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Neutrons have always been produced by spallation reactions with the high energy beams hitting various targets at CERN, but it was not before 2000 that neutrons were produced on purpose for experiments related to problems in nuclear astrophysics and technology. Initiated by Carlo Rubbia and his colleagues [1] and supported as a European project [2] the construction of n_TOF facility started in 2000. In parallel, the n_TOF Collaboration was established with about 120 participants from more than 30 institutes, mostly from the EU, but also from the United States and Russia, to build the experimental equipment for neutron cross-section measurements and to prepare the first measurement campaign from 2002 to 2004. The main goal of the n_TOF project was “to produce, evaluate and disseminate cost-effectively neutron induced reaction cross sections for isotopes relevant to the Stellar Nucleosynthesis, to Nuclear Physics and to the concept for an Accelerator Driven System. In total, 40 fission and capture cross-sections in the mass range between 24Mg and 245Cm have been successfully measured during the first campaign. Presently, the n_TOF Collaboration is preparing for the second campaign 2009-2012 after the facility was refurbished and after a new spallation target has been installed. [ABSTRACT FROM AUTHOR]