Coolidge tube

Using a block of tungsten as an anode in a cathode-ray tube, Coolidge was able to produce X rays. This made it easier and more efficient to produce X rays, enabling their use in industry, medicine, and dentistry.
 William David Coolidge United States 1913 Coolidge tube

Using a block of tungsten as an anode in a cathode-ray tube, Coolidge was able to produce X rays. This made it easier and more efficient to produce X rays, enabling their use in industry, medicine, and dentistry.