The features of synchrotron radiation from a relativistic particle rotating inside a spherical cavity

• DOI: 10.1016/j.nimb.2008.02.013
• Publication Date: 2008-02-21T12:25:50Z
• Authors: S.R. Arzumanyan; L.Sh. Grigoryan; H.F. Khachatryan; M.L. Grigoryan
• Keywords: 0103 physical sciences; 01 natural sciences

Abstract We have studied the radiation from a relativistic charged particle in a uniform rotation along the equatorial orbit inside a spherical cavity immersed in continuous loss-free dielectric, the permittivity of which in the frequency range under consideration is e > 1. A formula for calculation of radiation intensity at large distances from the cavity is derived. It is shown that with a special (resonant) choice of a non-dimensional parameter ξ the intensity of synchrotron radiation in the presence of a cavity may be either amplified or reduced almost by e times compared with particle rotation in empty space. The resonance value of ξ is determined by the number of harmonics and is independent of other parameters. A visual explanation of this phenomenon is given and its possible application is discussed.