Effective applied voltage as an indicator of the radiation emitted by an x-ray tube
Bureau of Standards Journal of Research
A previous study 1 suggested a parallelism between the applied effective voltige and the emission of an X-ray tube. The investigation has been carried further under more carefully controlled conditions. It is found for two mechanical rectifiers and one "constant potential" generator that the X-ray emission per effective (root-mean-square) milliampere of tube current is about the same for all generators operating at the same effective (r. m. s.) voltage (the radiation passing through the same
... through the same filter in all cases) . Thus it becomes possible to express all radiations in terms of that excited by constant potential. This leads to a simplification in the description and reproduction of irradiation conditions in biological work. Although the study has been limited to three generators, it is believed that they are sufficiently typical to warrant generalization. length distribution, for the period of a complete cycle, is calculable. Because of the presence of tungsten line radiation about 70 kv, it is not yet practicable to predict the total X-ray energy by integrating over one cycle of the voltage wave. In the present work the X-ray emission per unit tube current, as it varies with peak voltage, with average voltage, and with effective voltage per unit tube current is given for more carefully controlled and wider ranges of conditions. This is expressed in terms of the X-ray emission per milliampere.