From Field Emission to Vacuum Arc Ignition: A New Tool for Simulating Copper Vacuum Arcs | Zendy

Timko H. | Zendy; Ness Sjobak K. | Zendy; Mether L. | Zendy; Calatroni S. | Zendy; Djurabekova F. | Zendy; Matyash K. | Zendy; Nordlund K. | Zendy; Schneider R. | Zendy; Wuensch W. | Zendy

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From Field Emission to Vacuum Arc Ignition: A New Tool for Simulating Copper Vacuum Arcs

Author(s) -

Timko H.,

Ness Sjobak K.,

Mether L.,

Calatroni S.,

Djurabekova F.,

Matyash K.,

Nordlund K.,

Schneider R.,

Wuensch W.

Publication year - 2015

Publication title -

contributions to plasma physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.531

H-Index - 47

eISSN - 1521-3986

pISSN - 0863-1042

DOI - 10.1002/ctpp.201400069

Subject(s) - vacuum arc , cathode , plasma , common emitter , ignition system , electric arc , materials science , current (fluid) , arc (geometry) , field electron emission , copper , mechanics , electrode , atomic physics , physics , optoelectronics , electron , chemistry , thermodynamics , mechanical engineering , metallurgy , nuclear physics , quantum mechanics , engineering

Understanding plasma initiation in vacuum arc discharges can help to bridge the gap between nano‐scale triggering phenomena and the macroscopic surface damage caused by vacuum arcs. We present a new twodimensional particle‐in‐cell tool to simulate plasma initiation in direct‐current (DC) copper vacuum arc discharges starting from a single, strong field emitter at the cathode. Our simulations describe in detail how a sub‐micron field emission site can evolve to a macroscopic vacuum arc discharge, and provide a possible explanation for why and how cathode spots can spread on the cathode surface. Furthermore, the model provides us with a prediction for the current and voltage characteristics, as well as for properties of the plasma like densities, fluxes and electric potentials in a simple DC discharge case, which are in agreement with the known experimental values. (© 2015 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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