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Time-resolved imaging of electron beam powder bed fusion using an X-ray microscope optimized for white beam radiation. [PDF]
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Beam Criterion for Atmospheric Propagation
Frontiers in Optics 2007/Laser Science XXIII/Organic Materials and Devices for Displays and Energy Conversion, 2007A criterion is introduced for testing whether a beam retains its beam-like form after it propagates any particular distance through the turbulent atmosphere. The criterion applies to monochromatic as well as to partially coherent beams and is illustrated by examples.
Korotkova, Olga, Wolf, Emil
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Beam propagation in the paraxial approximation
Applied Scientific Research, 1983We present a new method for studying the propagation of beams in the paraxial approximation.
Reynaldo Castillo, A. K. Ghatak, H. Hora
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Propagation of apertured Bessel beams
Applied Optics, 1995The propagation features of several apertured Bessel beams are numerically calculated. The calculations show that the relations of axial intensity versus propagation distance are similar to the radial distribution of the aperture functions, which may be helpful in choosing the proper aperture functions in experiments.
Z, Jiang, Q, Lu, Z, Liu
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Optics Letters, 1996
A new beam-propagation scheme based on a finite-difference algorithm is proposed. The main property of this scheme is to avoid the boundary conditions altogether, by mapping the infinite space onto a finite-size domain. This mapping, together with a rescaling of the field, leads to a fast and easy-to-implement algorithm that can be used when boundary ...
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A new beam-propagation scheme based on a finite-difference algorithm is proposed. The main property of this scheme is to avoid the boundary conditions altogether, by mapping the infinite space onto a finite-size domain. This mapping, together with a rescaling of the field, leads to a fast and easy-to-implement algorithm that can be used when boundary ...
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Beam propagation factor of an Airy beam
Journal of Optics, 2011We investigate the beam quality features of an Airy beam during propagation in free space. The beam propagation factor of an Airy beam is derived based on the moments method. The results show that the beam propagation factor of an Airy beam can achieve the minimum M2 = 1.17 when the modulation parameter a = 0.756 by compromising the effects of lateral ...
Rui-Pin Chen, Chao-Fu Ying
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Focusing and propagation of proton beam
AIP Conference Proceedings, 1992It is the aim of this paper to design a fusion power plant whose electric output power is 1GW, and to find a way for breaking through fusion technically and energy-economically. Proton beams, whose total energy is 12MJ, pulse width is 30ns and beam number is 6, are chosen here as the energy driver.
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Characteristics of a Propagating Gaussian Beam
Applied Optics, 1970From diffraction theory, an expression is derived for the radius of a gaussian beam, in an output plane of a single lens, on-axis optical system, as a function of input waist radius, lens focal length, input waist to lens spacing, and lens to output plane spacing. Several special cases are discussed and plots of the important cases are included.
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Observations of beam propagation
Solar Physics, 1990We discuss the observational evidence for propagating electron distributions in the solar corona as obtained from type III observations. The location of the beam acceleration region together with the effects of the ambient medium on beam propagation are discussed in the framework of recent observational and theoretical developments.
M. Pick, G. H. J. Van Den Oord
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