Protections against grid breakdowns in the ITER neutral beam injector power supplies

M. Bigi, V. Toigo, L. Zanotto

Research output: Contribution to journalArticle

13 Citations (Scopus)


During operation of the Neutral Beam Injector (NBI) of the International Thermonuclear Experimental Reactor (ITER), breakdowns of the acceleration grids will occur routinely. The paper describes the analyses performed on the protections for the ITER -1 MV acceleration circuit, from detailed modelling including stray capacitance to circuit simulations. The study addresses normal operation and grid breakdown, in a comprehensive design approach that investigates the role of additional passive components and of inverter control. Extra resistance in series to the -1 MV conductor was found to play a crucial role in the resulting protection scheme, with a significant reduction of the power supply contribution to the energy dissipated in a grid breakdown. © 2007 Elsevier B.V. All rights reserved.
Original languageEnglish
Pages (from-to)905 - 911
Number of pages7
JournalFusion Engineering and Design
Issue number5-14
Publication statusPublished - Oct 2007
Externally publishedYes


All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Materials Science(all)
  • Nuclear Energy and Engineering
  • Mechanical Engineering

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