A SIMPLE-MODEL OF A GLOW-DISCHARGE ELECTRON-BEAM FOR MATERIALS PROCESSING

Citation
Ji. Etcheverry et al., A SIMPLE-MODEL OF A GLOW-DISCHARGE ELECTRON-BEAM FOR MATERIALS PROCESSING, IEEE transactions on plasma science, 25(3), 1997, pp. 427-432
Citations number
18
Categorie Soggetti
Phsycs, Fluid & Plasmas
ISSN journal
00933813
Volume
25
Issue
3
Year of publication
1997
Pages
427 - 432
Database
ISI
SICI code
0093-3813(1997)25:3<427:ASOAGE>2.0.ZU;2-P
Abstract
A simple semiempirical model of the electron beam generated by a pulse d cold cathode electron gun has been developed. The model describes an alytically the observed self-focusing of the discharge and predicts th e dynamical variation of the focal distance, in good agreement with ex periments, This effect plays a major role in the determination of the effective duration of the energy pulse, The model was used to conduct simple calculations of energy thresholds for melting of solid material s, giving helpful insight on ranges of operation of this kind of elect ron gun for its application to material processing, A comparison with available experimental data for Mg70Zn30 samples is given.