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Comunian, M.

Paper Title Page
TUO1B03 The IFMIF-EVEDA Challenges and their Treatment 309
 
  • 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 IFMIF project (International Fusion Materials Irradiation Facility) is one of the three parts of the Fusion Broader Approach signed by Japan and Europe, aiming at studying materials which must resist to very intense neutron radiations in future fusion reactors. One major system of this project is its two accelerators producing the neutron flux by accelerating Deuteron particles up to 40 MeV against a Lithium target. In a first phase called EVEDA (Engineering Validation and Engineering Design Activity), a full scale prototype accelerating particles up to 9 MeV is being studied and constructed in Europe, to be installed in Japan. Two unprecedented performances are required: the very high power and very high intensity of 2x5 MW and 2x125 mA CW. That leads to numerous unprecedented challenges: harmful losses even for those as low as 10-6 of the beam, non-linear dynamics induced by very strong space charge forces, difficulties for equipment and diagnostic implementations in the high compact sctructure, need of specific tuning strategies in this context. These issues are highlighted in this article, and the ways they are addressed are detailed.

 

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THO1B02 Loss Control and Reliability Issues in High Intensity Linacs 580
 
  • M. Comunian
    INFN/LNL, Legnaro (PD)
 
 

New projects like IFMIF or the new generation of Spallation Neutron Source require high power beams with high availability and reliability. To achieve these results one needs low beam losses and a good control beam dynamics. This paper focuses on the important characteristics and critical beam dynamics design issues for the high intensity linacs. In particular the techniques used for the loss control at the design stage, with the emphasis on the physical phenomena like emittance growth and halo. The reliability issue will be addressed with practical examples from the low energy and high current IFMIF-EVEDA project and comparing this case with higher energy projects.

 

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