Angular distribution of X-ray radiation by 500 MeV electrons in a tungsten crystal

Adischev, Y.N.; Arishev, S.N.; Vnukov, A.V.; Vukolov, A. V.; Потылицын, А. П.; Кузнецов, С. И.; Zabaev, V. N.; Kalinin, B. N.; Kaplin, V. V.; Uglov, S. R.; Kubankin, A. S.; Nasonov, N. N.

doi:10.1016/s0168-583x(02)01310-1

Cited by 25 publications

(13 citation statements)

References 7 publications

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“…In a crystalline solid a small part of these waves experiences diffraction on crystallographic planes forming a radiation burst (which is usually called reflex) in the vicinity of the Bragg direction (the one specular to the particle velocity with respect to the planes). Such diffracted transition radiation (DTR) has been deeply studied theoretically (see, e.g., [1][2][3][4]) and observed experimentally [5]. It is shown that DTR is highly monochromatic, having frequency, which naturally equals the Bragg one, depending on the observation angle and the parameters of the crystalline lattice.…”

Section: Introductionmentioning

confidence: 99%

Diffracted x-ray transition radiation by a “half-bare” electron

Trofymenko

Шульга

Shchagin

2019

Phys. Rev. Accel. Beams

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The process of diffracted x-ray transition radiation by a high-energy "half-bare" electron in a crystalline target is considered in Bragg geometry. The electron is supposed to appear in the mentioned state, in which the field around it is significantly suppressed comparing to the equilibrium Coulomb one, in the result of preliminary penetration through an upstream amorphous target situated on some distance from the crystal. It is shown that the process of the electron's field regeneration after its exit from the upstream target dramatically modifies both the diffracted transition radiation angular distribution and its total yield making them dependent on the distance between the targets. Analytical expressions for these quantities, as well as their simple approximations, are derived. Almost arbitrary crystal orientation is considered. Special attention is drawn to the case of backward radiation geometry when the emitted radiation has to penetrate through the upstream target on its way to the detector.

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Section: Introductionmentioning

confidence: 99%

Diffracted x-ray transition radiation by a “half-bare” electron

Trofymenko

Шульга

Shchagin

2019

Phys. Rev. Accel. Beams

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“…At the same time, the Coulomb field of the charged particle crossing the crystalline plate is scattered by a system of parallel atomic crystal planes, thus generating parametric X ray radiation (PXR) [5][6][7]. These radiation mecha nisms in the two wave approximation of dynamic dif fraction theory were considered in [8][9][10][11] in the case of the symmetric reflection scheme in which the sys tem of diffracting atomic crystal planes was perpendic ular (in the case of Laue scattering geometry) and par allel (in the case of Bragg scattering) to the surface of a crystal plate. In the general case of asymmetric radi ation reflection from a plate in which the diffracted atomic planes form an arbitrary angle with the plate surface, dynamic effects in PXR and DTR were con sidered in [12][13][14][15], where it was shown that the radia tion yields can be significantly increased by varying the reflection symmetry.…”

Section: Introductionmentioning

confidence: 99%

Diffracted transition radiation of relativistic electrons in an artificial periodic structure

Blazhevich

Kolosova

Носков

2012

J. Synch. Investig.

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A theory concerning the coherent X ray radiation of relativistic electrons crossing an artificial periodic medium in Laue scattering geometry has been constructed. Expressions describing the spectral angular characteristics of radiation in the Bragg scattering direction have been obtained and studied. Radia tion is considered in analogy with that in the crystal medium as a result of the coherent summation of the con tributions of two radiation mechanisms, in particular, parametric X ray radiation (PXR) and diffracted tran sition radiation (DTR). It is shown that the DTR yield from a layered target can exceed the particle radiation yield in a single crystal radiator by one order or more under similar conditions.

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“…Dynamic effects in PXR were reported in [5][6][7][8] in a geometry of symmetric reflection, where PXR is generally formed due to the main branch of the solution to the dispersion equation for x-rays in a crystal. In the Bragg scattering geometry in the case of symmetric reflection, the surface of the crystal target is parallel to the diffracting crystal surfaces (δ = 0).…”

Section: Introductionmentioning

confidence: 99%