Title :
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
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;
Conference_Titel :
Discharges and Electrical Insulation in Vacuum (ISDEIV), 2012 25th International Symposium on
Conference_Location :
Tomsk
Print_ISBN :
978-1-4673-1263-9
Electronic_ISBN :
1093-2941
DOI :
10.1109/DEIV.2012.6412455
