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Search Publications

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Displaying 676 - 700 of 2933

Effects of Lightpipe Proximity on Si Wafer Temperature in Rapid Thermal Processing Tools

September 1, 2003
Author(s)
Kenneth G. Kreider, D H. Chen, D P. DeWitt, William A. Kimes, Benjamin K. Tsai
Lightpipe radiation thermometers (LPRTs) are the preferred temperature monitoring sensor in most rapid thermal processing (RTP) tools for semiconductor fabrication. These tools are used for dopant anneal, gate oxide formation, and other high temperature

Impulsive Loading of Cellular Media in Sandwich Construction

July 31, 2005
Author(s)
Joseph A. Main, George A. Gazonas
Motivated by recent efforts to mitigate blast loading using energy absorbing materials, this paper investigates the uniaxial crushing of cellular media in sandwich construction under impulsive pressure loading. The cellular core material is modeled using a

Key Considerations for Microbial Viability Measurements

January 14, 2020
Author(s)
Joy Dunkers, Sandra M. Da Silva, Stephanie Servetas, James J. Filliben, Guilherme L. Pinheiro, Nancy Lin
Making reliable measurements of antimicrobial killing efficacy requires careful consideration of the sources of biological variability, measurement bias and error throughout the entire workflow. For ultraviolet-C (UV-C) disinfection, killing efficacy is

GRADED STRUCTURES FOR ALL-CERAMIC RESTORATIONS

May 17, 2010
Author(s)
Yu Zhang, H Chai, Brian R. Lawn
One failure mode of all-ceramic crown restorations is radial cracking at the cementation surface, from occlusally-induced flexure of the stiffer crown layer on the softer dentin underlayer. We hypothesize that such failure may be substantially mitigated by

Whisker Formation in Pb-Free Surface Finishes

February 2, 2010
Author(s)
Gery R. Stafford, Maureen E. Williams, Jae W. Shin, Kil-Won Moon, William J. Boettinger, Carlos R. Beauchamp
… time. The appearance of hillocks and/or whiskers following plating is influenced by several factors such as intrinsic …

Failure of Glass Layers on Polymeric Substrates From Vickers Indentation

March 25, 2006
Author(s)
Herzl Chai, Brian R. Lawn
A study is made of median crack evolution in brittle coatings subjected to sharp contacts. A model bilayer system consisting of a glass plate bonded to a polycarbonate base, with a Vickers pyramid as indenter, is used to demonstrate the evolution in situ

Contact Damage in Brittle Coating Layers: Influence of Surface Curvature

December 1, 2004
Author(s)
T Qasim, M T. Bush, X Z. Hu, Brian R. Lawn
Fracture from indentation by a hard sphere on bilayer systems composed of curved brittle coating layers on compliant polymeric substrates is investigated, in simulation of dental crown structures. Glass plates 1 mm thick are used are used as representative

Sensitivity of Electronic Structure to Crystal Distortions in Infinite-Layered LaNiO2

January 23, 2025
Author(s)
S. Rathnayaka, S. Yano, J. B. Moree, K. Kawashima, J. Akimitsu, Craig Brown, J. Neuefeind, D. Louca
Recent observations of unconventional superconductivity (SC) in thin films of LaNiO2 (critical temperature Tc  10 K) and in bulk single crystals of La3Ni2O7 under pressure Tc  80K have cemented a long sought-after class of SC nickelates. In La1−xSrxNiO2

A New Determination of G

October 12, 2021
Author(s)
J P. Schwarz, J E. Faller, T M. Niebauer, F Klopping, D S. Robertson, G Sasagawa
A short test run of the apparatus was conducted in February 1997 and gave promising results. A difference signal of about 80 υGal was observed, with reasonable scatter in G values from day to day. A sample of the data is seen in figure 1. This scatter

Progress on the BL2 beam measurement of the neutron lifetime

April 17, 2021
Author(s)
Shannon M. Hoogerheide, Jimmy P. Caylor, Evan R. Adamek, Eamon S. Anderson, Ripan Biswas, B. E. Crawford, Christina DeAngelis, Maynard S. Dewey, N Fomin, David M. Gilliam, Kyle Grammer, G L. Greene, Robert W. Haun, Jonathan Mulholland, Hans Pieter Mumm, Jeffrey S. Nico, William M. Snow, F E. Wietfeldt, Andrew Yue
A precise value of the neutron lifetime is important in several areas of physics, including determinations of the quark-mixing matrix element |Vud|, related tests of the Standard Model, and predictions of light element abundances in Big Bang

aCORN: an experiment to measure the electron-antineutrino correlation coefficient in free neutron decay

August 1, 2017
Author(s)
Maynard S. Dewey, Fred B. Bateman, Wangchun Chen, Thomas R. Gentile, Md. T. Hassan, Michael P. Mendenhall, Jeffrey S. Nico, Brian Collett, Jim Byrne, William Byron, Guillaume Darius, Christina DeAngelis, Gordon L. Jones, Alexander Komives, Alexander Laptev, George Noid, Hyeonseo Park, Ed Stephenson, I Stern, K Stockton, Bob Trull, Fred Wietfeldt, B G. Yerozolimsky
We describe an apparatus used to measure the electron-neutrino angular correlation coefficient, a, in free neutron decay. The apparatus employs a novel measurement technique in which the angular correlation is converted into a proton time-of-flight

A Reassessment of Absolute Energies of X-ray L Lines of Lanthanide Metals

June 28, 2017
Author(s)
Bradley Alpert, W.Bertrand (Randy) Doriese, Gene C. Hilton, Lawrence T. Hudson, Young I. Joe, Kelsey Morgan, Carl D. Reintsema, Dan Schmidt, Daniel Swetz, Csilla Szabo-Foster, Joel Ullom, Joseph Fowler, Galen O'Neil, Douglas Bennett
We introduce a new technique for determining x-ray fluorescence line energies and widths, and we present measurements made with this technique of 22 x-ray L lines from lanthanide-series elements. The technique uses arrays of transition-edge sensors

Enhanced Sensitivity to Variation of m e /m p in Molecular Spectra

October 16, 2008
Author(s)
D DeMille, S Sainis
We propose new experiments with high sensitivity to a variation in the electron-to-proton mass ratio \mu=me/mp. We consider a close pair of molecular vibrational levels, where each state is associated with a different electronic potential. The change in
Displaying 676 - 700 of 2933
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