Open AccessTungsten dust remobilization under steady-state and transient plasma conditions
Author(s) -
S. Ratynskaia,
P. Tolias,
M. De Angeli,
V. Weinzettl,
Jiří Matějíček,
I. Bykov,
D.L. Rudakov,
L. Vignitchouk,
E. Thorén,
G. Riva,
D. Ripamonti,
T.W. Morgan,
R. Pánek,
G. De Temmerman
Publication year - 2016
Publication title -
nuclear materials and energy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.324
H-Index - 25
ISSN - 2352-1791
DOI - 10.1016/j.nme.2016.10.021
Subject(s) - tungsten , plasma , transient (computer programming) , thermal conduction , steady state (chemistry) , materials science , mechanics , fusion power , environmental science , nuclear engineering , atomic physics , chemistry , composite material , metallurgy , physics , nuclear physics , computer science , engineering , operating system
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
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