A hot refractory anode vacuum arc: nonstationary plasma model

Author

Beilis, Isak I. ; Boxman, Raymond L. ; Goldsmith, S.

Author_Institution

Dept. of Interdisciplinary Studies, Tel Aviv Univ., Israel

Volume

29

Issue

5

fYear

2001

fDate

10/1/2001 12:00:00 AM

Firstpage

690

Lastpage

694

Abstract

A plasma model for a new form of arc operated initially as a multicathode-spot vacuum arc and material from the cathode spot jets deposits on the anode is proposed. The arc named hot refractory anode vacuum arc (HRAVA) has a thermally isolated anode and cooled cathode. The plasma model considers the re-evaporation of the deposit cathode material from the heated anode and the interaction of the cathode spot plasma jets with anode plasma. A system of time-dependent equations were formulated and solved for the heat flux from the plasma to the anode surface, heat conduction within the anode, electron energy balance, and heavy particle conservation in the anode plasma plume. The calculations show that the plasma electron temperature decreases while the anode temperature increases with time

Keywords

anodes; plasma jets; plasma transport processes; vacuum arcs; anode effective voltage; anode heat conductance; anode plasma plume; anode surface; anode temperature; cathode plasma jet interaction; cathode spot jets; cooled cathode; deposited cathode material; deposits; electron energy balance; heat conduction; heat flux; heated anode; heavy particle conservation; hot anode; hot refractory anode vacuum arc; nonstationary plasma model; plasma electron temperature; plasma energy balance; radial plasma flux; re-evaporation; thermally isolated anode; time-dependent equations; Anodes; Cathodes; Electrons; Plasma applications; Plasma density; Plasma materials processing; Plasma measurements; Plasma temperature; Temperature measurement; Vacuum arcs;

fLanguage

English

Journal_Title

Plasma Science, IEEE Transactions on

Publisher

ieee

ISSN

0093-3813

Type

jour

DOI

10.1109/27.964455

Filename

964455