Amplification of Radiation by Relativistic Particles in a Strong Magnetic Field

Abstract

The possibility of maser action by relativistic charged particles confined to one-dimensional motion in a strong magnetic field is considered. It is shown that if the field lines are curved to form circular arcs, genuine maser action is impossible. Under more complex electrodynamical conditions when, for instance, points of inflection and torsion may be present in the field geometry or particle creation, electrostatic acceleration or plasma effects may be occurring, maser action is not impossible. Simple estimates suggest that this type of mechanism cannot be excluded from being responsible for the coherent radio emission from pulsars.

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