Spectral and polarization characteristics of relativistic electron radiation in crystals

V. B. Ganenko; V. I. Truten; N. F. Shul'ga

doi:10.1117/12.741899

2 May 2007 Spectral and polarization characteristics of relativistic electron radiation in crystals

V. B. Ganenko, V. I. Truten, N. F. Shul'ga

Proceedings Volume 6634, International Conference on Charged and Neutral Particles Channeling Phenomena II; 66340R (2007) https://doi.org/10.1117/12.741899
Event: International Conference on Charged and Neutral Particles Channeling Phenomena II, 2006, Rome, Italy

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.

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V. B. Ganenko, V. I. Truten, and N. F. Shul'ga "Spectral and polarization characteristics of relativistic electron radiation in crystals", Proc. SPIE 6634, International Conference on Charged and Neutral Particles Channeling Phenomena II, 66340R (2 May 2007); https://doi.org/10.1117/12.741899

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KEYWORDS

Crystals

Polarization

Particles

Laser crystals

Radiation effects

Diamond

Chaos

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