Open AccessEffect of a longitudinal magnetic field on the emission characteristics of a forevacuum plasma electron source based on a hollow cathode discharge
Author(s) -
I. Yu Bakeev,
А. А. Зенин,
А. С. Климов,
Е. М. Окс
Publication year - 2021
Publication title -
prikladnaâ fizika
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.205
H-Index - 7
ISSN - 1996-0948
DOI - 10.51368/1996-0948-2021-4-5-11
Subject(s) - cathode , plasma , atomic physics , electron , field electron emission , magnetic field , current (fluid) , materials science , chemistry , physics , nuclear physics , quantum mechanics , thermodynamics
The effect of a longitudinal magnetic field on the emission characteristics of a forevacuum plasma electron source based on a discharge with a hollow cathode is studied. It is shown that, starting from a certain threshold value of the induction Bc, the magnetic field leads to a decrease in the plasma concentration on the axis of the cathode cavity. With a decrease in the diameter of the cathode cavity, the threshold value of Bc increases. On the other hand, the longitudinal magnetic field makes it possible to increase the diameter of the emission chan-nel, which contributes to a significant increase in the current of electron emission from the plasma. In this case, the degree of increase in the emission current is determined by the ge-ometry of the cathode cavity and the pressure of the working gas.