Abstract
We fabricated a cold cathode-driven x-ray source with vertically aligned carbon nanotubes (VACNTs). Dose and spatial resolution characteristics are compared to commercially available portable x-ray sources, and our system outperformed its counterparts. At the same 1.0 mAs condition, our x-ray source represented a dose rate of 0.37 mGy/s, which is 7.8 and 2.4 times greater than that of the thermionic emitter and paste carbon nanotubes based commercial x-ray sources, respectively. In addition, our x-ray source represented better image resolution by achieving a nominal focal spot size of 0.35 mm. We believe that high quality x-ray properties were attained, thanks to the narrow electron beam divergence and high reduced brightness of the electrons from VACNTs, and that this will open up advanced x-ray applications.
Original language | English |
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Article number | 023203 |
Journal | Journal of Vacuum Science and Technology B:Nanotechnology and Microelectronics |
Volume | 41 |
Issue number | 2 |
DOIs | |
Publication status | Published - Mar 2023 |
Bibliographical note
Publisher Copyright:© 2023 Author(s).