40,554 research outputs found
The Theory of SNOM: A Novel Approach
In this paper we consider the application of electromagnetic theory to the
analysis of the Scanning Near-field Optical Microscope (SNOM) in order to
predict experimentally observable quantities such as the transmission or
reflection coefficients for a particular tip-surface configuration. In
particular we present the first application of a transfer matrix based
calculation to this challenging problem by using an adaptive co-ordinate
transformation to accurately model the shape of the SNOM tip.
We also investigate the possibility of increasing the transmitted light
through the SNOM tip by introducing a metal wire into the centre of the tip.
This converts the tip into a co-axial cable. We show that, in principle, this
can dramatically improve the transmission characteristics without having a
detrimental effect on the resolution.Comment: 19 pages, 11 figures. To be published in the Journal of Modern Optic
Replacement of fluid-filter elements without interruption of flow
Gatling-type filter assembly, preloaded with several filter elements enables filter replacement without breaking into the operative fluid system. When the filter element becomes contaminated, a unit inner subassembly is rotated 60 degrees to position a clean filter in the line
QED X QCD Exponentiation: Shower/ME Matching and IR-Improved DGLAP Theory at the LHC
We discuss the elements of QED X QCD exponentiation and its interplay with
shower/ME matching and IR-improved DGLAP theory in precision LHC physics
scenarios. Applications to single heavy gauge boson production at hadron
colliders are illustrated.Comment: 5 pages, 1 figure; presented by B.F.L. Ward at ICHEP0
Precision Electro-Weak and Hadronic Luminosity Calculations
We have used YFS Monte Carlo techniques to obtain per-mil level accuracy for
the Bhabha scattering cross section used in the luminosity monitor in
electro-weak scattering experiments. We will describe techniques for extending
these methods for use in the W production luminosity cross section for hadron
colliders.Comment: 8 pages (LaTex) with 5 figures (EPS). Presented by S.A. Yost at the
Third International Symposium on Quantum Theory and Symmetries, Cincinnati,
Sept. 10 - 14, 200
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