Abstract
AbstractThe energy and momentum balance equations for a potential wave in a monoenergetic electron beam‐plasma system are considered in the linear approximation, when the wave is in Čerenkov resonance with the beam particles. An energetic analysis of certain types of beam‐plasma instabilities is given. It is shown that the energy and momentum balance equations are consistent with the dispersion relation for all unstable waves. From this fact follows that the energy and momentum densities of all linear unstable waves in reactive beam‐plasma systems are equal to zero. An interpretation and a possible classification of beam‐plasma instabilities are given.
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