1. BENE MECC detector Pasquale Migliozzi INFN – Napoli

2. MECC structure Electronic det: e/  separator & “Time stamp” Rohacell® plate emulsion film stainless steel plate (1mm) We focused on the “target + spectrometer” optimization 3cm

3. Status and outlook Detailed study of the performance of a magnetized stainless steel target A proposal of a possible design of far detector A first test at KEK gave good results Basic performances of the detector can be easily studied with a single brick: no need for large R&D and prototype construction, but an extensive test beam program is mandatory A preliminary estimate based on the OPERA experience and taking into account the MECC features indicates that the number of silver events can be increased by about a factor 3 Finalize the electron analysis: the e/  separation and the charge reconstruction Study the muon identification with the electronic detector Check the sensitivity to the “golden” (the muon threshold is at 3 GeV!) A full simulation of neutrino events is mandatory in order to evaluate the oscillation sensitivity

4. Remarks How to magnetize large volumes and which is the maximum achievable field could be a show stop!. Depending on this item the physics reach of a NuFact can strongly change. In case the magnetic field is feasible the MECC has interesting synergies with other techniques for the electronic detector In case the magnetic field is NOT feasible then a “conventional” ECC detector to study the silver channel through the muonic channel is still feasible

5. Requests (Preliminary) 2007: 2 FTE for MC simulation and analysis; 4 FTE to perform testbeams and emulsion scanning plus money to build prototypes. Total request: 250000 € 2008: 2 FTE for MC simulation and analysis; 4 FTE to perform testbeams and emulsion scanning plus money to build prototypes. Total request: 250000 € 2009: 2 FTE for MC simulation and analysis; 4 FTE to perform testbeams and emulsion scanning plus money to build prototypes. Total request: 250000 € 2010: 2 FTE for MC simulation and analysis; 4 FTE to perform testbeams and emulsion scanning plus money to build prototypes. Total request: 250000 € The test-beams are aimed at the study of different target and spectrometer configurations, and at the study of different charged particle beams (electrons, pions and muons). This program could cover the first 3 years, while on 2010 we would like to perform a test together with the electronic detectors.