962 research outputs found
Modeling of ion-implanted atoms diffusion during the epitaxial growth of the layer
The equation of impurity diffusion due to formation, migration, and
dissolution of the pairs "impurity atom - intrinsic point defect" taking into
account the nonuniform distributions of nonequilibrium point defects and drift
of the pairs in the field of elastic stresses is presented in the coordinate
system associated with the moving surface of the growing epitaxial layer. The
analytical solution of this equation for the low fluence ion implantation has
been obtained.Comment: 3 pages, 2 figure
An annular array with fiber composite microstructure for far field NDT imaging applications
This paper describes the design and fabrication of a reduced element count annular array for far field NDT imaging applications, built with a random fiber piezoelectric composite microstructure. An annular array design is considered, spatially it offers axi-symmetric layout while reducing number of array elements, which could potentially result in a significant reduction in the cost and complexity of building an ultrasonic volumetric imaging system. Modelling and preliminary experimental results are presented to evaluate the feasibility of this approach
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