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The Large Hadron Collider

The Development of the Project

As early as 1977, during preparatory discussions for building CERN1's Large Electron Positron collider (LEP), it was clear that excavating the LEP tunnel would make more economic sense if it could be reused for a successor machine. Thus, while LEP was being designed and built in the early '80s, groups in CERN were busy looking at the longer term future.

LHC the Physics

Physics for the 21st Century

On 24 June 1994, delegates representing CERN1's 19 European Member States will decide whether to approve the construction of the Large Hadron Collider (LHC), a huge scientific instrument which will propel particle physics research way into the 21st century.

The LHC, A world project

Since the mid-1980s the number of scientists from all over the world using CERN1's facilities has increased enormously. Currently more than 6,000 users, over half of the planet's high-energy physicists, carry out fundamental research at CERN. This user community is living proof that CERN welcomes inter- regional collaboration which benefits all and boosts the progress of science. The LHC, the only machine capable of addressing problems way beyond today's frontiers of high energy physics, offers an unique opportunity for extending world wide collaboration.

The LHC, the technological challenge

Physicists at CERN1 talk almost casually about recreating conditions that existed only 10-12 second - a millionth of a millionth of a second - after the 'Big Bang', when our Universe might have been no bigger than a pinhead! This is however exactly what the high energy proton-proton collisions in the Large Hadron Collider (LHC) will do. To build instruments capable of creating such extreme conditions and then analysing the results with extraordinary precision is a daunting challenge which demands advances in many highly complex technologies.

First International Conference on the World-Wide Web

World-Wide Web is the world's most powerful networked information system. It was originally conceived and developed at CERN1, where large high-energy physics collaborations created a demand for instantaneous information sharing between physicists working in different universities and institutes all over the world. Now it has millions of academic and commercial users.


On Friday, 22 April, a new science exhibition "Infinitos" illustrating man's current understanding of how the Universe works - from the tiniest structures of matter to the most far flung galaxies - will be inaugurated at the Museu de Electricidade in Lisbon by the President of Lisboa '94, Prof. Vitor Constancio, the Portuguese Science Minister, Prof. L. Valente de Oliveira, Prof. C. Llewellyn-Smith, Director General of CERN1 and Dr. P. Creola, President of ESO2 Council.

CERN Member States prepare for a decision on the Large Hadron Collider in June 1994

The CERN1 Council, where the representatives of the 19 Member States of the Organization decide on scientific programmes and financial resources, held its 99th session on 15 April under the chairmanship of Prof Hubert Curien (France).

Council votes overwhelmingly for resolution in support of LHC

Council delegates voted overwhelmingly - 18 Member States for, one abstention - to adopt the following resolution on the Large Hadron Collider (LHC) and CERN's long-term scientific programme.

Italian Minister of Science opens industrial exhibition at CERN

On 30 November 1993 His Excellency Professor Umberto Colombo, Italy's Minister for Universities and Research opened the sixth "Italy at CERN" exhibition. The Minister was accompanied by His Excellency the Ambassador Giulio di Lorenzo Badia, Permanent Representative of Italy to the International Organizations in Geneva. CERN1's Director-General, Prof.

Russian Agreement with CERN

On the occasion of the bi-annual meeting of the CERN1 -Russia Committee, under the co-chairmanship of Minister Boris Saltykov and CERN's Director-General, Professor Carlo Rubbia, a new Scientific and Technological Cooperation Agreement was formally signed on 30th October in the laboratories of the Institute for High Energy Physics (I.H.E.P.) in Protvino, near Moscow.


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