Carbon Nanotube Cathodes for Electron Gun

Carbon Nanotube Cathodes for Electron Gun

Two carbon nanotubes cold cathodes, employable in electron guns for linear vacuum tubes (traveling-wave tubes, Klystron), are realized considering an extracting grid in two different configurations: integrated or externally mounted. The electron field emission of the two cathodes is measured to comp...

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Veröffentlicht in:IEEE electron device letters 2013-05, Vol.34 (5), p.698-700
Hauptverfasser: Ulisse, Giacomo, Brunetti, Francesca, Tamburri, Emanuela, Orlanducci, Silvia, Cirillo, Matteo, Terranova, Maria Letizia, Carlo, Aldo Di
Format: Artikel
Sprache:eng
Schlagworte:
Applied sciences
Carbon nanotubes
Carbon nanotubes (CNTs)
Cathodes
Circuit properties
cold cathodes
Current density
Electric, optical and optoelectronic circuits
Electron guns
Electron tubes
Electronic tubes, masers
Electronics
Exact sciences and technology
Microwave circuits, microwave integrated circuits, microwave transmission lines, submillimeter wave circuits
microwave vacuum amplifier
Molecular electronics, nanoelectronics
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
Silicon
Vacuum microelectronics
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Zusammenfassung:Two carbon nanotubes cold cathodes, employable in electron guns for linear vacuum tubes (traveling-wave tubes, Klystron), are realized considering an extracting grid in two different configurations: integrated or externally mounted. The electron field emission of the two cathodes is measured to compare the two devices. In an external extracting grid, a transparency of 72% and a maximum current density of 3.2 mA/cm 2 are obtained, whereas in the integrated grid device, a transparency of 75% and a maximum current density of 74 mA/cm 2 are obtained. The high transparency achieved makes the two cathodes attractive for low power consumption vacuum tubes.
ISSN:0741-3106
1558-0563
DOI:10.1109/LED.2013.2250247