gard, John Mates, Kelsey Morgan, Nathan Ortiz, Dan Schmidt, Katherine Schreiber, Daniel Swetz, Joel Ullom
… between anomalous features in TES current-voltage (IV ) curves and degraded energy resolution. After reducing … and improving shielding against external sources, both IV curves and energy resolution improved. Finally, we placed …

The Infrared Spectra of OCS + and OCS - Trapped in Solid Neon

July 1, 2001
Author(s)
C Lugez, Warren E. Thompson, Marilyn E. Jacox
When a Ne:OCS sample was codeposited at approximately 5 K with a beam of neon atoms that were excited in a microwave discharge, the infrared spectrum of the resulting deposit included absorptions which can be assigned to OCS +, OCS -, and one or more dimer

Spin dephasing as a probe of mode temperature, motional state distributions, and heating rates in a two-dimensional ion crystal

March 9, 2014
Author(s)
Brian C. Sawyer, Joseph W. Britton, John J. Bollinger
… (COM) motional mode of a two-dimensional trapped ion crystal of hundreds of 9 Be + . By comparing the measured … insight into the size and nature of errors in trapped ion quantum gates produced by thermal fluctuations of a … measurement places an upper limit on the anomalous single-ion heating rate due to electric field noise from the trap …
Displaying 776 - 800 of 3086
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