The ESS$\nu$SB project proposes the production of a
European neutrino Super Beam for the discovery of the CP
symmetry violation in the leptonic sector. For this purpose,
an upgrade is under design of the 5 MW, 2 GeV proton beam
from the LINAC of the European Spallation Source, currently
under construction in Lund (Sweden), to obtain an additional
5 MW power beam dedicated to the neutrino production, without
therefore reducing the neutron production efficiency. The
additional proton beam will be then directed to an
accumulator and split through a switchyard in four beams,
each of 1.25 MW power. The secondary beam will be delivered
to a target station consisting of four target-horn
collectors, a decay tunnel, and a beam dump. A dedicated
design study of the Target Station is required to optimize
the lifetime of the horn, regarding mechanical and thermal
constraints, and the CP sensitivity of the experiment. The
current status of this design study is here presented. This
project is supported by a COST Action and an EU H2020 Design
Study.