STEPS IN THE PROCESS OF X-RAY PRODUCTION
When the unit is turned on, the filament of the cathode is heated to
incandescence (a white-hot glow), causing it to emit electrons. When high voltage is
applied, these electrons are drawn across the opening and collide with the focal spot of
the anode target resulting in the production of x-rays or photons. See figures 1-3, 1-4,
and 1-5 for a diagram of the complete procedure.
Figure 1-3. Tube head with the filament of the cathode emitting electrons.