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Showing 1 to 7 of 7 for “"paraxial approximation"”.
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Studies of Coherent Synchrotron Radiation with the Discontinuous Galerkin Method
… equations in the frequency-domain using a paraxial approximation which reduces Maxwell's equations to a Schrödinger-like system. We also evolve Maxwell's equations in the time-domain using a Fourier series decomposition with 2D DG motivated by an experiment performed at the Canadian …
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Thermal equilibrium theory of periodically focused charged-particle beams
… the thermal beam equilibria are discussed for paraxial beams in periodic solenoidal and quadrupole magnetic focusing fields, and the theory is compared with the experimental measurements. A warm-fluid equilibrium theory for a thermal beam in a periodic solenoidal focusing field is presented. …
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Probing Random Media With Singular Waves
… angular momentum (OAM) of a photon. Under the paraxial approximation appropriate for the case of beam propagation, the two terms do not couple. However, each of them can be modified by the interaction with different media in which the light propagates through processes which involve angular …
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The Design and Optimisation of Quasioptical Telescopes
… systems can be analysed accurately using the paraxial approximation, Gaussian Beam Mode Analysis can be used to simulate the field, and is the main analytical tool used here. Methods of beam shaping are investigated to gain an insight into how coupling may be increased in these systems, and …
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Finite Ion Temperature, Plasma Rotation, and Electromagnetic Effects on Plasma Acceleration in the Magnetic Mirror Geometry
… was studied using a quasi-2D model in the paraxial approximation in which the effects of the radial magnetic field Br were considered up to first order. In this approximation, the general two-dimensional nonlinear equations for the axisymmetric equilibria with flow are reduced to a set of …
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Návrh projektorové soustavy transmisního elektronového mikroskopu pro metodu Single Particle Analysis
Předkládaná práce se zabývá návrhem projektorové soustavy transmisního elektronového mikroskopu (TEM) pro metodu single particle analysis (SPA). Návrh projektorové soustavy byl vytvořen v programu Electron Optical Design (EOD) verze 4.020. Série buzení jednotlivých čoček pro zvětšení projektorové …
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Modeling the interaction of light with photonic structures by direct numerical solution of Maxwell's equations
… around a scatterer. Gaussian beams in the paraxial approximation are also slightly treated, along with their focalization by means of an approximated diraction formula useful for their numericall FDTD representation. Finally, a thorough description of planarly multilayered media is …