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- W2045586144 abstract "The ultrasonic wave field modeling reported in this paper has been undertaken with a view to optimizing the design of a conical scanning probe microscope tip to be used in measuring the near surface elastic properties of solids at high frequencies and high spatial resolution. The modeling is concerned with the evolution of a pulse which is launched from the upper spherical shaped surface of the tip, and is aimed at achieving the greatest possible concentration of acoustic energy at the lower sharp end of the tip. The calculations assume a transversely isotropic medium. Two complementary approaches have been taken, firstly the discretization of the equations of motion on a 1000×1000 mesh and solution using the commercial FE package ABAQUS, and secondly an analytical approach based on the angular spectrum method and stationary phase approximation. A high degree of consistency is achieved between the two approaches regarding the characteristics of the focal region, dispersion of the pulse attendant on the discretization of the system, and other features of the wave field. With the combination of the two approaches we are able to model the wave field over a very wide range of frequencies from low frequencies, where advantage lies with the FE method, to high frequencies where the computational cost of the FE method is inordinate and the analytical approach becomes progressively more accurate." @default.
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- W2045586144 date "2011-01-01" @default.
- W2045586144 modified "2023-10-10" @default.
- W2045586144 title "ULTRASONIC WAVE FIELD MODELING IN A CONICAL SCANNING PROBE TIP" @default.
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- W2045586144 doi "https://doi.org/10.1063/1.3591925" @default.
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