Very stable large current density printed carbon nanotube field-emission cathode applied in electron gun

Author

Cairu Yu ; Jing Liu ; Qilong Wang ; Zhuoya Zhu ; Yunsong Di ; Xiaobing Zhang

Author_Institution

Sch. of Electron. Sci. & Eng., Southeast Univ., Nanjing, China

fYear

2015

fDate

27-29 April 2015

Firstpage

1

Lastpage

2

Abstract

We have fabricated large current density cold cathodes based on the printed carbon nanotubes(CNTs), which are applied in the compact vacuum electron devices including X-ray sources and microwave tubes. The peak value of the cathode current in the diode structure driven by DC voltage is up to 19.88mA (current density: ~2.51A/cm²), along with the fluctuations of the current smaller than 5.3% during the period of about 27 hours. The experimental results show that printed CNTs have the potential as field emission electron sources.

Keywords

carbon nanotubes; cathodes; electron field emission; electron guns; vacuum microelectronics; X-ray sources; compact vacuum electron devices; electron gun; large current density cold cathodes; large current density field emission cathode; microwave tubes; printed carbon nanotube field emission cathode; stable field emission cathode; Carbon nanotubes; Cathodes; Cooling; Current density; Electron tubes; Stability analysis; Water; carbon nanotubes; field emission; large current density;

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.2015.7224051

Filename

7224051