VACUUM-SEALED SMALL X-RAY TUBE USING CARBON NANOTUBE-BASED ELECTRON BEAM EMITTER

摘要

Disclosed is a vacuum-sealed small X-ray tube using a carbon nanotube electron beam emitter. The vacuum-sealed small X-ray tube using a carbon nanotube electron beam emitter comprises: an electron beam generating unit having a cylindrical focusing electrode and drawing out an electron beam through a field-emission emitter inserted into the center of the focusing electrode; a ceramic tube inserted to one side of the electron beam generating unit to enclose the focusing electrode; a transmission X-ray target arranged in the direction of drawing out of the electron beam and constituted by an X-ray transmission window against which the electron beam collides to generate radiotherapy beams and which radiates ionizing radiation to the atmosphere; and a connection anode interposed between the transmission X-ray target and the ceramic tube.