Title :
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
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;
Conference_Titel :
Vacuum Electronics Conference (IVEC), 2015 IEEE International
Conference_Location :
Beijing
Print_ISBN :
978-1-4799-7109-1
DOI :
10.1109/IVEC.2015.7224016
