This thesis describes an investigation of certain aspects of laser light beam propagation in a simulated ocean environment. The specific parameter of interest here is the angular spectrum, or angular distribution, of the received optical power after it traverses the underwater medium. Knowledge of the angular spectrum width is required by the communication engineer in order to specify the field...

Distances in cosmology are usually inferred from observed redshifts—an estimate that is dependent on the local peculiar motion—giving a distorted view of the three-dimensional structure and affecting basic observables such as the correlation function and power spectrum. We calculate the full nonlinear redshiftspace power spectrum for Gaussian fields, giving results for both the standard flat-sk...

A simple method is introduced for analyzing error score distributions from the Farnsworth-Munsell 100-Hue test. The method involves fitting a sine wave directly to the error distribution, and produces estimates of three parameters that characterize the severity of the defect, the degree of bipolarity, and the orientation of the axis of bipolarity, if one is present. The method produces good est...

We present the first measurements of the angular dependence of the betatron x-ray spectrum produced by electrons inside the cavity of a laser-wakefield accelerator. Electrons accelerated up to 300 MeV energies produce a beam of broadband, forward-directed betatron x-ray radiation extending up to 80 keV. The angular resolved spectrum from an image plate-based spectrometer with differential filte...

A compressed sensing scheme for near-field imaging of corrugations of relative sparse Fourier components is proposed. The scheme employs random sparse measurement of near field to recover the angular spectrum of the scattered field. Surprisingly, it can be shown heuristically and numerically that under the Rayleigh hypothesis the angular spectrum is compressible and amenable to compressed sensi...

62 LLE Review, Volume 78 Pulsed laser beams with two-dimensional smoothing by spectral dispersion (2-D SSD), used in inertial confinement fusion (ICF), improve the on-target uniformity on the OMEGA laser system;1–4 however, 2-D SSD is highly susceptible to significant amplitude modulation (AM) during its generation and propagation.5–8 In addition to on-target uniformity, the smoothness of the p...

We determine the angular power spectrum Cl of the Edinburgh/Durham Southern Galaxy Catalog (EDSGC) and use this statistic to constrain cosmological parameters. Our methods for determining Cl and the parameters that affect it are based on those developed for the analysis of cosmic microwave backgroundmaps. We expect them to be useful for future surveys. Assuming flat cold dark matter models with...