He-cooled divertor for Demo. Manufacture and high heat flux tests of W-based mock-ups

Norajitra, P.; Holstein, N.; Krauss, W.; Kruessmann, R.; Messemer, G.; Reiser, J.; Rieth, M.; Widak, V.; Zinn, K.; Mazul, I.; Gervash, A.; Giniyatulin, R.; Kuznetsov, V.; Makhankov, A.; Ovchinnikov, I.; Hirai, T.; Linke, J.; Ritz, G.; Wessel, E.