Performance of deformed tungsten under ELM-like plasma exposures in QSPA Kh-50

Cracking thresholds and crack patterns (major- and micro-) as well as residual stresses in tungsten targets after repetitive ITER ELM-like plasma pulses have been studied in recent simulation experiments in the quasi-stationary plasma accelerator QSPA Kh-50. Experiments were carried out for preheate...

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Bibliographic Details
Published in:Journal of nuclear materials 2011-08, Vol.415 (1), p.S65-S69
Main Authors: Garkusha, I.E., Landman, I., Linke, J., Makhlaj, V.A., Medvedev, A.V., Malykhin, S.V., Peschanyi, S., Pintsuk, G., Pugachev, A.T., Tereshin, V.I.
Format: Article
Language:English
Subjects:
Applied sciences
Controled nuclear fusion plants
Elongation
Energy
Energy. Thermal use of fuels
Exact sciences and technology
Exposure
Fission nuclear power plants
Fracture mechanics
Fuels
Installations for energy generation and conversion: thermal and electrical energy
Melting
Nuclear fuels
Plasma accelerators
Residual stress
Thresholds
Tungsten
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Summary:Cracking thresholds and crack patterns (major- and micro-) as well as residual stresses in tungsten targets after repetitive ITER ELM-like plasma pulses have been studied in recent simulation experiments in the quasi-stationary plasma accelerator QSPA Kh-50. Experiments were carried out for preheated samples of ITER reference grade of tungsten (with elongated grains). The QSPA plasma exposures were performed for the targets preheated at 200°C, 400°C and 600°C, to estimate effects of Ductile-to-Brittle Transition Temperature (DBTT) on cracking development. Tungsten surface was analyzed after 1pulse, 5pulses and 10pulses of 0.25ms time duration to investigate the influence of material modification by plasma exposures on cracking thresholds. The magnitude of heat load was 0.2MJ/m2, 0.3MJ/m2, 0.45MJ/m2 (without melting) and 0.75MJ/m2 (above the melting threshold).
ISSN:0022-3115
1873-4820
DOI:10.1016/j.jnucmat.2010.11.047