Carbon nanotube field emission electron gun for traveling-wave tube

Author

Wei Wei ; Yixiong Zheng ; Xinyu Yuan ; Yan Wang ; Bing Liu ; Xuebing Wang ; Zexiang Chen

Author_Institution

Sch. of Optoelectron. Inf., Univ. of Electron. Sci. & Technol. of China, Chengdu, China

fYear

2015

fDate

27-29 April 2015

Firstpage

1

Lastpage

2

Abstract

We report a carbon nanotube (CNT) field emission electron gun for traveling-wave tube (TWT), in which a patterned CNT bundle array grown by microwave plasma enhanced chemical vapor deposition was employed as electron source with a maximum electron current density of 4.5A/cm². A dual focus lens was designed to achieve a 3.3:1 compress ratio in diameter of electron beam and very small convergence angle as well as nice good laminarity.

Keywords

carbon nanotubes; chemical vapour deposition; current density; electron field emission; electron guns; electron sources; travelling wave tubes; carbon nanotube field emission electron gun; dual focus lens; electron current density; electron source; microwave plasma enhanced chemical vapor deposition; patterned CNT bundle array; traveling-wave tube; Carbon dioxide; Cathodes; Electron tubes; Microwave amplifiers; Nanotubes; Substrates; carbon nanotube; electron gun; field emission; traveling-wave tube;

fLanguage

English

Publisher

ieee

Conference_Titel

Vacuum Electronics Conference (IVEC), 2015 IEEE International

Conference_Location

Beijing

Print_ISBN

978-1-4799-7109-1

Type

conf

DOI

10.1109/IVEC.2015.7224016

Filename

7224016