| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 272769 | Fusion Engineering and Design | 2008 | 6 Pages |
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.
