Abstract
The fact that the tube current of a transformer X-ray apparatus draws almost a trapezoid and runs even below the low tube voltage under which effective X-rays can radiate, places a useless load on a focus and increases the useless surface dose. The author investigated a method of sending a tube current of only the approximate value of maximum alternating voltage, with a supersaturated reactor that causes plusation which syncronizes with the tube voltage wave to the control circuit of the grid bias of a triode X-ray tube. Moreover, he used this method with a condenser discharge X-ray apparatus and obtained good results reported here.
