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Displaying 44651 - 44675 of 73960

Tri-Alpha-Napthyl Benzene as a Crystalline or Glassy Matrix for Matrix-Assisted Laser Desorption/Ionization: A Model System for the Study of Effects of Dispersion of Polymer Samples at a Molecular Level

January 1, 2002
Author(s)
Barry J. Bauer, Kathleen M. Flynn, Da-Wei Liu, William R. Blair
Tri-a-napthyl benzene (TaNB) is used as a matrix in matrix-assisted laser desorption/ionization (MALDI) spectroscopy. Electrosprayed TaNB is crystalline and has a melting point of 180 2 C. After heating above the melting point, TaNB becomes amorphous with

Triggered Image Capture for High Speed Display Characterization

January 1, 2002
Author(s)
John W. Roberts
¿¿¿Precision display measurements often involve the integration of light measurements over many frames. Newer display technologies with high speed light modulators such as micromirrors are able to make sophisticated use of temporal modulation. This may

Two-Species Magneto-Optical Trap With 40 K and 87 Rb

January 1, 2002
Author(s)
J Goldwin, S Papp, B. L. DeMarco, D S. Jin
We trap and cool a gas composed of 40K and 87 Rb, using a two-species magneto-optical trap (MOT). This trap represents the first step towards cooling the Bose-Fermi mixture to quantum degeneracy. Laser light for the MOT is derived from laser diodes and

Unexpected Ground State Structures in Relaxor Ferroelectrics

January 1, 2002
Author(s)
Benjamin P. Burton, Eric J. Cockayne
Cluster expansion Hamiltonians derived from pseudopotential total energies were used to predict ground-state (GS) cation configurations for some A(B^{3+}1⁄2B'^{5+}1⁄2)O3, A(B^{2+}{1/3}B'^{5+}{2/3})O3 , and [A^{1+}1⁄2A'^{3+}1⁄2]BO3 perovskites. Predicted GS

Uniformity Studies of Congruent LiNbO 3 by Means of Maker Fringe Analysis

January 1, 2002
Author(s)
Norman Sanford, J A. Aust
Nonlinear optical analysis was used to map the uniformity of LiNbO 3 wafers in terms of birefringence, composition, thickness and strain. Birefringence variations are directly related to variations in the composition of the material. The typical variation

Variable mutual inductance in critical-current measurements

January 1, 2002
Author(s)
Loren F. Goodrich, Theodore C. Stauffer
We have investigated the mutual inductance observed on pairs of voltage tapes that are soldered to superconducting wires in order to measure the voltage-current (V-I) characteristics & determine the critical current. Measurements on a Nb-Ti superconductor
Displaying 44651 - 44675 of 73960
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