Overview of the engineering design of ITER divertor

The ITER divertor cassettes, which support plasma-facing components (PFCs), provide the flexibility to adapt to changing design requirements imposed by the evolving understanding of divertor physics. This paper gives an overview of how the divertor has been adjusted to meet the most recent changes in the ITER design also describing some cost saving design simplifications. Furthermore, the paper deals with an overview of the engineering R&D, shared amongst the Home Teams, that is underway in support of PFC development. In particular the paper summarises the ‘hot’ liner R&D. This R&D has produced interesting laboratory results and their relevance in mitigating carbon–tritium deposition in ITER is discussed.