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1	A Neutral Beam Probe for the Helimak plasma experiment Garcia de Gorordo, Alvaro 15 July 2013 (has links) A Neutral Beam Probe (NBP) was developed for studying the Texas Helimak plasma experiment. The probe consisted of a beam of neutral sodium atoms that were injected into the magnetized plasma of the Helimak. After some fraction of the atoms underwent electron impact ionization, the resulting ion beam followed a path to an energy analyzer where the change of energy was detected along with the total ion current. The measurement of the change of energy implies a change of potential energy at the point of ionization since all the neutral beam particles enter the plasma with a well determined energy. The total current detected at the energy analyzer also implies a rate of electron impact ionization, which in turn implies an electron density and temperature. The NBP was developed based on the Elmo Bumpy Torus (EBT) Heavy Ion Beam Probe (HIBP), which was operated at Oak Ridge National Labs. In fact, the majority of the equipment that was used in this experiment was taken from that HIBP, and some of it was rebuilt. We generated an estimate of the radial electric field in the Helimak along with an estimate of density changes as a result of biasing experiments. Interestingly, when a bias voltage was applied inside the Helimak, the radial electric field did not change significantly at the sample region, but the electron density did vary. The probe data taken by the Helimak team agree with the density changes. The electric field derived from Langmuir probes is not trivial (especially in plasmas with flows) and was not computed for this thesis. / text Plasma Beam probe Neutral Beam Probe Ion gun Energy analyzer Helimak
2	Caracterização do conteúdo harmônico em ambientes residenciais: estudo de caso / Characterization of harmonic content in residential environments: case study. Carvalho, Flavio Gomes de 26 February 2015 (has links) Submitted by Maria Suzana Diniz (msuzanad@hotmail.com) on 2015-11-06T13:34:11Z No. of bitstreams: 1 arquivototal.pdf: 8252204 bytes, checksum: ee6c84ddd82f31470862718d3b1b3abc (MD5) / Made available in DSpace on 2015-11-06T13:34:11Z (GMT). No. of bitstreams: 1 arquivototal.pdf: 8252204 bytes, checksum: ee6c84ddd82f31470862718d3b1b3abc (MD5) Previous issue date: 2015-02-26 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES / In this work a characterization of harmonic content in residential electrical systems through a set of measurements over various periods of time is performed. For each reported case it was a statement of charges that make up the installation and an individual analysis of each of them as a way to assess their influence on the harmonic behavior of the installation as a whole. / Neste trabalho é realizada uma caracterização do conteúdo harmônico em instalações elétricas residenciais por meio de um conjunto de medições realizadas por diversos períodos de tempo. Para cada caso avaliado fez-se um levantamento das cargas que compõem a instalação e uma análise individual de cada uma delas como forma de avaliar sua influência no comportamento harmônico da instalação como um todo. ENGENHARIAS::ENGENHARIA ELETRICA
3	Automatic Modulation Classifier - A Blind Feature-Based Tool Cutno, Patrick 29 November 2016 (has links) No description available. Computer Science Electrical Engineering Engineering Communication Computer Engineering Experiments Technology Software Defined Radio NI USRP-2920 USRP Modulation Automatic Modulation Detection Automatic Modulation Classification AMC High Order Statistics LabVIEW Implementation Electronic Warfare Cognitive Radio AM FM PSK QAM Energy Analyzer SNR

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