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Updated: May 24, 2026

Preparing a Celadonite Electron Source and Estimating Its Brightness
Published on: November 5, 2019
Low-energy, high-current, ion source with cold electron emitter
A V Vizir1, M V Shandrikov, G Yu Yushkov
1High Current Electronics Institute, Russian Academy of Sciences, Tomsk 634055, Russia. vizir@opee.hcei.tsc.ru
Abstract:
An ion source based on a two-stage discharge with electron injection from a cold emitter is presented. The first stage is the emitter itself, and the second stage provides acceleration of injected electrons for gas ionization and formation of ion flow (<20 eV, 5 A dc). The ion accelerating system is gridless; acceleration is accomplished by an electric field in the discharge plasma within an axially symmetric, diverging, magnetic field. The hollow cathode electron emitter utilizes an arc discharge with cathode spots hidden inside the cathode cavity. Selection of the appropriate emitter material provides a very low erosion rate and long lifetime.
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