Resonant diffraction radiation from ultrarelativistic particle moving close to a tilted grating

A simple model for calculation of diffraction radiation characteristics when ultrarelativistic charged particle moves close to a tilted ideally conducting strip has been developed. Resonant diffraction radiation (RDR) is considered as superposition of radiation fields for periodically positioned strips. RDR characteristics have been calculated in dependence on the number of grating elements, tilted angle, and initial particle energy. There has been noticed an analogy with both resonant transition radiation in absorbing medium and parametric X-ray radiation. Introduction In papers [1-4] characteristics of electromagnetic radiation from in parallel passing relativistic particle above diffraction grating (so-called Smith-Purcell effect (SPE)) have been considered. The interest to similar kind of radiation is associated, firstly, with possibility of SPE using for generation of intensive radiation in millimeter and submillimeter region [5] and,secondly, with ∗e-mail: [email protected]