A contemporary dental X-ray tube. The heated cathode is about the left. Centre is definitely the anode which is comprised of tungsten and embedded while in the copper sleeve.William Coolidge explains clinical imaging and X-rays. An X-ray tube is actually a vacuum tube that converts electrical input energy into X-rays.[one] https://tungsten-tubes99865.tribunablog.com/the-greatest-guide-to-tungsten-tubes-42650241