Outreach events

Presentation de la physique des particules et des recherches au CERN.

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Quand l'énergie devient matière.

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An exhibition on the life and work of Werner Heisenberg is on display in the Main Building (Mezzanine) at CERN until 30 July*. A related celebration will take place on Thursday 18 July. After an introduction from the Director-General Luciano Maiani, it will include reminiscences on Heisenberg's life and work. – Luciano Maiani: introduction. – Valentin Telegdi (CERN): an overview of his work. – Helmut Rechenberg (MPI für Physik, Munich): Heisenberg, particle physics and the creation of CERN. – Barbara Blum (Heisenberg's daughter): Personal reminiscences. The talks will be followed by an aperitif on the Mezzanine. The event will be webcast live.

Sergei Ivanovitch Vavilov (1891-1951) was an outstanding Russian physicist and President of the USSR Academy of Sciences. His life is of interest not only for the history of physics but also for the history of Soviet Society. He conducted fundamental research in physical optics and luminescence. His most famous results were his discoveries of the non-linear optical effect in 1926, and of the Vavilov-Cerenkov radiation in 1934. In 1932 he was appointed Head of Research at the State Optics Institute (GOI) in Leningrad. In 1934 he became the founder and first director of the Lebedev Institute of Physics (FIAN) in Moscow.S.I.Vavilov made colossal contribution to the progress of research and to the growth of both institutes. GOI was instrumental in the emergence of an advanced optics industry in Russia, where no optical engineering had ever existed. Under S.Vavilov's leadership, FIAN grew out of a small laboratory to become the multidisciplinary institution, which is today. S.Vavilov made great contribution to the development of nuclear and cosmic ray physics. In July 1945 S.I.Vavilov was elected President of the USSR Academy of Sciences. While he was president, until 1951, he accomplished much to foster science in Russia: the laboratories were better supplied with equipment, the salaries of the researchers were much increased, the number of the scientific publications was multiplied tremendously. Vavilov was also concerned with the general issues of national science administration, the development of higher education, practical applications of the knowledge gained from fundamental research, and the broad cultural progress of the nation. Unfortunately his heavy administrative responsibilities did not leave him enough time to pursue his own research objectives. Vavilov could not behave otherwise, though: he was a man of integrity, and his own interests were never his primary concern. Acting as President of the Academy under the brutal dictatorial regime of Stalin was the source of an appalling stress. With his Eldest brother (the biologist Nikolai Vavilov ) having been murdered by this regime, Vavilov's health was seriously damaged, and he died two months before his sixtieth birthday. The talk will review S.I.Vavilov's very rich life and presents the still poorly known history of the discovery of the Cerenkov effect.

De la physique a l'imagerie medicale.

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Le temps : notion difficile à définir. Au premier abord, elle semble pourtant simple, mais après analyse, il apparaît qu'elle est plutôt compliquée. Elle est emplie d'ambivalences, associée à des images parfois floues. D'abord, le temps, existe-t-il vraiment ? Ne s'agit-il pas plutôt d'une illusion ? Au cours… du temps, les philosophes ont invoqué à peu près autant d'arguments pour prétendre que le temps existe que pour prétendre qu'il n'existe pas. Mais dans cette affaire, la physique a-t-elle quelque chose à dire ? Et si oui, quoi ?.

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Chaque seconde, ce sont plus de dix milliards de tonnes d'antimatière qui s'annihilent au cœur de notre galaxie, la Voie lactée ! Ce phénomène surprenant a été enregistré par des télescopes montés à bord du satellite INTEGRAL, le dernier des grands observatoires spatiaux de l'Agence Spatiale Européenne. Astroparticule, annihilation électron-positon, bulbe galactique et matière noire illustreront, au cours de cette soirée, la forte liaison existant entre l'astronomie et de la physique des particules..

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Le CERN, le plus grand centre en physique des particules au monde, va mettre en service le Grand collisionneur de hadrons (Large Hadron Collider), le LHC. Cette machine, le plus grand rouage du complexe d'accélérateurs du CERN, doit répondre aux énigmes qui subsistent sur les briques élémentaires de la matière et l'histoire de l'Univers..

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Dans les années 80, le CERN a vécu la formidable aventure de la construction du tunnel de 27 kilomètres de circonférence. Ces dernières années, les équipes du génie civil se sont lancées dans l'excavation d'immenses cavernes souterraines et de kilomètres de galeries pour le LHC. Ces travaux ont exigé de véritables prouesses techniques..

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Le LHC accélérera des faisceaux de particules à une vitesse proche de celle de la lumière. Pour courber leur trajectoire le long de l'anneau, la plus grande installation supraconductrice au monde sera mise en service. Le LHC bénéficie ainsi de technologies de pointe en matière de supraconductivité et de cryogénie..

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Opening of the Genoa Science Festival.

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