The run 2 of the Tevatron

Today the particle accelerator providing the highest energies is the Tevatron, a proton-antiproton collider located at Fermilab near Chicago. Both the Fermilab accelerator complex and the CDF and DO detectors are being substantially upgraded for a new phase of operation called Run-2. This upgrading will lead to an integrated luminosity of 2 fb-1 (i.e 2000 pb-1) for Run-2a and then of more than 10 fb-1 for Run-2b. In addition to these luminosity improvements, the proton-antiproton collision energy has been increased to 1,96 TeV. The Run-2 will offer a broad range of physics opportunities: - a large sample of top quarks will be collected, - the uncertainty on the mass of the W boson will be reduced to ±30 MeV, - direct searches for phenomena beyond the standard model will be pursued, - a huge number of bottom quarks will be produced, which will allow important measurements to be performed, and - detailed studies of QCD (quantum chromodynamics) at the TeV scale will be performed. The search for the standard model Higgs boson will really need the 10 fb-1 or more anticipated for Run-2b. With such an integrated luminosity, it should possible to exclude at 95% confidence level the whole mass range suggested by LEP precision studies. (A.C.)