The ITER TF coil ripple: Evaluation of ripple attenuation using Fe insert and of ripple enhancement produced by TBM

A. Portone, M. Roccella, R. Roccella, F. Lucca, G. Ramogida

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Abstract

An accurate evaluation of the toroidal field ripple in ITER has been carried out by finite element models including the presence of the 18 TF coils and a set of ferromagnetic inserts that aim to lower the field ripple well below 1%. As shown, a set of ad hoc distributed plates made of AISI 430 stainless steel (Bsat= μ0Msat∼1.5 T) and located at the outboard plasma region side in between the vessel shells can reduce the peak ripple at the plasma boundary to ∼0.4% at full toroidal field (i.e., BTF∼5.3 T at R = 6.2 m). Better compensation can be achieved by adopting higher magnetic saturation materials (e.g., EUROFER). The Test Blanket Modules pair modeled here and made of EUROFER (Bsat∼1.8 T at 300 K) introduces a large perturbation to the field ripple up to ∼1.1% at full field. © 2008 A. Portone.
Original languageEnglish
Pages (from-to)1619 - 1624
Number of pages6
JournalFusion Engineering and Design
Volume83
Issue number10-12
DOIs
Publication statusPublished - Dec 2008
Externally publishedYes

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All Science Journal Classification (ASJC) codes

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

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