Cooled stationary anode for an x-ray tube

Abstract

An X-ray tube 10 with an anode 30 comprising at least a rod shaped body with a front wall having target area 32 as target for an electron beam 27 on its frontal side provides a high intensity of X-ray radiation if the anode 30 has at least one cavity extending to the front wall, the cavity having a coating 50 of at least one inorganic salt.

Description

technical field [0001] The invention relates to a stationary anode for cooling of an X-ray tube and to an X-ray tube. Background technique [0002] X-ray tubes are of considerable importance in medical imaging, especially as X-ray sources for CT-scanners. Of course, X-ray tubes are equally important in other technical fields such as, to name a few, the determination of crystal structures (see, for example, Ashcroft Mermin's Solid State Physics, Sanders University Press, Chapter 6 ), or fast and reliable radiography which is already commonly used by Customs. These applications require high radiation powers to obtain detailed information about objects that need to undergo X-ray based analysis. [0003] Briefly, X-rays are produced by the sharp deceleration of pre-accelerated electrons. For this purpose, the X-ray tube includes a cathode, usually in the form of a helical wire. By applying an electric current to the filament, the filament is heated to induce thermal emission...

AI Technical Summary

Problems solved by technology

Unfortunately, the high kinetic energy of the electrons incident on the anode is converted not only into short-wavelength radiation, but also into heat

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