The construction of an X-ray tube is very complex in detail. In addition to the electrodes and the target, it has a large number of components for focusing the beam, electrode heating, and other functions.  Due to the required   measurement accuracy, the temperature plays a prominent role when using X-ray tubes in coordinate measuring  machines.  Because X-ray tubes in general have a low efficiency level, there is a relatively large power loss. This is removed from the measuring machine by a suitable liquid cooling system with heat exchangers.