Study of surface flute modes propagation in a cylindrical metal waveguides with noncircular cross-section and plasma filling

Due to needs of modern radio-physics and plasma electronics, the dispersion properties of the plasma filled waveguides of different geometries have been actively studied. Such waveguides are used as the main component of oscillators and amplifiers of high frequency electromagnetic waves and guiders of intense charged particle beams. A theoretical study of surface flute modes (SFM) which can propagate along an azimuthal angular direction in a cylindrical metal waveguide with noncircular cross-section can be useful for elaboration of various radio engineering and plasma electron devices. That is why this paper is devoted to description of the SFM electromagnetic properties. They are studied analytically and numerically by using Maxwell's equations for a description of the SFM fields and cold plasma model with the aid of the successive approximation method.