Magnetically Based Acceptance Procedures for ITER Toroidal Coils: An Assessment of Performance

The Toroidal Field Coils (TFC) are subject to mandatory geometrical tolerances constraints for acceptance by ITER Organization. As a consequence, pre-assembly tests are foreseen to verify if each single coil meets such criteria, including laser tracking, and possibly warm magnetic measurements on each of the finished winding packs. Possible performance limitations of the acceptance tests for the winding pack are assessed in this paper. Since construction details are not presently known, the paper proposes an assessment of the mathematical and numerical tools able to perform the final evaluation of the actual feasibility of magnetic testings and discusses their performance in terms of accuracy and reliability.