Carbon nanotubes as electron source in an x-ray tube
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- 23 April 2001
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 78 (17), 2578-2580
- https://doi.org/10.1063/1.1367278
Abstract
Field emitters comprised of aligned carbon nanotubes are shown to be promising as a primary electron source in an x-ray tube working in a nonultrahigh vacuum ambience. At a pressure of 2×10 −7 Torr , the nanotube emitters continue to emit electrons for more than 1 h, and yield better resolved x-rayimages than do thermionic emitters, independently of whether the sample is biological or nonbiological. The near-uniformity in energy distribution of electrons emitted from carbon nanotubes might be related to the improved image quality in the field-emission mode.Keywords
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