Toward Tungsten Plasma-Facing Components in KSTAR: Research on Plasma-Metal Wall Interaction

• DOI: 10.13182/fst14-897
• Publication Date: 2015-05-22T19:13:22Z
• Authors: S.-H. Hong; K.-M. Kim; J.-H. Song; E.-N. Bang; H.-T. Kim; K.-S. Lee; A. Litnovsky; M. Hellwig; D. C. Seo; H. H. Lee; C. S. Kang; H.-Y. Lee; J.-H. Hong; J. G. Bak; H.-S. Kim; J.-W. Juhn; S.-H. Son; H.-K. Kim; D. Douai; C. Grisolia; J. Wu; G.-N. Luo; W.-H. Choe; M. Komm; M. Van Den Berg; G. De Temmerman; R. Pitts
• Keywords: KSTAR; Upgrade; Fusion power; ASDEX Upgrade

One of the main missions KSTAR is to develop long-pulse operation capability relevant production fusion energy. After a full metal wall configuration was decided for ITER, major upgrade planned, tungsten first similar JET ITER-like (coatings and bulk plasma-facing components). To accomplish upgrade, bonding technology has been developed tested. Since leading edges each castellation structure have be protected, shaping blocks studied by ANSYS simulation, miniaturized exposed Ohmic plasma confirm simulation results. It found that shaped block more heat handling than conventional block. For dedicated experiments, multipurpose fabricated Ohmic, L- H-mode plasmas observed IR camera from top. During fabrication assembly blocks, caused "naturally misaligned" due engineering limits with maximum level up 0.5 mm observed, these minimized future machine.