Abstract
A study is made of the excitation of waves in the whistler frequency range by a given ring electric current in a collisional magnetoplasma in the presence of a cylindrical duct with enhanced density. It is shown that, under certain conditions, dissipative losses due to electron collisions in plasma can lead to a substantial redistribution of the source radiation power over the spatial spectrum of the modes guided by the duct, as compared to the case of a collisionless plasma. Numerical results are presented that illustrate these changes in the excitation efficiency of whistler modes.
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