{"id":85929,"date":"2018-03-10T00:10:25","date_gmt":"2018-03-10T00:10:25","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/reflectometria-de-microondas-como-diagnostico-de-turbulencia-en-plasmas-confinados-magneticamente\/"},"modified":"2018-03-10T00:10:25","modified_gmt":"2018-03-10T00:10:25","slug":"reflectometria-de-microondas-como-diagnostico-de-turbulencia-en-plasmas-confinados-magneticamente","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/fisica\/reflectometria-de-microondas-como-diagnostico-de-turbulencia-en-plasmas-confinados-magneticamente\/","title":{"rendered":"Reflectometr\u00eda de microondas como diagnostico de turbulencia en plasmas confinados magneticamente"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Beatriz Bra\u00f1as Lasala <\/strong><\/h2>\n<p>El conocimiento de la turbulencia existente en plasmas calientes, necesarios para obtener energia mediante reacciones de fusi\u00f3n nuclear, tiene gran inter\u00e9s, pues limita el confinamiento de estos plasmas. En este trabajo de investigaci\u00f3n se analiza la capacidad del diagn\u00f3stico de reflectometr\u00eda de microondas para medir fluctuaciones de densidad en plasmas confinados magn\u00e9ticamente. Para ello se han realizado medias con un reflect\u00f3metro bicanal con detecci\u00f3n homodina en el tokamak tj-1(Madrid) y con un reflect\u00f3metro con detecci\u00f3n heterodina en el stellarator wendelstein 7-as (garching, alemania) as\u00ed como simulaciones num\u00e9ricas. Se concluye que, en la mayor parte de los plasmas estudiados, la interpretaci\u00f3n unidimensional del diagn\u00f3stico es insuficiente, pues la medida se ve afectada por la estructura espacial de la turbulencia en direcci\u00f3n transversal el haz de micrrondas. Una consecuencia directa de la existencia de esta estructura es el fen\u00f3meno denominado \u00abderiva de fase\u00bb, que se estudia en detalle mediante experimentos especialmente dise\u00f1ados y simulaciones, dilucidando sus causas. De las simulaciones se deducen unos criterios para distinguir cuando la interpretaci\u00f3n simple unidimensional de las medidas es v\u00e1lida. Por \u00faltimo, en los casos en que es posible, se cuantifica el nivel de turbulencia de densidad as\u00ed como su composici\u00f3n espectral en los plasmas de wendelstein 7-as.<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Reflectometr\u00eda de microondas como diagnostico de turbulencia en plasmas confinados magneticamente<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Reflectometr\u00eda de microondas como diagnostico de turbulencia en plasmas confinados magneticamente <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Beatriz Bra\u00f1as Lasala <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Polit\u00e9cnica de Madrid<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 13\/07\/2000<\/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>Joaquin Sanchez Sanz<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal:  Sanchez perez angel M\u00aa <\/li>\n<li>ernesto Anabitarte cano (vocal)<\/li>\n<li>Carlos Alejaldre losilla (vocal)<\/li>\n<li>Luis Garcia gonzalo (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Beatriz Bra\u00f1as Lasala El conocimiento de la turbulencia existente en plasmas calientes, necesarios para obtener energia mediante [&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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