Arcing at B4C-covered limiters exposed to a SOL-plasma

Laux, M.; Schneider, W.; Wienhold, P.; Jüttner, B.; Huber, A.; Balden, M.; Linke, J.; Kostial, H.; Mayer, M.; Rubel, M.; Herrmann, A.; Pospieszczyk, A.; Jachmich, S.; Schweer, B.; Hildebrandt, D.; Bolt, H.

doi:10.1016/S0022-3115(02)01333-8

Datensatz

DATENSATZ AKTIONENEXPORT

Zur Ablage hinzufügen

Lokale TagsFreigabegeschichteDetailsÜbersicht

Freigegeben

Zeitschriftenartikel

Arcing at B₄C-covered limiters exposed to a SOL-plasma

MPG-Autoren

/persons/resource/persons109772

Laux, M.
W7-X: Physics (PH), Max Planck Institute for Plasma Physics, Max Planck Society;

/persons/resource/persons110410

Schneider, W.
Tokamak Theory (TOK), Max Planck Institute for Plasma Physics, Max Planck Society;

/persons/resource/persons110791

Wienhold, P.
Plasma Diagnostics Group (HUB), Max Planck Institute for Plasma Physics, Max Planck Society;

/persons/resource/persons109526

Jüttner, B.
Plasma Diagnostics Group (HUB), Max Planck Institute for Plasma Physics, Max Planck Society;

/persons/resource/persons108606

Balden, M.
Material Research (MF), Max Planck Institute for Plasma Physics, Max Planck Society;

/persons/resource/persons109910

Mayer, M.
Material Research (MF), Max Planck Institute for Plasma Physics, Max Planck Society;

/persons/resource/persons109371

Herrmann, A.
Experimental Plasma Physics 1 (E1), Max Planck Institute for Plasma Physics, Max Planck Society;

/persons/resource/persons109390

Hildebrandt, D.
Plasma Diagnostics Group (HUB), Max Planck Institute for Plasma Physics, Max Planck Society;

/persons/resource/persons108745

Bolt, H.
Material Research (MF), Max Planck Institute for Plasma Physics, Max Planck Society;

Externe Ressourcen

Es sind keine externen Ressourcen hinterlegt

Volltexte (beschränkter Zugriff)

Für Ihren IP-Bereich sind aktuell keine Volltexte freigegeben.

Volltexte (frei zugänglich)

Es sind keine frei zugänglichen Volltexte in PuRe verfügbar

Ergänzendes Material (frei zugänglich)

Es sind keine frei zugänglichen Ergänzenden Materialien verfügbar

Zitation

Laux, M., Schneider, W., Wienhold, P., Jüttner, B., Huber, A., Balden, M., et al. (2003). Arcing at B₄C-covered limiters exposed to a SOL-plasma. Journal of Nuclear Materials, 313-316, 62-66. doi:10.1016/S0022-3115(02)01333-8.

Zitierlink: https://hdl.handle.net/11858/00-001M-0000-0027-2329-0

Zusammenfassung

Plasma sprayed B₄C-layers considered as wall coatings for the W7X stellarator have been studied during and after exposure to TEXTOR and after arcing experiments in vacuum. Arcing through the B₄C layer occurred favoured by high power fluxes and not restricted to less stable phases. But this arcing implies an especially noisy scrape-off layer (SOL). Instead of moving retrograde in the external magnetic field, the arc spot on the B₄C-layer sticks to the same location for its whole lifetime. Consequently, the arc erodes the entire B₄C layer, finally burning down to the Cu substrate. In the neighbourhood of craters the surface contains Cu originating from those craters. This material, hauled to the surface by the arc, is subject to subsequent erosion, transport, and redeposition by the SOL-plasma. The behaviour of arcs on B₄C is most probably caused by the peculiar temperature dependences of the electrical and heat conductivity of B₄C.