Peculiarities of the formation of a filamentary structure of a microwave discharge in an argon flow

This paper presents the results of an experimental study spatial structure a microwave discharge maintained in argon flow by gyrotron radiation continuous mode with frequency 24 GHz at atmospheric pressure. In plasma plume, stationary filamentary channels are observed, elongated along direction flow, regardless orientation external electric field wave, surrounded diffusion halo. Measurements electron density, vibrational and rotational temperatures gas molecules filaments have been carried out. The role gas-dynamic mechanisms responsible for formation inhomogeneous static torch maintenance substantially nonequilibrium distribution temperature characteristics is discussed. Keywords: high-pressure discharge, torch, argon, filamentous channels, filaments.