Axial Structure of Gas Discharge Sustained by the Quadrupolar Wave in Three Component Magnetized Waveguide Structure

The report presents the results of theoretical research of plasma density axial structure in gas discharge sustained by the travelling slightly–damping nonpotential quadrupolar surface wave (SW) with azimuthal wave number ±= in diffusion controlled discharge regime. SW propagates in three components waveguide structure that consists of a cylindrical magnetized plasma column with radius and waveguide metal wall with radius >. There is a vacuum gap between the plasma column and the metal wall. External constant magnetic field is directed along the axis of the waveguide system. The quadrupolar mode was considered due to the fact that this wave is useful for gas discharge sustaining [1]. Plasma density axial distribution along the discharge was studied in the framework of the electrodynamic approach [2]. Such description has shown its efficiency for theoretical modeling of the long discharges sustained by the symmetric ( = ) and dipolar modes ( ±= ) (see review paper [3]). The dispersion properties of quadrupolar waves and plasma density axial structure in simplified plasma–vacuum discharge structure were considered i