NDLI: The cathode spot of a high-current vacuum arc as a multiecton phenomenon

Content Provider	IEEE Xplore Digital Library
Author	Mesyats, G.A. Barengolts, S.A.
Copyright Year	1973
Abstract	The operation of the cathode spot of a high-current vacuum arc is treated in terms of the ecton model. It has been demonstrated that, in this case, the cathode spot cells are grouped to adjoin one another. The existence of such,a collective spot is due to the cumulative effect of a number of microexplosions, resulting in that the current density in the spot increases by-almost an order of magnitude. Moreover, in such a spot, conditions are realized which are energetically profitable for the repetition of ecton processes, namely, an elevated temperature of the surface and an increased density of the near-cathode plasma. The parameters of a collective cathode spot, such as the crater diameter, the current density, and the lifetime, have been related to the arc current. The predicted relationships are in good agreement with experimental results. It has been shown that as the arc current increases, the current density in the cathode spot drops, resulting in division of the spot. An estimate of the limiting arc current per unit spot has been obtained.
Sponsorship	IEEE Nuclear and Plasma Sciences Society
Starting Page	704
Ending Page	707
Page Count	4
File Size	64988
File Format	PDF
ISSN	00933813
Volume Number	29
Issue Number	5
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2001-10-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Cathodes Vacuum arcs Current density Plasma temperature Threshold current Copper Plasma density Electrons Tungsten Critical current
Content Type	Text
Resource Type	Article
Subject	Nuclear and High Energy Physics Condensed Matter Physics

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