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Cathode erosion of metal vapour arcs in vacuum

, 1978
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Erosion of contacts by arcing

Journal of the Institution of Electrical Engineers, 1961
The effect of the current waveshape on the rate of arc erosion is studied for currents of 180-1090 amp, with contacts of molybdenum, steel and a sintered mixture of tungsten and copper. The amount of arc erosion is found to increase with the current amplitude for a constant arc charge.
M.A.B. El-Koshairy, M. Khalifa, F. Aboul-Makarem   +2 more
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First wall erosion by arcing

Journal of Nuclear Materials, 1984
Abstract In high temperature plasma experiments arc tracks are found on all wall areas in close contact with the plasma. The craters of such arc tracks, which are the same as for vacuum arcs, were investigated in more detail. The investigation was done with an optical microscope and a scanning electron microscope.
W.H. Zhao, A. Koch, U.H. Bauder, R. Behrisch   +3 more
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Cathode Erosion in Vacuum Arcs and Unipolar Arcs

Beiträge aus der Plasmaphysik, 1981
AbstractThe cathode spots from vacuum arcs on 316 stainless steel are compared with the tracks found on the same material after exposure to the plasma of the tokamak TFR 600. Further the erosion yields of vacuum arc cathodes of 316 stainless steel and titanium are determined from experiments and the measured values are compared with theoretical ...
Nuernberg, A., Bauder, U., Mooser, C., Behrisch, R.   +3 more
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Tungsten erosion by arcs in ASDEX upgrade

Journal of Nuclear Materials, 2011
The transition from carbon to high-Z divertor devices reduces the erosion of the plasma facing components (PFC) strongly. Arcing as second erosion mechanism beside physical sputtering may now dominating the erosion. A procedure based on photographic techniques, profilometry and scanning electron microscopy was developed to investigate arc damage in ...
Rohde, V., Endstrasser, N., von Toussaint, U., Balden, M., Lunt, T., Neu, R., Hakola, Antti, Bucalossi, J., ASDEX Upgrade Team   +8 more
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Arc penetration to the arc chute and arc chute plates erosion

Electrical Contacts - 1996. Proceedings of the Forty-Second IEEE Holm Conference on Electrical Contacts. Joint with the 18th International Conference on Electrical Contacts, 2002
In a recent paper the problems of arc quenching in arc chute were discussed. It is shown that arc lifetime essentially depends on method of arc introduction to the arc chute, since the arc tries repelling from the edges of plates conditioned by electrical forces side by side with attraction from magnetic forces if the plates are ferromagnetic.
V. Kapustin, D. Podolsky, V. Mestcherjakov   +2 more
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Surface Erosion by Electrical Arcs

1986
On the vessel walls of high temperature plasma experiments traces of cathode spots from electrical arcs have been observed. They originate from short metal plasma discharges which can be ignited at the walls due to the Langmuir sheath potential in front of the walls and thus the hydrogen plasma acts as the anode.
Behrisch, R., Post, D., Behrisch, R.
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The influence of electrode erosion on fault arc

2015 3rd International Conference on Electric Power Equipment – Switching Technology (ICEPE-ST), 2015
A two-dimensional model for fault arc in a closed chamber is developed based on magnetic-hydrodynamic theory to investigate the effect of metal vapour eroded from copper electrodes on fault arc. The conservation equation for mass fraction of copper vapour is added to traditional mass, momentum and energy equations.
Mei Li, Mingzhe Rong, Yi Wu, Junpeng Zhang, Yifei Wu   +4 more
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