  The ICARUS detector is a liquid argon time projection chamber. It provides
three dimensional imaging and calorimetry of ionizing particles over a large
volume, with high granularity. Its Physics program includes the study of
atmospheric, solar, supernovae and beam neutrinos as well as proton decay
searches. The ICARUS technology has reached maturity with the construction and
test (during summer 2001) of a 600 ton detector, demonstrating the feasibility
of building large mass devices relevant for non-accelerator physics. During
this test run, more than 27000 cosmic ray events have been acquired. These data
allow to assess the detector performance, i.e. the spatial reconstruction,
calorimetry and particle identification.
