cathode glow
3.In 1895, Wilhelm Roentgen accidentally discovered that a cathode-ray tube could make a sheet of paper coated with barium platinocyanide glow, even when the tube and the paper were in separate rooms.
4.The carburized layer with special physical and chemical properties was prepared on the surface of titanium alloy Ti6Al4V making use of double glow discharge plasma carburizing technique and hollow cathode effect, with a netlike highly pure graphite as the source cathode, titanium alloy as the cathode, and Ar as the working gas.
