  The dark matter directional detection opens a new field in cosmology bringing
the possibility to build a map of nuclear recoils that would be able to explore
the galactic dark matter halo giving access to a particle characterization of
such matter and the shape of the halo. The MIMAC (MIcro-tpc MAtrix of Chambers)
collaboration has developed in the last years an original prototype detector
based on the direct coupling of large pixelized micromegas with a devoted fast
self-triggered electronics showing the feasibility of a new generation of
directional detectors. The discovery potential of this search strategy is
discussed and illustrated. In June 2012, the first bi-chamber prototype has
been installed at Modane Underground Laboratory (LSM) and the first underground
background events, the gain stability and calibration are shown.
