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2009•Unpublished venueRequires access

Carbon nanotube based cathodes for microwave amplifiers

P. Legagneux, Nicolas Le Sech, P. Guiset, L. Gangloff, Costel‐Sorin Cojocaru, J. P. Schnell, Didier Pribat, K. B. K. Teo, John Robertson, W. I. Milne, Frederic André, Y. Rozier, D. Dieumegard

Open publisher page 9 citations

Abstract

We have studied two different kinds of electron tubes using a cold field emission cathode as the electron source. This cathode is an array of vertically aligned multiwall carbon nanotubes. The first device is a triode. With this device, we demonstrated the modulation at 32 GHZ of a 1.4 A/cm2 peak current density with a 82% modulation ratio. The second device is a traveling wave tube. For this device, the objective is to test a cathode delivering a 2 A/cm2electron beam.

About this research paper

What this paper is about

We have studied two different kinds of electron tubes using a cold field emission cathode as the electron source. This cathode is an array of vertically aligned multiwall carbon nanotubes. The first device is a triode. With this device, we demonstrated the modulation at 32 GHZ of a 1.4 A/cm2 peak current density with a 82% modulation ratio. The second device is a traveling wave tube. For this device, the objective is to test a cathode delivering a 2 A/cm2electron beam.

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OpenAlex reports 9 citations for this work. Citation counts describe recorded attention and do not establish research quality.

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Available abstract

We have studied two different kinds of electron tubes using a cold field emission cathode as the electron source. This cathode is an array of vertically aligned multiwall carbon nanotubes. The first device is a triode. With this device, we demonstrated the modulation at 32 GHZ of a 1.4 A/cm2 peak current density with a 82% modulation ratio. The second device is a traveling wave tube. For this device, the objective is to test a cathode delivering a 2 A/cm2electron beam.

Key concepts: Triode, Cathode, Carbon nanotube, Traveling-wave tube, Materials science, Cathode ray, Amplifier, Microwave

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