Analysis of active and passive magnetic field reduction systems (MFRS) of the ITER NBI

M. Roccella, F. Lucca, R. Roccella, A. Pizzuto, G. Ramogida, A. Portone, A. Tanga, A. Formisano, R. Martone

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In ITER two heating (HNBI) and one diagnostic neutral beam injectors (DNBI) are foreseen. Inside these components there are very stringent limits on the magnetic field (the flux density must be below some G along the ion path and below 20 G in the neutralizing regions). To achieve these performances in an environment with high stray field due to the plasma and the poloidal field coils (PFC), both passive and active shielding systems have been foreseen. The present design of the magnetic field reduction systems (MFRS) is made of seven active coils and of a box surrounding the NBI region, consisting of ferromagnetic plates. The electromagnetic analyses of the effectiveness of these shields have been performed by a 3D FEM model using ANSYS code for the HNBI. The ANSYS models of the ferromagnetic box and of the active coils are fully parametric, thus any size change of the ferromagnetic box and coils (linear dimension or thickness) preserving the overall box shape could be easily reproduced by simply changing some parameter in the model. © 2007 Elsevier B.V. All rights reserved.
Original languageEnglish
Pages (from-to)709 - 715
Number of pages7
JournalFusion Engineering and Design
Issue number5-14
Publication statusPublished - Oct 2007
Externally publishedYes


All Science Journal Classification (ASJC) codes

  • Energy Engineering and Power Technology
  • Nuclear Energy and Engineering
  • Civil and Structural Engineering
  • Mechanical Engineering

Cite this

Roccella, M., Lucca, F., Roccella, R., Pizzuto, A., Ramogida, G., Portone, A., ... Martone, R. (2007). Analysis of active and passive magnetic field reduction systems (MFRS) of the ITER NBI. Fusion Engineering and Design, 82(5-14), 709 - 715.