Electrostatic Beam Focusing of Carbon Nanotubes Electron Source

Author

Ulisse, G. ; Ciceroni, C. ; Brunetti, F. ; Di Carlo, A.

Author_Institution

Dept. of Electron. Eng., Univ. of Rome Tor Vergata, Rome, Italy

Volume

61

Issue

7

fYear

2014

fDate

Jul-14

Firstpage

2558

Lastpage

2563

Abstract

In this paper, we present the realization and characterization of a carbon nanotubes (CNTs) electron gun. The gun consists of a CNT cathode with an external extracting grid, that reached a maximum current density of 0, 6 A/cm², assembled with an electrostatic focusing grid. The realized compact electron gun achieved a maximum output current density of 0, 11 A/cm². This represents one of the first examples of a CNTs electron gun with an electrostatic focusing grid with high-output current density. The assembly process and the relative issues are described in detail together with the field emission characteristics of the cathodes and of the electron gun.

Keywords

carbon nanotubes; cathodes; electron beam focusing; electron guns; C; CNT cathode; carbon nanotubes electron gun; carbon nanotubes electron source; compact electron; electrostatic beam focusing; electrostatic focusing grid; external extracting grid; field emission; Anodes; Assembly; Cathodes; Current density; Electron sources; Focusing; Voltage measurement; Carbon nanotubes (CNTs); cold cathodes; electron gun; field emission; field emission.;

fLanguage

English

Journal_Title

Electron Devices, IEEE Transactions on

Publisher

ieee

ISSN

0018-9383

Type

jour

DOI

10.1109/TED.2014.2324171

Filename

6824772