Author: Simeoni, W.
Paper Title Page
MOODB01 Dynamics of the IFMIF Very High-intensity Beam 53
 
  • P.A.P. Nghiem, R.D. Duperrier, A. Mosnier, D. Uriot
    CEA/DSM/IRFU, France
  • N. Chauvin, O. Delferrière, W. Simeoni
    CEA/IRFU, Gif-sur-Yvette, France
  • M. Comunian
    INFN/LNL, Legnaro (PD), Italy
  • C. Oliver
    CIEMAT, Madrid, Spain
 
  For the purpose of material studies for future nuclear fusion reactors, the IFMIF deuteron beams present a simultaneous combination of unprecedentedly high intensity (2x125 mA CW), power (2x5 MW) and space charge. Special considerations and new concepts have been developed in order to overcome these challenges. The global strategy for beam dynamics design in the 40 MeV IFMIF accelerators is presented, stressing on the control of micro-losses, and the possibility of on-line fine tuning. The obtained results are then analysed in terms of beam halo and emittance growth.  
slides icon Slides MOODB01 [3.807 MB]  
 
MOPS027 Stability Charts for the IFMIF SRF-Linac 658
 
  • W. Simeoni, N. Chauvin
    CEA/IRFU, Gif-sur-Yvette, France
  • A. Mosnier, P.A.P. Nghiem, D. Uriot
    CEA/DSM/IRFU, France
 
  Among the most recent projects, the IFMIF-EVEDA accelerators break the record of high intensity, leading to a multi-MW beam power at relatively low energy. The concern for such accelerated beams is the predominance of the self-field energy upon the beam energy. In these conditions, the space charge effect is at its maximum, which triggers different nonlinear mechanisms implying emittance growth, halo formation and sudden particle lost. In this proceeding we show the stability charts constructed for the IFMIF SRF-Linac, with which are identified the collective space charge resonances responsible of transverse-longitudinal emittance exchange and emittance growth.