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Gain and Features of Radiation of Positrons in a Crystalline Undulator with Sections

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Journal of Contemporary Physics (Armenian Academy of Sciences) Aims and scope

Abstract

The undulator radiation of positrons channeled in a crystalline undulator with sections (CUS) is investigated theoretically taking into account the effect of dielectric polarization of the crystalline medium. The configuration of CUS preserves planar channeling of positrons with a given energy. An analytical expression is obtained for the spectral distribution of the number of radiated photons. The features of this spectrum are presented. As expected, such a modification of the crystalline undulator results in the gain of radiation owing to the constructive interference of the radiation fields formed in separate sections. The optimal parameters of the CUS are found. Such micro-emitters will find wide practical applications because they generate directional beams of both hard and soft photons.

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Correspondence to H. L. Gevorgyan.

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Translated by V. Musakhanyan

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Gevorgyan, H.L., Gevorgian, L.A. & Shamamian, A.H. Gain and Features of Radiation of Positrons in a Crystalline Undulator with Sections. J. Contemp. Phys. 56, 159–168 (2021). https://doi.org/10.3103/S1068337221030117

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  • DOI: https://doi.org/10.3103/S1068337221030117

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