Smith-Purcell radiation from periodic beams

D. Y. Sergeeva, A. P. Potylitsyn, A. A. Tishchenko, M. N. Strikhanov

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Smith-Purcell effect is well known as a source of monochromatic electromagnetic radiation. In this paper we present the generalized theory of Smith-Purcell radiation from periodic beams. The form-factors describing both coherent and incoherent regimes of radiation are calculated. The radiation characteristics are investigated in two practically important frequency ranges, THz and X-ray, for two modulation profiles, most frequently used in practice – a train of microbunches and a Gaussian-shaped one, characterized by sinusoidal modulation with an arbitrary modulation depth. On the base of the theory developed we show that a modulated electron beam consisting of a set of bunches makes it possible to improve significantly the spectral line monochromaticity of the light emitted, reaching values better than 1% for short gratings. We demonstrate as well that Smith-Purcell radiation can be used for non-destructive diagnostics of the depth of modulation for partially modulated beams. These findings not only open up a new way to manipulate the light emission using Smith-Purcell effect but also promise a profound impact for other radiation sources based on charged particle beams, such as undulator radiation in FELs, next-generation X-ray radiation source based on inverse Compton scattering, in a wide range from THz to X-rays.

Original languageEnglish
Pages (from-to)26310-26328
Number of pages19
JournalOptics Express
Volume25
Issue number21
DOIs
Publication statusPublished - 16 Oct 2017

    Fingerprint

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Sergeeva, D. Y., Potylitsyn, A. P., Tishchenko, A. A., & Strikhanov, M. N. (2017). Smith-Purcell radiation from periodic beams. Optics Express, 25(21), 26310-26328. https://doi.org/10.1364/OE.25.026310