The possibility of determining electron concentration n from the radial distribution of the amplitudes of the field components $Е_{r}(r), E_{z}(r), H_\phi(r)$ of а surface electromagnetic wave in а surfatron is examined. U se is made of а plasma waveguide model taking into account tube walls. Of three types of electromagnetic probes, the one recording $Е_{r}(r)$ gives the best results. Nonlinear effects caused bу the influence of probes on the discharge are observed at small probe-tube distances.
Department of Physical Electronics
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