SUPER MINIATURE X-RAY TUBE USING NANO MATERIAL FIELD EMITTER

Abstract

A super miniature X-ray tube using the nano material field emitter includes a tip-tip-type cathode electrode having the nano material field emitter formed on one end with a planar section thereof to generate an electron beam, a gate electrode formed in a hollow cylindrical shape and surrounding an outer circumference of the cathode electrode, the gate electrode having a tapered portion formed on one end and inclined from inside to outside, the gate electrode receiving a voltage for generating the electron beam, a high voltage insulating portion formed in a hollow cylindrical shape and surrounding an outer circumference of the gate electrode, a anode electrode formed at a predetermined distance from one end of the high voltage insulating portion and receiving an acceleration voltage to accelerate an electron beam generated at the cathode electrode, and an electric field adjusting electrode formed between the high voltage insulating portion and the anode electrode to vary a pattern of an acceleration electric field, wherein the cathode electrode includes an open portion formed on one side to receive therein the electric field adjusting electrode, and an X-ray generating portion formed on the other side to generate an X-ray by a collision of an accelerated electron beam.