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In the framework of the EUROnu design study, a new design for the CERN to Fréjus neutrino beam based on the SPL is under development by the WP2 group. This neutrino beam allows to significantly improve the measure on the mixing angle θ13 and CP violation by using a multi-MW proton beam of 4.5 GeV/c, a baseline of 130 km and the future water Cherenkov MEMPHYS (440 kton fiducial mass) far detector. The main challenge of this project lies with the design of a multiMW target and hadronic collector for the proton beam. The horn and the decay tunnel parameters have been optimized with a novel procedure based on a scan of a multi-dimensional parameter space in order to maximize any potential discovery. The target design, thermo-mechanical analysis, and power supply design of the horn system as well as any safety issues are being studied to meet the MW power requirements of the proton beam. The results from the combined experiment of the Super-Beam and MEMPHYS detector and its high physics potential are also discussed.

A new design for the CERN to Fréjus neutrino beam