Beceyro Ferrán, Agustín (2019) Diseño conceptual y estimación de performance del difractómetro de neutrones ANDES para el estudio de muestras en polvo / Conceptual desing and performance estimation of ANDES neutron diffractometer for powder diffraction. Maestría en Ingeniería, Universidad Nacional de Cuyo, Instituto Balseiro.
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Resumen en español
Aquí se presenta el diseño de la óptica neutrónica para el difractometro multiprop ósito ANDES. Este trabajo se ve motivado por la construcción del reactor RA-10 en el Centro Atómico Ezeiza y el LAHN - Laboratorio Argentino de Haces de Neutrones, que permitirá explotar los haces de neutrones provistos por el reactor para investigación básica y aplicaciones tecnológicas. El proceso de diseño involucro un análisis de las técnicas analíticas que la comunidad científica local desea emplear, y la identificación de los requerimientos instrumentales que permitan llevar adelante dichas técnicas. En base a un revelamiento de instrumentos de otros laboratorios y a un estudio de la óptica neutrónica, se propusieron tres configuraciones preliminares capaces de desarrollar un amplio abanico de técnicas. En segunda instancia, se abordo la optimización de cada configuración. En este campo se realizo un estudio bibliográfico mas profundo de los modelos analíticos disponibles y se propuso la inclusión de nuevos parámetros a la metodologa. En particular se contemplaron los efectos cristalográficos del monocromador, la eficiencia de la fuente y del detector. Por otro lado, se encaro el estudio y aprendizaje del software McStas. Como parte del proceso de validación del código, se simularon diversas geometrías instrumentales basadas en modelos analíticos y también en el instrumento de referencia Stress-Spec. Luego, se utilizo esta herramienta para evaluar las configuraciones de ANDES. Como resultado de este proceso, se obtuvo un difractómetro con diseño modular que permitirá desarrollar una variedad de técnicas de difracción con una performance comparable a la de otros instrumentos de laboratorios reconocidos.
Resumen en inglés
This work approaches the design of ANDES neutron optics, a multi-purpose diffractometer of the Argentinean Neutron Beam Laboratory - LAHN. This facility will be placed in the Ezeiza Atomic Center and the neutron source will be the RA-10 research reactor. LAHN will allow the exploitation of its neutron beams for basic research and technological applications. The design process involved an analysis of the diffraction techniques that the local scientic community wishes to employ and the identication of the instrumental requirements that allow these techniques to be carried out. Based on a survey of instruments from other laboratories and a study of neutron optics, three preliminary configurations capable of developing a wide range of techniques, were proposed. Later, the optimization of each configuration was addressed. A more in-depth bibliographical study of the analytical models available was carried out and the inclusion of new parameters to the methodology was proposed. In particular, the crystallographic effects of the monochromator and the source and detector efficiency. Also, the implementation of McStas was addressed. As part of the validation process, various instrumental geometries based on analytic models were simulated. The instrument Stress-Spec was also modeled to contrast simulated and experimental data. Then, this tool was used to evaluate the ANDES configurations. As a result of this process, a diffractometer with a modular design was obtained. ANDES will be capable of carrying out a variety of diffraction techniques with performance comparable to that of other instruments of reknown laboratories.
| Tipo de objeto: | Tesis (Maestría en Ingeniería) |
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| Palabras Clave: | Diffraction; Difracción; Diffractometer; Difractrometro; Neutrons; Neutrones; [ANDES; Neutron optics; Óptica neutrónica; LAHN] |
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| Materias: | Ingeniería > Optica de neutrones > Difracción de neutrones Ingeniería > Optica de neutrones |
| Divisiones: | Gcia. de área de Energía Nuclear > Gcia. de Ingeniería Nuclear > Física de neutrones |
| Código ID: | 803 |
| Depositado Por: | Tamara Cárcamo |
| Depositado En: | 09 Abr 2021 10:06 |
| Última Modificación: | 16 Abr 2021 09:25 |
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