Abstract
OPERA is a unique experiment aimed at the first detection of ντ appearance in a flux of νμ due to the neutrino oscillation from νμ to ντ. The CERN CNGS beam is the source of νμ. The detector is hybrid; it is composed of nuclear emulsion films and electronic detectors. It is located in the LNGS underground laboratory. The target consists of 150,000 Emulsion Cloud Chambers (ECC) bricks, which are stacks of interleaved emulsion films and lead plates. The ντ charged current interactions will be detected by identifying the decay topology of the τ in the ECC bricks. The first run started in 2008. The experiment is currently in the phase of data taking and analysis. The experimental methods, the status and the summary of the results from the 2008 run are presented in this paper.
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