{"id":65502,"date":"2018-03-09T22:53:37","date_gmt":"2018-03-09T22:53:37","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/new-methods-for-hogh-resolution-ion-beam-analysis\/"},"modified":"2018-03-09T22:53:37","modified_gmt":"2018-03-09T22:53:37","slug":"new-methods-for-hogh-resolution-ion-beam-analysis","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/procesos-de-colision\/new-methods-for-hogh-resolution-ion-beam-analysis\/","title":{"rendered":"New methods for hogh-resolution ion beam analysis"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Roch Andrzej Andrzejewski <\/strong><\/h2>\n<p>En esta tesis se han realizado varias aportaciones en el campo del an\u00e1lisis de materiales por medio de novedosas t\u00e9cnicas basadas en el empleo de haces de iones. En primer lugar se ha dise\u00f1ado y construido un espectr\u00f3grafo magn\u00e9tico de alta resoluci\u00f3n con caracrter\u00edsticas \u00fanicas en el mundo. La deflexi\u00f3n en un campo magn\u00e9tico de los iones de alta energ\u00eda dispersados o en retroceso tras su interacci\u00f3n con la materia y su detecci\u00f3n mediante la medida de su tiempo de vuelo en un gran \u00e1ngulo s\u00f3lido permitir\u00e1 el an\u00e1lisis en profundidad de la composici\u00f3n y estructura cristalina del material con una resoluci\u00f3n y una eficacia excelentes. El instrumento se encuentra instalado en el centro de microan\u00e1lisis de materiales de la universidad aut\u00f3noma de Madrid y se han realizado las primeras pruebas exitosas de funcionamiento durante el transcurso de esta tesis. Por otra parte, se ha participado en el desarrollo de un nuevo programa de simulaci\u00f3n de trayectorias de iones en la materia. Estos programas son esenciales para determinar con precisi\u00f3n la composici\u00f3n y estructura cristalina por medio de la comparaci\u00f3n con los resultados experimentales. El nuevo programa combina un tratamiento en principio exacto de la interacci\u00f3n i\u00f3n-materia con una alta eficiencia computacional y aplica novedosamente mejoras del m\u00e9todo de montecarlo (muestreo por importancia y muestreo estratificado) a este campo. Se han realizado pruebas del correcto funcionamiento del programa en distintos rangos de energ\u00eda. Finalmente, se ha aplicado el programa al caso de la interacci\u00f3n de iones de he de baja energ\u00eda con la superficie cu(100). Conjuntamente con el empleo de un modelo mejorado de la interacci\u00f3n (basado en le teor\u00eda de hartree-fock) se ha conseguido por primera vez un buen ajuste con los resultados experimentales disponibles.<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>New methods for hogh-resolution ion beam analysis<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 New methods for hogh-resolution ion beam analysis <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Roch Andrzej Andrzejewski <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Aut\u00f3noma de Madrid<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 23\/06\/2008<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3>Direcci\u00f3n y tribunal<\/h3>\n<ul>\n<li><strong>Director de la tesis<\/strong>\n<ul>\n<li>David Martin Marero<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: Jos\u00e9 manuel Mart\u00ednez duart <\/li>\n<li>gast\u00f3n Garc\u00eda l\u00f3pez (vocal)<\/li>\n<li>Antonio Rivera de mena (vocal)<\/li>\n<li>peter Bauer (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Roch Andrzej Andrzejewski En esta tesis se han realizado varias aportaciones en el campo del an\u00e1lisis de [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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