Laser welding of plasma facing units for ITER divertor Dome manufacturing

The ITER divertor is a modular structure consisting of 54 cassettes. Each cassette consists of the cassette body, inner and outer vertical targets and Dome. The Russian Federation is responsible for manufacturing and delivery of 60 Domes for ITER. Each Dome consists of the steel support structure with 34 plasma-facing units of Umbrella, Inner Particle Reflector Plate and Outer Particle Reflector Plate (OPRP). The steel support structure includes three manifolds. Each plasma-facing unit part from 316L(N)-IG steel is supposed to be welded by laser beam welding.