@article{oai:nagoya.repo.nii.ac.jp:00010192, author = {NAKAMURA, M.}, issue = {1}, journal = {AIP Conference Proceedings}, month = {Feb}, note = {OPERA is a long base-line neutrino oscillation experiment to detect tau-neutrino appearance and to prove that the origin of the atmospheric muon neutrino deficit observed by Kamiokande is the neutrino oscillation. A Hybrid emulsion detector, of which weight is about 1.3 kton, has been installed in Gran Sasso laboratory. New muon neutrino beam line, CNGS, has been constructed at CERN to send neutrinos to Gran Sasso, 730 km apart from CERN. In 2006, first neutrinos were sent from CERN to LNGS and were detected by the OPERA detector successfully as planned.}, pages = {26--28}, title = {OPERA -First Beam Results-}, volume = {981}, year = {2008} }