Diagnostic Capabilities of a Microwave Resonator Probe for Studies of the Parameters of a Nonstationary Magnetoplasma

We present the experimental results of developing the method for measurements of the parameters of a magnetoplasma using a microwave resonator probe based on a section of a two-wire line and aligned with an external magnetic field. It is found that the probe resonance is determined by the plasma refractive index for an extraordinary wave. The fact that the measuring system has two resonances at frequencies which are lower and higher than the eigenfrequency of the probe in free space makes it possible to measure the density of the nonstationary plasma in a wide range of values. The method of the third resonator harmonic is used as an independent method. The effect of disappearance of the probe resonance near the electron cyclotron frequency allows measuring the value of the external magnetic field with high accuracy. An increase in the amplitude of the high-frequency signal fed to the resonator leads to the appearance of ponderomotive nonlinearity that affects the probe data.