plasma cathode

plasma cathode

[′plaz·mə ′kath‚ōd]
(electronics)
A cathode in which the source of electrons is a gas plasma rather than a solid.
References in periodicals archive ?
The work will develop and integrate a novel plasma cathode electron source with an EBM machine focusing on realising the enhanced capabilities of low maintenance, consistent manufacturing performance and higher productivity.
Plasma cathode electron sources; physics, technology, applications.
As compared to the more commonly employed thermionic cathode approach for electron-beam formation, plasma cathode or plasma electron emitter approaches can produce greater emission current density, are capable of pulsed beam generation, can operate over a wide range of back-ground gas pressure, and are only weakly dependent on the residual vacuum conditions, among other advantages which make them attractive for applications such as electron-beam welding and powder cladding, modification of material surface properties, generation of electromagnetic raditaino, plasma chemical and radiation technologies, and more.