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

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• 作者：S.R. Arzumanyan ; L.Sh. Grigoryan ; H.F. Khachatryan ; M.L. Grigoryan
• 关键词：Synchrotron radiation ; Relativistic electron
• 刊名：Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
• 出版年：2008
• 出版时间：September 2008
• 年：2008
• 卷：266
• 期：17
• 页码：3715-3720
• 全文大小：311 K

文摘

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 ε > 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 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.