DIVERTOR DEVELOPMENT FOR ITER

The requirements for the ITER divertor design, i.e. power and He ash e xhaust, neutral leakage control, lifetime, disruption load resistance and exchange by remote handling, are described in this paper. These re quirements and the physics requirements for detached and semi-attached operation result in the vertical target configuration. This is realis ed by a concept incorporating 60 cassettes carrying the high heat flux components. The armour choice for these components is CFC monoblock i n the strike zone near the lower part of the vertical target, and a W brush elsewhere. Cooling is by swirl tubes or hypervapotrons depending on the component. The status of the heat sink and joining technology R and D is given. Finally, the resulting design of the high heat flux components is presented. (C) 1998 Elsevier Science S.A. All rights res erved.