How does photoionization make air electrically conductive?
• Photoionization is the process by which particles or wave-packets of electromagnetic energy called photons, in this case ultraviolet photons, bombard and dislodge electrons from the molecules of oxygen they strike. The electrons are then free to move as a current whenever they are subjected to an electrical potential. (A flow of electrons is an electrical current.) • Why do you ionize the oxygen in air instead of the more common nitrogen? • Nitrogen is four times more common in air than oxygen, but is difficult to photoionize. Oxygen is easily ionized by photon bombardment, especially by far-ultraviolet radiation. For example, at a wavelength of 193 nanometers (nm) only two simultaneous photons are needed to dislodge an electron from a molecule of molecular oxygen (O2). By using 193 nm ultraviolet radiation we are able to create a channel of ionized, and therefore electrically conductive, air up to 100 meters (yards) long. For more details, please click on US Patent #5,675,103 • Infr
