Theoretical research on electron beam modulation in a field-emission cold cathode electron gun

doi:10.1088/1674-1056/23/3/037901

Abstract In order to develop miniaturized and integrated electron vacuum devices, the electron beam modulation in a field-emission (FE) electron gun based on carbon nanotubes is researched. By feeding a high-frequency field between the cathode and the anode, the steady FE electron beam can be modulated in the electron gun. The optimal structure of the electron gun is discovered using 3D electromagnetism simulation software, and the FE electron gun is simulated by PIC simulation software. The results show that a broadband (74–114 GHz) modulation can be achieved by the electron gun with a rhombus channel, and the modulation amplitude of the beam current increases with the increases in the input power and the electrostatic field.

Keywords: carbon nanotubes cold cathode field emission electron gun

Received: 24 July 2013
Revised: 13 September 2013
Accepted manuscript online:

PACS:	79.70.+q	(Field emission, ionization, evaporation, and desorption)
	07.57.-c	(Infrared, submillimeter wave, microwave and radiowave instruments and equipment)
	41.85.-p	(Beam optics)

Fund: Project supported by the National Basic Research Program of China (Grant No. 2013CB933603) and the National Natural Science Foundation of China (Grant Nos. U1134006 and 61101041).

Corresponding Authors: Yuan Xue-Song
E-mail: yuanxs@uestc.edu.cn

Cite this article:

Li Xing-Xing (李兴兴), Yuan Xue-Song (袁学松), Zhang Yu (张宇), Yan Yang (鄢扬) Theoretical research on electron beam modulation in a field-emission cold cathode electron gun 2014 Chin. Phys. B 23 037901

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Theoretical research on electron beam modulation in a field-emission cold cathode electron gun

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