• P.A.P. Nghiem, N. Chauvin, O. Delferrière, R.D. Duperrier, A. Mosnier, D. Uriot
  CEA, Gif-sur-Yvette
• M. Comunian
  INFN/LNL, Legnaro (PD)
• C. Oliver
  CIEMAT, Madrid

The two IFMIF (International Fusion Materials Irradiation Facility) accelerators will each have to deliver 5 MW of deuteron beam at 40 MeV. To validate the conceptual design, a prototype, consisting of one 9 MeV accelerator called EVEDA (Engineering Validation and Engineering Design Activity), is being constructed. Beam dynamics studies are entering the final phase for the whole EVEDA and for the accelerating part of IFMIF. The challenging point is to be able to reconcile the very strong beam power and the hands-on maintenance constraint. At energies up to 5 MeV, difficulties are to reach the requested intensity under a very strong space charge / compensation regime. Over 5 MeV, difficulties are to make sure that beam losses can be maintained below 10^-6 of the beam intensity. This paper will report the strategies and choices adopted in the optics design and the beam measurement proposal.