Design of the magnetic diagnostic for ITER

The detailed design of the magnetic diagnostic for ITER is presented. The s ystem consists of groups of pickup coils and flux loops on the vessel wall, the back plate, and the divertor. These sensors provide the measurements f or the equilibrium reconstruction and the fluctuation analysis. The system is supplemented by Rogowski coils for halo current measurements and by a di amagnetic loop. The complete system meets the measurement requirements, mat ching those of contemporary large divertor tokamaks. The maximum radiation exposure is such that the sensors will survive for the lifetime of the ITER . (C) 1999 American Institute of Physics. [S0034-6748(99)63201- 4].