Stationary scanning x-ray source based on carbon nanotube field emitters (original) (raw)

ADS

;

• Yang, G. ;
• Cheng, Y. ;
• Gao, B. ;
• Qiu, Q. ;
• Lee, Y. Z. ;
• Lu, J. P. ;
• Zhou, O.

Abstract

We report a field emission x-ray source that can generate a scanning x-ray beam to image an object from multiple projection angles without mechanical motion. The key component of the device is a gated carbon nanotube field emission cathode with an array of electron emitting pixels that are individually addressable via a metal-oxide-semiconductor field effect transistor-based electronic circuit. The characteristics of this x-ray source are measured and its imaging capability is demonstrated. The device can potentially lead to a fast data acquisition rate for laminography and tomosynthesis with a simplified experimental setup.

Publication:

Applied Physics Letters

Pub Date:

May 2005

DOI:

10.1063/1.1923750

Bibcode:

2005ApPhL..86r4104Z

Keywords:

• 07.85.-m;
• 85.35.Kt;
• 79.70.+q;
• X- and gamma-ray instruments;
• Nanotube devices;
• Field emission ionization evaporation and desorption