ELECTRICAL PROPERTIES OF RADIO FREQUENCY GLOW DISCHARGES IN AIR AT ATMOSPHERIC PRESSURE
NAVAL WEAPONS LAB DAHLGREN VA
Pagination or Media Count:
Gas discharges maintained by radio frequency power were examined in the frequency range 1-25 Mcs. The discharges were maintained in air at atmospheric pressure between water cooled metal electrodes. The discharges were made symmetric by using two electrodes alike in shape and material. Important discharge quantities such as the voltage necessary to maintain the discharge, current density, and dissipated power were measured. The minimum instantaneous value of voltage necessary to maintain a discharge was found to be 270 volts. The current density is largely independent of current and has a value of 30 ampssq cm determined by using the peak discharge current. A minimum power of 4 watts is necessary to maintain a discharge. The influence of current amplitude, frequency, electrode distance, and other parameters on discharge voltage and current density was examined. Both voltage and current density were found to be essentially independent of frequency in the frequency range considered. Furthermore it was found that a number of properties of the type of discharge described in this report are analogous to the corresponding properties of dc glow discharges.
- Ammunition and Explosives
- Plasma Physics and Magnetohydrodynamics