Computer-aided reconstruction of the cathode image in high current vacuum arc from the results of high speed photography

Author

Afanas´ev, V.P. ; Chaly, A.M. ; Logatchev, A.A. ; Nik, S. M Shkol ; Zabello, K.K.

Author_Institution

A.F. Ioffe Physicotech. Inst., Acad. of Sci., St. Petersburg, Russia

Volume

1

fYear

2000

fDate

2000

Firstpage

231

Abstract

The images of the cathode, obtained by the method of high speed photography, are of ellipsoidal form as they are taken at the small (about 10 degrees) angle to the cathode surface. For this reason it is very difficult, if possible at all, to make conclusions about the spatial distribution of cathode spots and current density over the cathode surface. One can perform inverse parallel projection, but previously it is necessary to clean the image from the noise occurring from the plasma radiation and from other noise sources. In this paper, the authors propose the method of image filtering, based on contours of equal intensity evaluation and subsequent estimation of the current density on the cathode

Keywords

cathodes; current density; high-speed optical techniques; image reconstruction; insulation testing; photography; vacuum arcs; vacuum insulation; cathode image reconstruction; cathode spots spatial distribution; cathode surface current density; high speed photography; high-current vacuum arc; image filtering; inverse parallel projection; noise sources; plasma radiation; Cathodes; Current density; Digital filters; Filtering; Image reconstruction; Photography; Plasmas; Surface cleaning; Surface discharges; Vacuum arcs;

fLanguage

English

Publisher

ieee

Conference_Titel

Discharges and Electrical Insulation in Vacuum, 2000. Proceedings. ISDEIV. XIXth International Symposium on

Conference_Location

Xi´an

Print_ISBN

0-7803-5791-4

Type

conf

DOI

10.1109/DEIV.2000.877292

Filename

877292