High power plasma interaction with tungsten grades in ITER relevant conditions

15th Latin American Workshop on Plasma Physics; 21st IAEA TM on Research Using Small Fusion Devices

Garkusha, I.E.^1 ; Makhlaj, V.A.^1 ; Aksenov, N.N.^1 ; Byrka, O.V.^1 ; Malykhin, S.V.^2 ; Pugachov, A.T.^2 ; Bazylev, B.^3 ; Landman, I.^3 ; Pinsuk, G.^4 ; Linke, J.^4 ; Wirtz, M.^4 ; Sadowski, M.J.^5 ; Skladnik-Sadowska, E.^4

Institute of Plasma Physics, NSC Kharkov Institute of Physics and Technology, Kharkov, Ukraine^1

National Technical University Kharkov Polytechnical Institute, Kharkov, Ukraine^2

Karlsruhe Institute of Technology, IHM, P.O. Box 3640, Karlsruhe

76021, Germany^3

Forschungszentrum Juelich GmbH, EURATOM Association, Juelich

52425, Germany^4

National Centre for Nuclear Research (NCBJ), Otwock

05-400, Poland^5

关键词: Candidate materials;    Elongated grains;    Evolution and Change;    Experimental simulations;    Load parameters;    Pulse durations;    Quasi-stationary;    Transient events;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/591/1/012030/pdf
DOI  :  10.1088/1742-6596/591/1/012030

来源: IOP

【 摘 要 】

Experimental simulations of ITER-like transient events with relevant surface heat load parameters (energy density up to 1.1 MJ/m2and the pulse duration of 0.25 ms) as well as particle loads (varied in wide range from 1023to 1027ion/m2s) were carried out with a quasistationary plasma accelerator QSPA Kh-50. Particular attention was paid to elaboration of damage of tungsten as a main candidate material for ITER divertor surfaces and also as prospective material for DEMO design. Erosion features, cracks evolution and changes in their thickness with increasing exposition dose are studied for different W grades, including deformed material with elongated grains, as well as WTa5 and sintered tungsten.