Abstract: A source of X-rays encompassing a rotating target is provided with a detector of X-rays located outside a port of a housing of the source and positioned at or near a tangent line to the radiating surface for observing variations in the radiation intensity due to rotation of the target, the variations being pronounced due to the heel effect of the radiation pattern. In one embodiment, the X-ray detector employs a scintillation material and is coupled by a light pipe to a photodetector which is removed from the path of the radiation and detects scintillations of the X-ray detector. Alternatively, the photodetector and light pipe may be deleted by the use of a detector of germanium, silicon or an ion chamber which converts X-ray photons directly to an electric current.

Abstract: An X-ray tube test system comprising signal processing circuitry including means for converting an analog signal representative of anode current into a train of pulses having an instantaneous frequency proportional to corresponding instantaneous amplitude values of the analog signal, means for counting the pulses in the train during an exposure time interval to obtain an integrated milliampere-second (MAS) value, means for summing a train of pulses having a uniform frequency during an interval of time equivalent to the exposure time interval to obtain an integral value for the exposure time, means for optionally dividing the MAS value by the exposure time value to obtain an average anode current (MA) value during the exposure time interval, and means for displaying numerical equivalents of the values thus obtained.

Abstract: A voltage divider comprising a coaxial array of spaced parallel, capacitive plates connected to one another by respective resistive elements disposed between the plates.