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Dust remobilization from rough planar surfaces in tokamak steady-state plasmas
The ability of tungsten (W) dust to be remobilized from rough tokamak plasma-facing surfaces is investigated in this study. Atomic Force Microscopy is used to evaluate the adhesion force distribution between W spheroids of ∼1−10 µm radius and a rough W substrate. Our results confirm that the Rabinovich model describes reasonably well the mean adhesion force in tokamak-relevant surface roughness regimes. The external (electric and ion drag) forces are estimated as well using a simplified sheath model. The results reveal that micron-size dust can be resuspended by attainable electric fields in tokamak conditions.
Dust remobilization from rough planar surfaces in tokamak steady-state plasmas
The ability of tungsten (W) dust to be remobilized from rough tokamak plasma-facing surfaces is investigated in this study. Atomic Force Microscopy is used to evaluate the adhesion force distribution between W spheroids of ∼1−10 µm radius and a rough W substrate. Our results confirm that the Rabinovich model describes reasonably well the mean adhesion force in tokamak-relevant surface roughness regimes. The external (electric and ion drag) forces are estimated as well using a simplified sheath model. The results reveal that micron-size dust can be resuspended by attainable electric fields in tokamak conditions.
Dust remobilization from rough planar surfaces in tokamak steady-state plasmas
A. Autricque (Autor:in) / S. Peillon (Autor:in) / F. Gensdarmes (Autor:in) / M. Sow (Autor:in) / N. Fedorczak (Autor:in) / H. Roche (Autor:in) / O. Pluchery (Autor:in) / C. Grisolia (Autor:in)
2018
Aufsatz (Zeitschrift)
Elektronische Ressource
Unbekannt
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