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Gargamelle was a giant bubble chamber detector at CERN, designed mainly for the detection of neutrino interactions. Built in France, with a diameter of nearly 2 meters and 4.8 meters in length, Gargamelle held nearly 12 cubic meters of a freon (CF3Br). The usage of a heavy liquid, rather than the more typical liquid hydrogen, meant higher neutrino interaction probability, as well as easier identification of muons versus pions. Gargamelle operated from 1970 to 1978 with a muon neutrino beam produced by the CERN Proton Synchrotron. These experiments led to one of the most important discoveries ever made at CERN: the experimental observation of the weak neutral currents was announced in July 1973,〔http://public.web.cern.ch/public/en/About/History73-en.html〕 shortly after their theoretical prediction. For the experiment, approximately 83,000 neutrino events were analysed, and 102 neutral current events observed. The signature of a neutral current event was an isolated vertex from which only hadrons were produced. The name of the chamber derives from the giantess ''Gargamelle'' in the works of François Rabelais; she was Gargantua's mother. == References == * (''The discovery of the weak neutral currents'', CERN Courier ) * (Experimental Study of the High-energy Reactions Anti-muon-neutrino e → Antu-muon-neutrino e-, Anti-muon-neutrino N → mu + X in the Gargamelle Bubble Chamber. (In French) Farhad Rahimi (Strasbourg, CRN). CRN-HE-84-13, Dec 1982. ) * (The road to unification – Gargamelle and the discovery of Weak Neutral Currents ) 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Gargamelle」の詳細全文を読む スポンサード リンク
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