Neutrinos M Meddahi 10042007 1 World context International

Neutrinos M. Meddahi 10/04/2007 1

World context International Scoping Study of a NF and SB facility ended NUFACT 06 : Aim: establish a baseline scenario of a more detailed study and R&D programme Report being written (with executive summary) WG 3 (Accelerator studies) listed the required issues to be further investigated and emphasised the importance of experimental work (MERIT, MICE…) What’s next: International Design Study 3 IDS : Neutrino Factory, Beta Beams, Super Beams Deliverables for each IDS: 2010 Interim Design Report 2012 Reference Design Report (engineering design of most components) Organisational matters still being discussed Goal: launch IDS at NUFACT 07 10/04/2007 2

Proposal in FP 7 European Neutrino Design Study (Euron DS), 4 years (2008 -2011), 4 MEuros Coordinator: R. Edgecock (RAL), Deputies: M. Dracos (IN 2 P 3), M. Lindroos - WP on Beta beam (M. Benedikt, A. Fabich) - WP on Neutrino Factory (Ken Long, Imperial College, U. K) + 4 other WPs: Super Beams, Detectors, Physics, Management CERN participation in the NF WP - muon front end studies- still questioned due to the lack of CERN manpower and no clear engagement of main EU participants yet 10/04/2007 3

PAF evaluated the maximum potential proton flux to CNGS Report written Protons on target per year [x 1019] for 200 days of operation with 80% machine availability SPS cycle length Injection momentum Beam sharing 6 s 4. 8 s 14 Ge. V/c 26 Ge. V/c 0. 45 0. 85 4. 8 “nominal. CNGS” 5 9. 4 5. 7 “maximum SPS” 5. 9 11. 1 0. 45 0. 85 Max SPS intensity @ 400 Ge. V [x 1013] Present injectors + machines’ improvement 10/04/2007 Future injectors + SPS RF upgrade 7 “ultimate CNGS” 9 17. 1 Future injectors + new SPS RF system + CNGS new equipment design 10 “Maximum PS 2” 12. 9 24. 5 4

Intensity limitation Protons per batch Protons per cycle Proton flux [pot/year] Radiation Protection calculation and optimisation 3. 5 x 1013 Soil/concrete activation: 4. 5 x 1019 Air/water activation: 7. 6 x 1019 Target design 3. 5 x 1013 1. 4 x 1014 2 x 1020 Horn design 3. 5 x 1013 7 x 1013 1. 38 x 1020 Shielding, Decay Tube, Hadron stop design 1. 38 x 1020 Kicker system 3. 5 x 1013 Instrumentation 3. 5 x 1013 1 x 1014 Ø Beyond nominal 4. 5 x 1019 pot/y: All CNGS RP calculations / studies to be redone New INB approval mandatory Ø For more than 1. 38 x 1020 pot/y, all secondary beam line components must be re-designed. Ø Very difficult -if not impossible- to access the target chamber after nominal CNGS run Ø Experience gained running the present CNGS facility is needed to benchmark design values and prepare for an upgraded facility in the future. 10/04/2007 5