CUED Publications database

Carbon nanotube based cathodes for microwave amplifiers

Legagneux, P and Sech, NL and Guiset, P and Gangloff, L and Cojocaru, C and Schnell, JP and Pribat, D and Teo, KBK and Robertson, J and Milne, WI and André, F and Rozier, Y and Dieumegard, D (2009) Carbon nanotube based cathodes for microwave amplifiers. 2009 IEEE International Vacuum Electronics Conference, IVEC 2009. pp. 80-81.

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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/cm 2 electron beam. ©2009 IEEE.

Item Type: Article
Divisions: Div B > Solid State Electronics and Nanoscale Science
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 19:32
Last Modified: 21 Dec 2017 01:46