Microwave probe based on resonance section of pair line

Described in the paper is the influence of gorge non-linear effects on the operation of a plasma resonance microwave probe based on the resonance section of a pair line, both theoretically and experimentally. It is shown that such a probe (in non-linear mode) can be used for measurement of plasma density, as well as plasma temperature. Resonance probes, used for plasma diagnostics are very sensitive even to minor changes in media parameters. Shifting and expanding of the resonance curve is the main data source in such sensors. The probe should introduce minimal perturbations into the surrounding plasma, though these perturbations can also be used for diagnostics. Described in this paper is a plasma resonance microwave probe based on the resonance section of a pair line. Even at a comparatively low exciting signal, non-linear effects appear. The authors have developed a non-linear theory of resonance microwave probes based on the resonance section of a pair line, and compared theoretical calculations with experimental results. It is shown that the non-linear mode can be used successfully for measurement of plasma density, as well as plasma temperature. The plasma density and temperature data, obtained by means of the microwave sensor under consideration, agrees well with the measurement results obtained using traditional single and double probes.