X-RAY TUBE

摘要

PURPOSE: An X-ray tube is provided to reduce spreading of an electronic beam by additionally forming a focused gate mesh between a gate mesh and a focused electrode. CONSTITUTION: An emitter emits an electronic beam. A gate mesh comprises multiple gate holes. A focused gate mesh (306) comprises multiple focused gate holes. A focused electrode (307) focuses the electronic beam which passes through the gate mesh and the focused electrode. An anode electrode (309) generates X-rays by colliding focused electronic beams together.