SUPPRESSION OF TRANSITION RADIATION BY A MAGNETIC-FIELD

The role of the curvature of a relativistic particle trajectory in the generation of transition radiation in a randomly inhomogeneous medium is discussed. It is shown that the properties and nature of the radiation produced by a particle moving in a magnetic field along a curved trajectory differ strongly from those for rectilinear motion. Thus the radiation of high energy particles (gamma > omega-p/omega-B) is strongly suppressed. This leads to a significant decrease in the total emitted energy and to a weakening of the dependence of the intensity of the emitted radiation on the particle energy.