CERN Networked experiments of the European Laboratory for Particle Physics (CERN) CERN provides experimental facilities for particle physics experiments, mainly in the domain of high-energy physics (HEP). CERN’s current major facility is the Large Electron Positron (LEP) collider in a 27-km tunnel, the largest machine of this type in the world. Four very large experiments in man-made caverns intersect the LEP tunnel, constituting about half of CERN’s total experimental program for the 1990’s. Each of the experiments is carried out by teams of several hundred of physicists from more than 50 institutes in five continents. All existing and future CERN experiments produce large amounts of data. For example, the LEP experiments generate 25 terabytes of data each year, which are stored on magnetic tape cartridges, whereas the Large Hadron Collider (LHC) experiments, expected to commence in 2005, are expected to produce several order of magnitudes more data. The sheer volume of the data combined with the complexity of the analysis to be performed, and the requirement that the processing of the data may also be done remotely, places heavy demands on the High Energy & Nuclear Physics (HENP) computing and networking infrastructure, which can only be met by using leading edge technology and services. Contact cms.outreach@cern.ch Collaborators Worldwide collaborations Argonne National Laboratory (ANL), California Institute of Technology (CalTech), Cornell University, Fermilab, Harvard University, Lawrence Berkeley National Laboratory (LBNL), Massachusetts Institute of Technology (MIT), Princeton University, ESnet USA www.cern.ch
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