Title :
Special features of electron sources with CNT field emitter and micro grid
Author :
Knapp, Wolfram ; Schleubner, Detlef ; Wolff, Helmut
Author_Institution :
Inst. fur Experimentelle Phys., Otto-von-Guericke-Univ., Magdeburg, Germany
Abstract :
A micro-sized electron source has been developed for new vacuum triode applications. The miniaturisation of the electron source was achieved by the use of a carbon nanotube (CNT) field emitter and a micro grid, with a distance of only some micrometers. Because of the threshold field strength for field emission of CNTs being in the range 1 to 5 V/μm, the grid voltage can be lower than 100 V. In our contribution, we discuss the influence of the micro grid on electron source properties, especially anode field penetration through the micro grid, and micro-lensing effect.
Keywords :
carbon nanotubes; electron sources; nanotube devices; triodes; 100 V; anode field penetration; carbon nanotube field emitter; electron source properties; field emission; grid voltage; micro grid; microlensing effect; micrometers; microsized electron source; threshold field strength; vacuum triode applications; Anodes; Carbon nanotubes; Cathodes; Electron emission; Electron sources; Fabrication; Insulation; Laboratories; Propulsion; Voltage;
Conference_Titel :
Vacuum Electron Sources Conference, 2004. Proceedings. IVESC 2004. The 5th International
Print_ISBN :
0-7803-8437-7
DOI :
10.1109/IVESC.2004.1414154
