ANTARES is a European research collaboration which has constructed a neutrino telescope in the deep Mediterranean sea off the coast of southern France.
In its currently final setup, which has been completed in May 2008, the telescope consists of 12 vertical strings and an instrumentation line that are all anchored to the seabed and tightened by underwater buoys. All 12+1 lines are taking data successfully. Each of the 12 telescope strings is composed of 25 floors with 3 optical modules each and a total length of about 460 m. The detector instruments a total water volume of about 0.03 km3.
The reconstruction of neutrinos is achieved indirectly with the help of Cherenkov light, which is emitted by charged particles like electrons or muons that are created in interactions of neutrinos with nuclei in the water molecules.
Some of the physics goals of ANTARES are the measurement of the diffuse cosmic neutrino flux, the precise measurement of the angular and energy spectrum of the neutrinos, the search for cosmic point sources and the search for signals of WIMPS and other exotic particles.