n 1998, Super KamiokaNDE proved the oscillatory nature of neutrinos
thanks to solar and atmospheric neutrinos. Using the Cerenkov effect,
this detector of 50 000 tons of purified water can watch the "light of
the neutrinos". Neutrino interactions contained within the detector
and in the nearby rock show a deficit of muon neutrino interactions
which is consistent with nu-mu oscillation to nu-tau or nu-sterile
with maximal mixing and delta(m^2) =3.5x10^-3 (eV)^2.  Then, it has
been the target of neutrinos beams. The experiment K2K aimed it from
2003 to 2006, as T2K will from 2009. This beautiful tool for particle
physics remains nevertheless unfamiliar in its very details :- How
Super KamiokanNDE reconstructs neutrinos?- What is the difference
between a nu_mu and a nu_e interactions in it?- What are the important
parameters to monitor and calibrate? After a pedagogic introduction to
neutrino oscillation, this seminar will focuse on the experimental
aspect to expose the reconstruction performances of Super KamiokaND