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Area of Science:

  • Physics
  • Materials Science
  • Engineering

Background:

  • Compact X-ray tubes are crucial for various applications.
  • Previous simulations suggested the feasibility of a novel compact X-ray tube design.
  • Experimental validation is necessary to confirm the performance of new X-ray tube components.

Purpose of the Study:

  • To experimentally characterize the primary components of a prototype compact X-ray tube.
  • To validate previous simulation findings for the X-ray tube design.
  • To assess the performance and controllability of the novel X-ray tube.

Main Methods:

  • Characterized the carbon nanotube (CNT)-based cold cathode's current-voltage relationship.
  • Investigated the electrostatic lens's focal spot size control via lens voltage.
  • Analyzed the transmission-type anode's X-ray energy spectra at varying anode voltages.

Main Results:

  • The CNT cold cathode exhibited an exponential-like current-voltage characteristic, consistent with Fowler-Nordheim theory.
  • The electrostatic lens demonstrated controllable focal spot size with a "V" trend in response to lens voltage.
  • Anode voltage effectively controlled the generated X-ray energy spectra from the transmission-type anode.
  • The transmission-type anode's X-ray energy spectrum closely matched that of a conventional reflection-type anode.

Conclusions:

  • The experimental results validate the performance of the prototype compact X-ray tube's components.
  • The study confirms the controllability of key X-ray parameters like focal spot size and X-ray energy.
  • The findings support the potential of this compact X-ray tube design for future applications.