Manufacturing of prototype components for the ITER divertor baffle

A program for the supply of baffle prototypes was realised as a demonstration of the manufacturing features for different designs of baffle and limiter modules. The scope of the manufacture was aimed on the fist wall heat sink materials such as DS-copper, carbon fibre reinforced carbon (CFC) monoblocks, and armour materials, such as CFC and tungsten vacuum plasma spray. The supply concerns four baffle prototypes with a quasi-poloidal shape and having different geometries with two cooling channels each. Each panel was attached onto a steel block, as a shield block. Type A panels had a DS-copper heat sink with two thin stainless steel tubes and were either plasma-sprayed tungsten (type A/W), or CFC tiles (type A/CFC). CFC monoblock panels consisted in two assembled single CFC U-shaped prototypes with a rear slot cutting and a CuCrZr tube supported by means of S.S. pads (type B), or monoblocks with CuCrZr tubes, put on a S.S. dove-tail mechanical attachment (type C). The manufacturing routes of the four types baffle fabrication are briefly described.