Orientadores: José Antenor Pomilio, Giancarlo Tosin / Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Elétrica e de Computação / Made available in DSpace on 2018-08-27T01:27:04Z (GMT). No. of bitstreams: 1 Baader_JohannEduardo_M.pdf: 5709999 bytes, checksum: b70a7b9c4f9062486fb33d399ad88653 (MD5) Previous issue date: 2015 / Resumo: Desde 1997 o Brasil tem acesso à tecnologia de radiação síncrotron com a inauguração do Laboratório Nacional de Luz Síncrotron (LNLS), localizado na cidade de Campinas, SP. Batizada de UVX, a fonte de luz síncrotron brasileira foi um marco no desenvolvimento científico e tecnológico do país, permitindo pesquisas nas mais diversas áreas do conhecimento, como nanotecnologia, biotecnologia, fármacos, agricultura, energias alternativas, dentre outros. Em 2009 o LNLS iniciou o projeto e a construção de uma nova fonte de luz síncrotron brasileira. Nomeada Sirius, está sendo desenvolvida para ser uma das mais avançadas do mundo na geração de luz síncroton. O alto desempenho deste tipo de máquina depende fortemente da qualidade dos campos magnéticos criados pelos inúmeros magnetos que compõem a rede magnética, o que exigem uma técnica de caracterização rápida, acurada e precisa. O Grupo de Magnetos, responsável pelo projeto, construção e caracterização dos magnetos tanto da fonte UVX como da nova fonte, utiliza um sistema de medição conhecido como Técnica de Bobina Girante. Devido às especificações do projeto Sirius, foi necessário o aprimoramento da bancada de caracterização, objetivo este consolidado principalmente através da análise minuciosa das principais fontes de erro do sistema. Um modelo numérico desenvolvido para estudar algumas classes de erros da técnica deu suporte para diversas correções na bancada, o que permitiu alcançar níveis de precisão comparáveis com os sistemas de caracterização de outros laboratórios. Paralelamente, foi construída a bancada de um sistema protótipo de medição magnético, nomeado Técnica de Minibobina Girante, apresentando uma série de vantagens em relação às limitações da bancada oficial. Algumas das melhorias realizadas nesta bancada durante o seu desenvolvimento foram baseadas nos resultados advindos do modelo numérico das fontes de erros / Abstract: Since 1997 Brazil has access to synchrotron radiation technology with the inauguration of the Brazilian Synchrotron Light Source (LNLS), located in Campinas, Brazil. The source of Brazilian synchrotron light known as UVX was a milestone in scientific and technological development of the country, enabling research in several areas of knowledge such as nanotechnology, biotechnology, pharmaceuticals, agriculture, alternative energy etc. In 2009 LNLS initiated the project and the construction of a new source of Brazilian synchrotron light, named Sirius. It is being developed to be one of the most advanced in the world in the generation of synchrotron light. The high performance of this type of machine depends strongly on the quality of the magnetic fields created by magnets that compose the lattice, which demand a fast, accurate and precise characterization technique. The Magnets Group, responsible for the design, construction and characterization of both the magnetic UVX sources as new sources, uses a measuring system known as Rotating Coil System. Due to the specifications of the Sirius design, an improved characterization bench was necessary. This goal was achieved mainly through a careful analysis of the main sources of error in the system. A numerical model to study some classes of errors in the technique provided support for various fixes in the bench, which allowed us to achieve comparable levels of accuracy along with the characteristics of the systems from other laboratories. At the same time, another bench was built as a prototype system for magnetic measurements known as Small Rotating Coil System, presenting a series of advantages over the constraints of the main bench. Some of the improvements made on this bench during its development were based on the results derived from the numerical model of error sources / Mestrado / Energia Eletrica / Mestre em Engenharia Elétrica

The X-ray optics of synchrotron radiation beamlines are considered in this paper. The characteristics of synchrotron radiation which make it the premier source of light for studies in many regions of the electromagnetic spectrum are given. A chapter is devoted to the collimating, focusing and monochromating optics of two X-ray diffraction beamlines at the National Synchrotron Light Source. The beamlines are operated by the Naval Research Laboratory (NRL) and the Oak Ridge National Lab (ORNL). The major optical components of these beamlines are reviewed in regards to their function and their flexibility. A detailed analysis is performed on the NRL X-ray collimating mirror. The mirror is treated as an elastically bent beam. Deflection and slope error equations are developed which relate the shape of the bent mirror to its ideal surface. Visible light diffraction patterns collected from the mirror helped to establish operating conditions which provide good collimation. When the observed patterns are wed to the theoretical calculations, estimates of the average figure error are made. Finally, the effect of a highly collimated synchrotron beam on the reproducibility of the integrated intensities from polycrystalline materials is considered. The calculations show that except for the most fine grained materials, representative intensity measurements can only be made when the sample is permitted to move. / M.S.