THP1WB —  WG-B   (21-Jun-18   14:00—15:30)
Paper Title Page
THP1WB01 Commissioning Status of Linear IFMIF Prototype Accelerator (LIPAc) -1
  • A. Kasugai, T. Akagi, T. Ebisawa, Y. Hirata, R. Ichimiya, K. Kondo, S. Maebara, K. Sakamoto, T. Shinya, M. Sugimoto
    QST, Aomori, Japan
  • P. Abbon, N. Bazin, B. Bolzon, N. Chauvin, S. Chel, R. Gobin, J. Marroncle, B. Renard
    CEA/DSM/IRFU, France
  • L. Antoniazzi, L. Bellan, D. Bortolato, M. Comunian, E. Fagotti, F. Grespan, M. Montis, A. Palmieri, A. Pisent
    INFN/LNL, Legnaro (PD), Italy
  • P.-Y. Beauvais, H. Dzitko, D. Gex, A. Jokinen, G. Phillips
    F4E, Germany
  • P. Cara, R. Heidinger, I. Moya
    Fusion for Energy, Garching, Germany
  • D. Jiménez-Rey, I. Kirpitchev, J. Mollá, P. Méndez, I. Podadera, D. Regidor, M. Weber, C. de la Morena
    CIEMAT, Madrid, Spain
  • J. Knaster, A. Marqueta, G. Pruneri, F. Scantamburlo
    IFMIF/EVEDA, Rokkasho, Japan
  The IFMIF project aiming at material tests for a future fusion DEMO reactor is under the EVEDA phase in the BA Agreement of fusion program between Japan and EU. As the accelerator activity, the installation and commissioning of the Linear IFMIF Prototype Accelerator (LIPAc) is at the second stage of demonstration of the feasibility of the low energy section of an IFMIF deuteron accelerator up to 9 MeV with a beam current of 125 mA, CW. The installation of injector, RFQ, MEBT, D-Plate and LPBD for LIPAc with 8 coaxial high-power transmission lines and RF power system was just done in 2017 at Rokkasho, Japan. After that, the RF conditioning of RFQ for beam commissioning is underway. The beam commissioning of RFQ with H+/D+ and the acceleration demonstration up to 5 MeV-125 mA-0.1% duty cycle with D+ will be done.  
slides icon Slides THP1WB01 [13.177 MB]  
Beam Dynamics in Low Energy Beam Lines with Space Charge Compensation  
  • N. Chauvin, N. Pichoff, D. Uriot
    IRFU, CEA, University Paris-Saclay, Gif-sur-Yvette, France
  • A. Chancé
    CEA/DRF/IRFU, Gif-sur-Yvette, France
  • F. Gérardin
    CEA/IRFU, Gif-sur-Yvette, France
  The study of the dynamics of low energy beam transport (LEBT) line is one of the major challenges in the high intensity hadron accelerators field. At low energy, the beam transport is dominated by the charge space field which in many cases can induce a halo formation, emittance growth and eventually beam losses. Moreover, beam dynamics in LEBT features a unique specificity: space charge compensation induced by ionisation of the residual gas by the propagating beam. In order to attempt to reach a better understanding of space charge compensation and particles dynamics in LEBTs, extensive numerical simulations using the PIC code Warp have been performed. Simulation results for light ions beams propagating in the LEBT of the IFMIF-LIPAc and MYRRHA accelerator will be presented and compared to experimental results.  
slides icon Slides THP1WB02 [6.063 MB]  
Classification of Space-Charge Resonances and Instabilities  
  • D. Jeon
    IBS, Daejeon, Republic of Korea
  There are two families of space charge mechanisms: space charge resonances and instabilities. For the same mechanism, there are many different names and they are used in an ambiguous way: resonances or single particle resonances or incoherent resonances, and instabilities or parametric resonances or coherent resonances. This talk will emphasize the fundamental difference between the two families of mechanisms and to suggest how to name them in a more consistent way.  
slides icon Slides THP1WB03 [4.823 MB]