  We present the BRAIN Experiment, a project of B-mode experiment using a novel
technology, bolometric interferometry. This technique is a promising
alternative to direct imaging experiments since it combines the advantages of
interferometry in terms of systematic effects handling and those of bolometry
in terms of sensitivity. We briefly introduce some of the bolometric
interferometry key concepts and difficulties. We then give the specifications
of the BRAIN future detector. A first module of the final instrument is planned
to be installed at Dome C in 2010. We hope to constrain a tensor to scalar
modes ratio of 0.01 with nine modules and one effective year of data. BRAIN is
a collaboration between France, Italy and United Kingdom.
