X-ray tube arrangements

Claim 1

An arrangement for monitoring repetitive movement of a source of X-radiation along an elongated, X-ray emissive anode/target member, included in an X-ray tube, as a result of repetitive deflection of a beam of electrons, generated in said tubes, to and fro along said member, wherein the deflection is effected by deflection means associated with the tube and supplied with repetitively occurring deflection waveforms, the arrangement including detector means having a plurality of detector devices disposed to receive said radiation through a common aperture dimensioned to cause the radiation to shift across said devices as said movement occurs, said devices producing electrical output signals indicative of the actual progress of said movement, means for generating datum electrical signals indicative of the desired progress of said movement, means for comparing said electrical output signals with said datum electrical signals to produce error signals indicative of discrepancy between said actual progress and said desired progress, and means utilizing said error signals to modify said deflection waveforms in a sense tending to reduce such discrepancy.