Ion-ion Hybrid Resonance Research Articles

Energy Transfer to Ions from an Unneutralized Electron Beam

Simulation studies of the response of an inhomogeneous plasma to an unneutralized electron beam have led to an analytic theory of the energy transfer from the beam to ambient ions. Energy is transferred to the plasma by the ion-hybrid resonance and is retained because of phase-mixing.

Experimental Investigation of the Ion-Ion Hybrid Resonance

An experiment is described in which the ion-ion hybrid resonance is observed and studied. The theory of a cool, partially ionized plasma in a magnetic field is given, and dispersion characteristics of a wave launched in a bounded two-ion species plasma near the resonance are investigated. Computer results showing the behavior of the attenuation coefficient of the launched wave as a function of density, magnetic field, resistivity, density ratio of the ions, and frequency are given. The apparatus for generating a highly ionized pulsed plasma and for launching and detecting a wave in the plasma is described. The attenuation coefficient has been measured for a variety of plasma conditions; this data has been fitted to the predicted theory with generally good agreement using values of plasma density and temperature which are characteristic of the type of discharge used.