Coherent X-radiation of relativistic electrons in a single crystal under asymmetric reflection conditions

Coherent X-ray radiation from a relativistic electron in a combined medium

“…In this approach, in con trast to the dynamic one, the interaction o f an atom with the wave field produced in the crystal by the com bined scattering by all other atoms is neglected, i.e., the multiwave scattering, in particular, the interaction of elementary waves with the refracted one and the reflections of waves between the atomic planes are dis regarded. The coherent X-ray radiation of relativistic electrons in a crystal was developed within the dynamic diffraction theory in [20][21][22][23][24][25]. It should be noted that the coherent X-ray radiation is considered in [20][21][22] in the special case of symmetric reflection where the reflecting system o f atomic planes in the crystal is parallel and perpendicular to the target sur face for the Bragg and Laue scattering geometries, respectively.…”

“…It should be noted that the coherent X-ray radiation is considered in [20][21][22] in the special case of symmetric reflection where the reflecting system o f atomic planes in the crystal is parallel and perpendicular to the target sur face for the Bragg and Laue scattering geometries, respectively. The dynamic theory o f coherent X-ray radiation from relativistic electrons in a crystal was developed in [23][24][25] in the general case o f asymmet ric electron field reflection relative to the target surface where the system o f parallel reflecting target layers can be oriented at an arbitrary angle to the target surface.…”

Diffracted transition radiation of a relativistic electron in a three-layer structure

“…The theory o f coherent X-ray radiation o f relativ istic electrons in a crystal, which describes the contri butions from the DTR and PXR mechanisms using the two-wave approximation o f the dynamic theory o f dif fraction ofX-ray waves, was developed in [18][19][20][21][22]. In [18,19], coherent X-ray radiation was considered in a special case o f symmetric reflection, when the reflect ing system o f atomic planes of the crystal is parallel to the surface of the target (in the case of Bragg scattering geometry) or is perpendicular to it (in the Laue scat tering geometry).…”

“…In [20][21][22], a dynamic theory of coherent X-ray radiation o f relativistic electrons in a crystal is devel oped for the general case of asymmetric reflection of the electron field relative to the target surface, when the system of parallel reflecting layers in the target can form an arbitrary angle with the target surface. It is shown that by changing the asymmetry o f the reflec tion of the electron field (i.e., by changing the angle between the target surface and the system of diffracting atomic planes o f the crystal), it is possible to substan tially increase the spectral-angular density of DTR and PXR.…”

Manifestation of the effects of dynamic diffraction in the coherent X-ray radiation of relativistic electrons in a periodic layered medium

“…The effects of dynamic diffraction are well known in the physics of the scattering of free X rays in crystals [26], and their manifestation in the coherent radiation of rel ativistic electrons in crystals was studied in [27][28][29][30][31].…”