Electromagnetic and structural analyses of the ITER central solenoid feeders

In the current ITER design, the six central solenoid coils are fed with electrical currents through three upper feeders and three lower feeders. These feeders, that are mounted on the key blocks, are required to withstand cooling and electromagnetic loads through different ITER operation scenarios. The IxB interaction of the currents and the magnetic field exerts loads on the superconducting leads and busbars in the feeders. These loads are transferred to the feeder structures through clamps that hold the conductors along their paths. The upper and lower ITER CS feeder structures including the feeder boxes, bus bars, and coil leads for CS2U and CS2L coils were analyzed using finite element techniques. The coupled Electromagnetic-structural FEM analyses included the effect of electromagnetic forces as well as liquid Helium cooling on the bus bars and coil leads for two different ITER scenarios. The results of these analyses and their implications for the design of feeders are discussed in this paper.