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Polarization of Nonlinear Thomson Scattering from a High Intensity Laser FocusPratt, Brittni Tasha 12 August 2020 (has links)
Thomson scattering from free electrons in a high-intensity laser focus has been widely studied analytically, but not many measurements of this scattering have been made. We measure polarization-resolved nonlinear Thomson scattering from electrons in a high-intensity laser focus using a parabolic mirror. The weak scattering signal is distinguished from background noise using single-photon detectors and nanosecond time-resolution to distinguish a prompt scattering signal from noise photons. The azimuthal and longitudinal components of the fundamental, second, and third harmonics were measured. Our measurements reasonably match theoretical results, but also show some asymmetry in the emission patterns.
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Problematika snižování tepelné odrazivosti zrcadel solární elektrárny se Stirlingovým motorem / Description of problems decreasing reflectivity of Stirling solar dishKmeť, Jozef January 2015 (has links)
This thesis describes a concentrating solar power using a Stirling engine. The problems encountered during construction and operation. I focus mainly on problems derating dusting and icing. The second part of this work is the experimental design of the stand with long-term measurement of dusting depending on the reflectivity of mirrors and their degradation under various conditions. First measurement is stated and estimation of long-term results.
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