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It is proposed to complement the ESS proton linac with equipment that wouldenable the production, concurrently with the production of the planned ESS beamused for neutron production, of a 5 MW beam of 10$^{23}$ 2.5 GeV protons peryear in microsecond short pulses to produce a neutrino Super Beam, and toinstall a megaton underground water Cherenkov detector in a mine to detect$\nu_e$ appearance in the produced $\nu_\mu$ beam. Results are presented ofpreliminary calculations of the sensitivity to neutrino CP violation and themass hierarchy as a function of the neutrino baseline. The results indicatethat, with 8 years of data taking with an antineutrino beam and 2 years with aneutrino beam and a baseline distance of around 400 km, CP violation could bediscovered at 5 $\sigma$ (3 $\sigma$) confidence level in 48% (73%) of thetotal CP violation angular range. With the same baseline, the neutrino masshierarchy could be determined at 3 $\sigma$ level over most of the total CPviolation angular range. There are several underground mines with a depth ofmore than 1000 m, which could be used for the creation of the underground sitefor the neutrino detector and which are situated within or near the optimalbaseline range.

The use of a high intensity neutrino beam from the ESS proton linac for measurement of neutrino CP violation and mass hierarchy