LAYERED X-RAY TUBE APPARATUS USING SPACER

摘要

PURPOSE: A layered X-ray tube apparatus using a spacer is provided to reduce the size of an X-ray tube. CONSTITUTION: A cathode(130) ejects electrons through a field emission emitter(132). A gate(140) applies electric field to the field emission emitter through a gate electrode. Focusing electrodes(150,160) focus the electron generated from the cathode. The focused electrons collide with an anode target. An anode(190) generates X-rays.