Tungsten dust remobilization under steady-state and transient plasma conditions.

0480267 - ÚFP 2018 RIV NL eng J - Článek v odborném periodiku
Ratynskaia, S. - Tolias, P. - De Angeli, M. - Weinzettl, Vladimír - Matějíček, Jiří - Bykov, I. - Rudakov, D.L. - Vignitchouk, L. - Thorén, E. - Riva, G. - Ripamonti, D. - Morgan, T. - Pánek, Radomír - De Temmerman, G.
Tungsten dust remobilization under steady-state and transient plasma conditions.
Nuclear Materials and Energy. Roč. 12, August (2017), s. 569-574. E-ISSN 2352-1791.
[PSI 2016 - 22nd International Conference on Plasma Surface Interactions in Controlled Fusion Devices/22./. Roma, 30.05.2016-03.06.2016]
Grant CEP: GA ČR(CZ) GA14-12837S; GA MŠMT(CZ) LM2015045
GRANT EU: European Commission(XE) 633053 - EUROfusion
Institucionální podpora: RVO:61389021
Klíčová slova: Tungsten * Dust * Remobilization * Tokamak
Obor OECD: Fluids and plasma physics (including surface physics)
http://www.sciencedirect.com/science/article/pii/S2352179116301168

Remobilization is one of the most prominent unresolved fusion dust-relevant issues, strongly related to the lifetime of dust in plasma-wetted regions, the survivability of dust on hot plasma-facing surfaces and the formation of dust accumulation sites. A systematic cross-machine study has been initiated to investigate the remobilization of tungsten micron-size dust from tungsten surfaces implementing a newly developed technique based on controlled pre-adhesion by gas dynamics methods. It has been utilized in a number of devices and has provided new insights on remobilization under steady-state and transient conditions. The experiments are interpreted with contact mechanics theory and heat conduction models.
Trvalý link: http://hdl.handle.net/11104/0276108