{"id":2363,"date":"2017-04-03T09:30:55","date_gmt":"2017-04-03T09:30:55","guid":{"rendered":"http:\/\/www.jeannedarc-figeac.fr\/college-lycee\/?p=2363"},"modified":"2017-04-03T09:30:55","modified_gmt":"2017-04-03T09:30:55","slug":"1eres-s-visite-cea-de-gramat","status":"publish","type":"post","link":"https:\/\/www.jeannedarc-figeac.fr\/college-lycee\/1eres-s-visite-cea-de-gramat\/","title":{"rendered":"Les 1\u00e8res S en visite au CEA  de Gramat"},"content":{"rendered":"<p><strong><span style=\"color: #0000ff\"><a href=\"https:\/\/i0.wp.com\/www.jeannedarc-figeac.fr\/college-lycee\/wp-content\/uploads\/sites\/5\/2017\/04\/unnamed.jpg\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-2364\" src=\"https:\/\/i0.wp.com\/www.jeannedarc-figeac.fr\/college-lycee\/wp-content\/uploads\/sites\/5\/2017\/04\/unnamed.jpg?resize=300%2C170\" alt=\"\" width=\"300\" height=\"170\" srcset=\"https:\/\/i0.wp.com\/www.jeannedarc-figeac.fr\/college-lycee\/wp-content\/uploads\/sites\/5\/2017\/04\/unnamed.jpg?resize=300%2C170&amp;ssl=1 300w, https:\/\/i0.wp.com\/www.jeannedarc-figeac.fr\/college-lycee\/wp-content\/uploads\/sites\/5\/2017\/04\/unnamed.jpg?resize=768%2C436&amp;ssl=1 768w, https:\/\/i0.wp.com\/www.jeannedarc-figeac.fr\/college-lycee\/wp-content\/uploads\/sites\/5\/2017\/04\/unnamed.jpg?w=800&amp;ssl=1 800w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a><a href=\"https:\/\/i0.wp.com\/www.jeannedarc-figeac.fr\/college-lycee\/wp-content\/uploads\/sites\/5\/2017\/04\/photo1.jpg\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-2365\" src=\"https:\/\/i0.wp.com\/www.jeannedarc-figeac.fr\/college-lycee\/wp-content\/uploads\/sites\/5\/2017\/04\/photo1.jpg?resize=300%2C205\" alt=\"\" width=\"300\" height=\"205\" srcset=\"https:\/\/i0.wp.com\/www.jeannedarc-figeac.fr\/college-lycee\/wp-content\/uploads\/sites\/5\/2017\/04\/photo1.jpg?resize=300%2C205&amp;ssl=1 300w, https:\/\/i0.wp.com\/www.jeannedarc-figeac.fr\/college-lycee\/wp-content\/uploads\/sites\/5\/2017\/04\/photo1.jpg?resize=768%2C524&amp;ssl=1 768w, https:\/\/i0.wp.com\/www.jeannedarc-figeac.fr\/college-lycee\/wp-content\/uploads\/sites\/5\/2017\/04\/photo1.jpg?w=800&amp;ssl=1 800w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a><\/span><\/strong><\/p>\n<p>Vendredi 3 mars, les \u00e9l\u00e8ves de 1<sup>\u00e8re<\/sup> S ont visit\u00e9 le site du Commissariat \u00e0 l\u2019Energie Atomique de Gramat. Apr\u00e8s une collation tr\u00e8s appr\u00e9ci\u00e9e, nos \u00e9l\u00e8ves ont assist\u00e9 \u00e0 une courte pr\u00e9sentation de cette institution et de ses diff\u00e9rentes antennes sur le territoire national par M. Puech. Ils ont ainsi pu prendre la mesure de la grande diversit\u00e9 des travaux et des recherches effectu\u00e9es au sein du C.E.A. et des nombreuses applications qui en d\u00e9coulent dans leur vie quotidienne.<\/p>\n<p>Les \u00e9l\u00e8ves, guid\u00e9s tout au long de cette journ\u00e9e par Mme Guyot, ont visit\u00e9 certaines installations d\u00e9di\u00e9es \u00e0 l\u2019\u00e9tude des effets des ondes \u00e9lectromagn\u00e9tiques produites lors d\u2019explosions nucl\u00e9aires. La diff\u00e9rence d\u2019\u00e9chelle entre les montages de laboratoire \u00e9tudi\u00e9s en cours et les installations de plusieurs dizaines de m\u00e8tres utilis\u00e9es par M. Saurin \u00e0 Gramat fut d\u00e9routante. M. Tortel nous a accueillis sur le site M\u00e9lusine, extraordinaire tunnel d\u2019une centaine de m\u00e8tres transform\u00e9 en v\u00e9ritable chambre an\u00e9cho\u00efque g\u00e9ante, o\u00f9 sont employ\u00e9s des micro-ondes forte puissance afin de tester la vuln\u00e9rabilit\u00e9 de certains mat\u00e9riels militaires face aux agressions \u00e9lectromagn\u00e9tiques et de trouver les moyens de s\u2019en prot\u00e9ger. Enfin, M. Jaget nous a pr\u00e9sent\u00e9 un laboratoire de d\u00e9tonique dans lequel des projectiles d\u2019acier sont propuls\u00e9s \u00e0 des vitesses avoisinant les 900 m\/s (2,5 fois la vitesse du son\u00a0!) sur des mat\u00e9riaux de blindage militaire, le tout sous les yeux de cam\u00e9ras haute-vitesse et de rayons X. Il s\u2019agit d\u2019un syst\u00e8me unique de tubes et de chambres de plus de 30 m\u00e8tres de long dont l\u2019alignement se doit d\u2019\u00eatre absolument parfait\u00a0: un v\u00e9ritable exploit\u00a0!<\/p>\n<p>Les \u00e9l\u00e8ves furent ravis de cette visite, et leur professeur extr\u00eamement jaloux de quelques \u00e9quipements employ\u00e9s.<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Vendredi 3 mars, les \u00e9l\u00e8ves de 1\u00e8re S ont visit\u00e9 le site du Commissariat \u00e0 l\u2019Energie Atomique de Gramat. Apr\u00e8s une collation tr\u00e8s appr\u00e9ci\u00e9e, nos \u00e9l\u00e8ves ont assist\u00e9 \u00e0 une courte pr\u00e9sentation de cette institution et de ses diff\u00e9rentes antennes sur le territoire national par M. Puech. Ils ont ainsi pu prendre la mesure de [&hellip;]<\/p>\n","protected":false},"author":12,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"iawp_total_views":7,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[28],"tags":[],"class_list":["post-2363","post","type-post","status-publish","format-standard","hentry","category-actus"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Les 1\u00e8res S en visite au CEA de Gramat<\/title>\n<meta name=\"description\" content=\"Vendredi 3 mars, les \u00e9l\u00e8ves de 1\u00e8re S ont visit\u00e9 le site du Commissariat \u00e0 l\u2019Energie Atomique de Gramat. 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