{"id":19292,"date":"2025-09-02T16:08:38","date_gmt":"2025-09-02T14:08:38","guid":{"rendered":"https:\/\/amplitude-laser.com\/applications\/%application_category%\/plasma-diagnostics\/"},"modified":"2025-09-03T15:43:09","modified_gmt":"2025-09-03T13:43:09","slug":"diagnostic-plasma","status":"publish","type":"application","link":"https:\/\/amplitude-laser.com\/fr\/applications\/science-fr\/diagnostic-plasma\/","title":{"rendered":"Diagnostic plasma"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">Diagnostic de combustion : diffusion Rayleigh et Raman<\/h2>\n\n\n\n<p>Les techniques de diffusion Rayleigh et Raman utilisent la lumi\u00e8re laser pour \u00e9tudier les processus de combustion. Le signal diffus\u00e9 fournit des informations sur la composition mol\u00e9culaire, la temp\u00e9rature et les propri\u00e9t\u00e9s d&rsquo;\u00e9coulement, permettant ainsi une analyse d\u00e9taill\u00e9e de la dynamique de combustion.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Diffusion Thomson pour le diagnostic du plasma<\/h2>\n\n\n\n<p>Le plasma est un \u00e9tat de la mati\u00e8re caract\u00e9ris\u00e9 par la pr\u00e9sence d&rsquo;une proportion importante de particules charg\u00e9es, sous forme d&rsquo;ions ou d&rsquo;\u00e9lectrons. Il est principalement caract\u00e9ris\u00e9 par la densit\u00e9, la temp\u00e9rature et la distribution dans l&rsquo;espace de chaque particule charg\u00e9e composant le plasma.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Diagnostic du plasma : diffusion Thomson<\/h2>\n\n\n\n<p>La diffusion Thomson consiste \u00e0 \u00e9clairer un plasma avec un laser et \u00e0 analyser la lumi\u00e8re diffus\u00e9e afin de d\u00e9terminer la temp\u00e9rature et la densit\u00e9 des \u00e9lectrons.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Diagnostic de la structure : diffraction et absorption des rayons X<\/h2>\n\n\n\n<p>Lorsque la mati\u00e8re est plac\u00e9e dans des conditions extr\u00eames (par exemple, haute pression ou temp\u00e9rature), des sources de rayons X sont utilis\u00e9es pour analyser ses propri\u00e9t\u00e9s :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Diffraction des rayons X (XRD) : r\u00e9v\u00e8le l&rsquo;\u00e9volution structurelle du mat\u00e9riau.<\/li>\n\n\n\n<li>Spectroscopie d&rsquo;absorption des rayons X : fournit des informations sur l&rsquo;environnement atomique local. Les techniques utilis\u00e9es comprennent :<ul><li>XANES (X-ray Absorption Near Edge Structure) pour obtenir des informations sur l&rsquo;\u00e9tat \u00e9lectronique et chimique.<\/li><\/ul>\n<ul class=\"wp-block-list\">\n<li>XAFS (absorption des rayons X \u00e0 structure fine) pour des informations d\u00e9taill\u00e9es sur la structure \u00e0 l&rsquo;\u00e9chelle atomique.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<p>Les lasers ultra-rapides \u00e0 haute \u00e9nergie d&rsquo;Amplitude, des syst\u00e8mes <strong>Ti:Sapphire<\/strong> aux plateformes <strong>Ytterbium<\/strong>, offrent la stabilit\u00e9, la mise en forme des impulsions et la pr\u00e9cision n\u00e9cessaires pour r\u00e9aliser des diagnostics avanc\u00e9s dans les domaines de la science de la combustion, de la physique des plasmas et des \u00e9tudes sur les mati\u00e8res extr\u00eames.<\/p>\n","protected":false},"featured_media":6963,"template":"","application_category":[114],"class_list":["post-19292","application","type-application","status-publish","has-post-thumbnail","hentry","application_category-science-fr"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Diagnostic plasma - Amplitude<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/amplitude-laser.com\/fr\/applications\/science-fr\/diagnostic-plasma\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Diagnostic plasma - Amplitude\" \/>\n<meta property=\"og:description\" content=\"Diagnostic de combustion : diffusion Rayleigh et Raman Les techniques de diffusion Rayleigh et Raman utilisent la lumi\u00e8re laser pour \u00e9tudier les processus de combustion. Le signal diffus\u00e9 fournit des informations sur la composition mol\u00e9culaire, la temp\u00e9rature et les propri\u00e9t\u00e9s d&rsquo;\u00e9coulement, permettant ainsi une analyse d\u00e9taill\u00e9e de la dynamique de combustion. 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