Ray Boxman <firstname.lastname@example.org>
Subject: Unipolar arcs
Organization: Tel Aviv University
Unipolar arcs are basically cathode spots which ignite on the wall of
the chamber due to their selective negative charging from the more
mobile free electrons in the plasma, even though the wall is
electrically floating. The cathode spot of a vacuum arc is a
concentrated region of electrical current and vapor emission from the
cathode of an arc discharge.
Hope this is helpful.
Prof. Raymond (Reuven) Boxman
Electrical Discharge and Plasma Laboratory
Tel Aviv University
Tel Aviv 69978
visit the Electrical Discharge and Plasma Laboratory web page at: