Two methods for studying the conductivity of a plasma of a pulsed microwave discharge are compared: in a direct current and at the frequency of the field which creates the charge. The first of them is valid regardless of the length or form of the channel of the microwave discharge in a waveguide and is not limited by the size of the skin effect. According to the estimate, the concentration of electrons in the channel of the microwave discharge in the conditions of the experiment at atmospheric pressure is $10^{16}-10^{17}$ cm$^{-3}$.
Department of Electronics, Faculty of Physics, Moscow State University, Leninskie Gory, Moscow, 119992, Russia
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