Relation Between Cathode Processes and Voltage Instabilities of Low Current Vacuum Arc

Author

Bochkarev, M.B.

Author_Institution

Inst. of Electrophys., Russian Acad. of Sci., Yekaterinburg

Volume

1

fYear

2006

fDate

25-29 Sept. 2006

Firstpage

423

Lastpage

426

Abstract

An image of the cathode spot of low-current (3-6 A) vacuum arc on copper was observed by streak camera with temporal resolution up to 2 ns and spatial resolution of 10 nm. Waveforms of arc current and voltage were recorded simultaneously and synchronized to the streak sweep with an accuracy of 4 ns. It was found that in general the relation between the arc voltage and cathode spot luminosity is not direct. There are luminosity fluctuations at virtually steady voltage. Meanwhile, in the case of unstable voltage, the splash of luminosity leads to the decrease of voltage and to the increase of arc current

Keywords

copper; stability; streak cameras; vacuum arcs; 3 to 6 A; arc current waveforms; arc voltage; cathode processes; cathode spot luminosity; copper; low current vacuum arc; streak camera; voltage instabilities; Cameras; Cathodes; Copper; Fluctuations; Low voltage; Plasmas; Rough surfaces; Spatial resolution; Surface roughness; Vacuum arcs;

fLanguage

English

Publisher

ieee

Conference_Titel

Discharges and Electrical Insulation in Vacuum, 2006. ISDEIV '06. International Symposium on

Conference_Location

Matsue

ISSN

1093-2941

Print_ISBN

1-4244-0191-7

Electronic_ISBN

1093-2941

Type

conf

DOI

10.1109/DEIV.2006.357322

Filename

4194902