Science Fair Project Encyclopedia
Vacuum arc
A vacuum arc arises when the surface of metal electrodes in contact with a good vacuum begin to emit electrons because of heating or through exceeding the metal's Work function. Once initiated, a vaccum arc can persist because the freed particles will heat the metal surface via high speed particle collisions, freeing more particles and continuing the arc.
Last updated: 08-28-2005 17:09:40
10-26-2009 08:16:03
The contents of this article is licensed from www.wikipedia.org under the GNU Free Documentation License. Click here to see the transparent copy and copyright details
The contents of this article is licensed from www.wikipedia.org under the GNU Free Documentation License. Click here to see the transparent copy and copyright details