Electron Cyclotron Absorption of Microwaves with Small Propagation Angle in Dense Plasmas
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We derive an approximate dispersion equation for slow waves with frequency near electron cyclotron frequency, propagating quasi-longitudinally in plasmas. This equation is studied both numerically and within the framework of perturbation theory. The obtained cyclotron-absorption coefficients do not have singularities in the limiting case of strictly longitudinal propagation and ensure correct transition to well-known expressions for the case of large propagation angles.
KeywordsMicrowave Perturbation Theory Quantum Electronics Nonlinear Optic Slow Wave
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