Cold emission of negative ions from the graphite with the rough surface

Author

Sinelnikov, D.N. ; Kurnaev, V.A. ; Mamedov, N.V. ; Popov, Alexey P.

Author_Institution

Nat. Res. Nucl. Univ. MEPhI, Moscow, Russia

fYear

2012

fDate

2-7 Sept. 2012

Firstpage

80

Lastpage

82

Abstract

The negative ions fraction in the low field emission as function of cathode temperature, residual gas composition and pressure is analyzed. Simultaneous mass analysis of emitted negative ions and residual gas during cathode heating is carried out. The intensity of the emitted negative ions increases linearly with partial pressure of various gases in the range 10^-5-10^-7 Torr. A simple model based on secondary negative ion emission of adsorbed atoms under positive ion bombardment of cathode is proposed.

Keywords

cathodes; graphite; negative ions; positive ions; rough surfaces; secondary electron emission; adsorbed atom; cathode heating; cathode temperature; emitted negative ion intensity; graphite; negative ion cold emission; positive ion bombardment; residual gas composition; rough surface; secondary negative ion emission; simultaneous mass analysis; Anodes; Cathodes; Current measurement; Graphite; Ion emission; Ions; Temperature measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Discharges and Electrical Insulation in Vacuum (ISDEIV), 2012 25th International Symposium on

Conference_Location

Tomsk

ISSN

1093-2941

Print_ISBN

978-1-4673-1263-9

Electronic_ISBN

1093-2941

Type

conf

DOI

10.1109/DEIV.2012.6412455

Filename

6412455