Title :
Thermionic sources for high-brightness electron beams
Author :
Thomas, Richard E. ; Gibson, John W. ; Haas, George A. ; Abrams, R.H., Jr.
Author_Institution :
US Naval Res. Lab., Washington, DC, USA
fDate :
3/1/1990 12:00:00 AM
Abstract :
The capabilities and limitations of modern thermionic electron sources for producing high-emission-density (>10 A/cm2) high-brightness beams are surveyed. The emphasis is on dispenser cathodes. The fabrication techniques and operating mechanisms that determine the operating limitations of existing commercial cathodes are discussed. In addition, cathode improvements that have been demonstrated in various prototype structures are described
Keywords :
electron beams; electron tube manufacture; thermionic cathodes; dispenser cathodes; electron beams; fabrication techniques; high-brightness beams; high-emission-density; operating mechanisms; prototype structures; thermionic electron sources; Cathodes; Current density; Electron beams; Electron devices; Electron emission; Electron sources; Fabrication; Laboratories; Thermionic emission; Tungsten;
Journal_Title :
Electron Devices, IEEE Transactions on
