Theoretical Research on a Multibeam-Modulated Electron Gun Based on Carbon Nanotube Cold Cathodes
Milne, William I
IEEE Transactions on Electron Devices
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Yuan, X., Wang, B., Cole, M., Zhang, Y., Deng, S., Milne, W. I., & Yan, Y. (2016). Theoretical Research on a Multibeam-Modulated Electron Gun Based on Carbon Nanotube Cold Cathodes. IEEE Transactions on Electron Devices https://doi.org/10.1109/TED.2016.2565583
Multi-beam modulation in a carbon nanotube (CNT) cold cathode electron gun is herein investigated in order to develop miniaturized and fully integrated vacuum electron devices. By exposing the electron source to a millimeter-wave signal, the steady-state field emission current density is efficiently modulated by the incident high-frequency (HF) electric field. Our simulation results of this multi-beam electron gun show that the field emission current density can be efficiently modulated by different incident frequency millimeter waves. We find that the modulation depth is increased by enhancing the HF input power and anode operation voltage. The modulation frequency and phase of each electron beam can be controlled using a single millimeter-wave source and by simply adjusting the lateral distance between adjacent CNT cold cathodes.
carbon nanotube (CNT), cold cathode, electron gun, multibeam
This work was supported in part by the National Basic Research Program of China under Grant 2013CB933603 and in part by the National Natural Science Foundation of China under Grant U1134006 and Grant 6110104.
External DOI: https://doi.org/10.1109/TED.2016.2565583
This record's URL: https://www.repository.cam.ac.uk/handle/1810/256170