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Proceedings Paper

Spectral and polarization characteristics of relativistic electron radiation in crystals
Author(s): V. B. Ganenko; V. I. Truten; N. F. Shul'ga
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Paper Abstract

The motion of relativistic particles in crystals is complicated. At certain crystal orientations with respect to an electron beam, the motion of particles may become either regular (periodic) or chaotic. A regular type of electron motion results in interfering the emitted radiation due to periodical collisions of electrons with the atomic strings. In this case, sharp maxima appear in photon radiation spectra. Existence of periodical electron motion may result in high polarization of the radiation. For particles with an irregular type of the motion, periodicity of the atomic strings does not have any essential influence to radiation characteristics, and, hence, dynamic chaos phenomenon will take place. Subsequently, interference of radiation, due to electron scattering by single strings, disappears, and the radiation spectra have no sharp maxima; however, intensity of such radiation is significantly higher than radiation intensity in amorphous matter. The radiation spectra and polarization are very sensitive to the type of particle motion in a crystal, and depend on initial energy of particles. At electron energies of about a few hundred MeV the coherent effects of radiation in crystals are not sufficiently investigated. In this report the expected radiation characteristics (spectra and polarization) are presented for these electron energies, and possibilities of its experimental investigation at the SPARC facility (Frascati) are considered. Possibilities for experimental studying the dynamic chaos phenomena at electron motion in a crystal are discussed.

Paper Details

Date Published: 2 May 2007
PDF: 9 pages
Proc. SPIE 6634, International Conference on Charged and Neutral Particles Channeling Phenomena II, 66340R (2 May 2007); doi: 10.1117/12.741899
Show Author Affiliations
V. B. Ganenko, National Science Ctr. Kharkov Institute of Physics and Technology (Ukraine)
V. I. Truten, National Science Ctr. Kharkov Institute of Physics and Technology (Ukraine)
N. F. Shul'ga, National Science Ctr. Kharkov Institute of Physics and Technology (Ukraine)


Published in SPIE Proceedings Vol. 6634:
International Conference on Charged and Neutral Particles Channeling Phenomena II

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