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Carbon nanotubes as electron source in an x-ray tube

Domenii publicaţii > Fizica + Tipuri publicaţii > Articol în revistã ştiinţificã

Autori: H. Sugie, M. Tanemura, V. Filip, K. Iwata, K. Takahashi, and F. Okuyama

Editorial: Applied Physics Letters, 78(17), p.2578-2580, 2001.

Rezumat:

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 non ultrahigh vacuum ambience. At a pressure of 2107 Torr, the nanotube emitters continue to emit electrons for more than 1h, and yield better resolved x-ray images than do thermionic emitters, independently of whether the sample is biological or non biological. 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.

Cuvinte cheie: Carbon nanotubes, Electron sources, X-rays