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.
All Science Journal Classification (ASJC) codes
- Nuclear Energy and Engineering
- Civil and Structural Engineering
- Mechanical Engineering
- Materials Science(all)
Portone, A., Roccella, M., Roccella, R., Lucca, F., & Ramogida, G. (2008). The ITER TF coil ripple: Evaluation of ripple attenuation using Fe insert and of ripple enhancement produced by TBM. Fusion Engineering and Design, 83(10-12), 1619 - 1624. https://doi.org/10.1016/j.fusengdes.2008.08.042