Stationary vacuum arc on the hot non-thermionic cathode

Author

Batenin, V.M. ; Klimovsky, I.I. ; Polistchook, V.P. ; Sinel´shchikov, V.A.

Author_Institution

Inst. of High Temp., Acad. of Sci., Moscow, Russia

Volume

1

fYear

1998

fDate

17-21 Aug 1998

Firstpage

226

Abstract

A vacuum arc with a stationary diffuse spot on a solid chromium cathode has been studied. The arc current was 30-220 A, cathode temperature 1800-2100 K. The mean current density on the cathode was 10-10² A/cm². The part of thermionic current at the cathode was less than 0.1% from the arc current. Observations of cathode surface during arcing with the help of laser monitoring did not discover noticeable arc influence on the cathode. The experimental data on the heat flow from plasma to cathode and the evaporation rate of the cathode in principle allow the conclusion that the charge transfer on the cathode surface is provided presumably by ion current

Keywords

cathodes; chromium; current density; insulation testing; measurement by laser beam; plasma; vacuum arcs; vacuum breakdown; vacuum insulation; 1800 to 2100 K; 30 to 220 A; Cr; arc current; cathode surface; cathode surface observations; cathode temperature; charge transfer; hot nonthermionic cathode; ion current; laser monitoring; mean current density; plasma heat flow; solid chromium cathode; stationary vacuum arc; thermionic current; Cathodes; Charge transfer; Chromium; Current density; Heat transfer; Monitoring; Plasma temperature; Solids; Surface emitting lasers; Vacuum arcs;

fLanguage

English

Publisher

ieee

Conference_Titel

Discharges and Electrical Insulation in Vacuum, 1998. Proceedings ISDEIV. XVIIIth International Symposium on

Conference_Location

Eindhoven

ISSN

1093-2941

Print_ISBN

0-7803-3953-3

Type

conf

DOI

10.1109/DEIV.1998.740613

Filename

740613