Overview of power exhaust experiments in the COMPASS divertor with liquid metals

• DOI: 10.1016/j.nme.2020.100801
• Publication Date: 2020-10-01T08:45:57Z
• Authors: R. Dejarnac; J. Horacek; M. Hron; M. Jerab; J. Adamek; S. Atikukke; P. Barton; J. Cavalier; J. Cecrdle; M. Dimitrova; E. Gauthier; M. Iafrati; M. Imrisek; A. Marin Roldan; G. Mazzitelli; D. Naydenkova; A. Prishvitcyn; M. Tomes; D. Tskhakaya; G. Van Oost; J. Varju; P. Veis; A. Vertkov; P. Vondracek; V. Weinzettl
• Keywords: Liquid metal; Fusion power; Electric arc

Power handling experiments with a special liquid metal divertor module based on the capillary porous system technology were performed in tokamak COMPASS. The performance of two metals (Li and LiSn alloy) tested for first time under ELMy H-mode conditions. No damage mesh good exhaust capability observed both separate up to 12 MW/m2 deposited perpendicular, inter-ELM steady-state heat flux ELMs relative energy ~3% local peak fluence at ~15 kJ.m−2. droplets directly ejected from top surface experiment, no contamination core SOL plasmas by Sn was observed. elemental depth profile analysis 14 stainless-steel samples located around vacuum vessel each experiment provides information about migration evaporated/redeposited elements.