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Stationary anode of x-ray tube|Vacuum Brazing components for fixed anode X-ray tube

Application: Fixed anode X-ray tube

The anode is supported on vacuum bearings and can be rotated by electromagnetic induction from a series ofstator windings outside the evacuated tube. Typically, eddy currents are induced in a rotatable metal cylinder, the rotor. 

The anode must be constructed of high temperature materials. The focal spot temperature can reach 2,500 °C (4,530 °F) during an exposure, and the anode assembly can reach 1,000 °C (1,830 °F) following a series of large exposures. 

Increasing demand for high-performance Computed tomography (CT) scanning and angiography systems has driven development of very high performance medical X-ray tubes. Contemporary CT tubes have power ratings of up to 100 kW and anode heat capacity of 6 MJ, yet retain an effective focal spot area of less than 1 mm².