Angular distribution of ion current emerging from an aperture anode in a vacuum arc

Author

Cohen, Yuval ; Boxman, Raymond L. ; Goldsmith, S.

Author_Institution

Electr. Discharge & Plasma Lab., Tel Aviv Univ., Israel

Volume

17

Issue

5

fYear

1989

fDate

10/1/1989 12:00:00 AM

Firstpage

713

Lastpage

716

Abstract

The ion current distribution emerging from a vacuum arc between a Cu cathode and a conical ring anode was measured by a set of five probes. It was found that: (1) the total ion current emerging through the anode was 8.5% of the arc current; (2) the measured ion distribution without a magnetic field was a slightly flattened cosinusoidal function; (3) with an axial magnetic field, the ion current distribution became peaked along the z axis; (4) the total ion current extracted through the anode aperture slightly increased with the magnetic field; and (5) an anode with a larger aperture exhibited less magnetic collimation

Keywords

arcs (electric); ion sources; plasma transport processes; Cu cathode; angular distribution; aperture anode; axial magnetic field; conical ring anode; current distribution; ion current; ion current distribution; magnetic collimation; probes; slightly flattened cosinusoidal function; vacuum arc; Anodes; Apertures; Cathodes; Collimators; Current distribution; Current measurement; Magnetic field measurement; Plasma measurements; Probes; Vacuum arcs;

fLanguage

English

Journal_Title

Plasma Science, IEEE Transactions on

Publisher

ieee

ISSN

0093-3813

Type

jour

DOI

10.1109/27.41187

Filename

41187