Abstract
The SuperNEMO experiment will study 82Se to look for neutrinoless double beta decays (0νββ), proof of the Majorana nature of neutrinos. SuperNEMO inherits the tracking-calorimetry technique of NEMO-3, allowing for a clear determination of event kinematics, while aiming for an improved background suppression and 0νββ sensitivity. A demonstrator module is currently starting operation. The ββ emitting source, ∼7 kg of 82Se in thin foils, is surrounded by a 0.5 meter long helium tracking chamber with 2000 Geiger cells. A 4π gamma catcher and electron calorimeter, made of plastic scintillators with an energy resolution of 7.8% (FWHM) at 1 MeV, surrounds the tracker. The ultra low radioactivity demonstrator is constructed and installed in the Modane Underground Laboratory in the Frejus Tunnel under the French–Italian Alps.
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