On the State of Ionization, Non-Ideality and Electric Conductivity of the Cathode Plasma of Vacuum Arcs

✍ Scribed by S. Anders

• Publisher: John Wiley and Sons
• Year: 1986
• Tongue: English
• Weight: 520 KB
• Volume: 26
• Category: Article
• ISSN: 0005-8025
• DOI: 10.1002/ctpp.19860260605

✦ Synopsis

On the State of Ionization, Non-Ideality and Electric Conductivity of the Cathode Plasma of Vacuum Arcs S. QNDERS .ie.adrnry of Sciences of the GDK, Central Institute of Electron l'Ipic$, DDK-1086 Berlin, Hausvoateiplatz 5 / i dhstrsct The cathode spot plasmit of a metal vapour arc in ~I I . C I I U ~I has it high density (1025-1028 m3) with a relatively low temperature (1-5 eV), therefore it is strongly non-ideal. The degree of ionization ~1 and the electric conductivity u of such plesmas are discussed, considering that non-ideality. The burning voltage of the arc U , is estimated with the help of o-values, obtained from theories and measurements for non-ideal copper plasmas. It is shown, that n high current density of the cathode spot of i = 10'2 A/m2 is not in contrudiction to a low burning voltage CT, = 21) -40 V, but these values give a consistent picture of the spot processes.