The excitation of extraordinary and ordinary waves in a magnetized plasma medium by a rotating electron beam

The possibility of the excitation of extraordinary and ordinary cyclotron waves by interaction of a rotating electron beam propagating parallel to the external magnetic field with a cold plasma medium is investigated. By obtaining the growth rates, the influence of dissipation on the development of extraordinary and ordinary cyclotron waves are studied. By comparing the development of the cyclotron instability with the dissipative instability in extraordinary and ordinary cyclotron waves excitation in the beam-plasma system, the dependency of the growth rates of these instabilities on the physical parameters is discussed. (c) 2006 American Institute of Physics.