MANU-2: A second generation experiment for calorimetric neutrino mass determination with superconducting Re

The calorimetric determination of the neutrino mass by means of cryogenic detectors could play a significant role, being in principle able to investigate the 10−1 eV/c2 region. But the question if the developments in this new technique will allow verify the expected performances is still open. A step forward in the advancement of this technology is represented by the incoming second-generation experiment on the β-decay of Re187 with superconducting rhenium, microcalorimeters, MANU-2. It is expected that this new experiment with about 300 detectors will achieve a sensitivity of 1.5 eV/c2 (90% CL), in 1 yr, that allow to cover or improve the present best limit from tritium beta spectroscopy.