Effective source of sharp focused electromagnetic radiation of electrons with moderate relativistic energy

The new circulation scheme of intense bremsstrahlung source with a sharp directed flow of X-ray and gamma-photons is proposed. In traditional sources the summary output, due to notable self-absorption of generated photon in target, makes no more than 1/3 from all radiative electron losses. Besides because of strong electron scattering in the target material, the photon radiation happens in an angle, which is much more than an inverse electron relativistic factor. In a circulating source the thin target placed in a magnetic field is used, and electrons are radiating, multiple crossing the target. Thereof all flow of generated photons is kept, and the total radiation output essentially raises. The new configuration of magnetic fields improving the electron focusing and simultaneously reducing angular divergence of radiation is considered. Moreover the scheme permits to produce here a lateral drift that displaces circulating particles and to "clean" a target space. Computer modeling with using of the software package GEANT confirms high efficiency of proposed scheme. So the yield of hard photons in 5-degrees cone rises at order in comparison with traditional devices. Accordingly, the portion of widely dispersed radiation is reduced.