Grazing incidence parametric X-ray emission

Diffracted transient radiation of a relativistic electron in a bilayer target

“…If, how ever, the density of the amorphous medium is reduced substantially, the contribution to the total DTR of the transition radiation wave excited at the second inter face may become predominant. All these conclusions can be drawn from analysis of expressions (22). It should be noted that thickness a of amorphous medium in the case of a thin nonabsorbing target affects, in accordance with relations (22), only the…”

“…In contrast to the dynamic approach, in this approach the interaction of an atom with the wave field pro duced in the crystal by simultaneous scattering of waves from all other atoms is disregarded (i.e., multi wave scattering is not taken into account). The description of coherent X ray emission by relativistic electrons in crystals and periodically layered media was proposed in [20][21][22][23][24][25][26][27][28][29] on the basis of the dynamic theory of diffraction of X ray waves. In [20][21][22], coherent X rays are considered in the special case of symmetric reflection, when the reflecting system of atomic planes of the crystal is parallel to the target sur face (in the case of Bragg scattering geometry) or per pendicularly to it (in the case of the Laue scattering geometry).…”

“…The description of coherent X ray emission by relativistic electrons in crystals and periodically layered media was proposed in [20][21][22][23][24][25][26][27][28][29] on the basis of the dynamic theory of diffraction of X ray waves. In [20][21][22], coherent X rays are considered in the special case of symmetric reflection, when the reflecting system of atomic planes of the crystal is parallel to the target sur face (in the case of Bragg scattering geometry) or per pendicularly to it (in the case of the Laue scattering geometry). In [23][24][25][26][27][28][29], the dynamic theory of coher ent X rays emitted by relativistic electrons in crystals and periodic layered media is developed for the general case of asymmetric reflection of the electron field rel ative to the target surface, when atomic planes or reflecting layers of the target form a certain arbitrary angle with the target surface.…”

X-ray generation from thin targets mounted inside a compact betatron

“…Our general tack has been to look for x-ray reflectors with the best reflectivities, the assumption being that they will also be the best reflectors of the virtual photon field associated with electrons passing though them and, hence, the best radiators of x-rays [7][8]. Man-made x-ray mirrors with high x-ray reflectivities exist and have been fabricated for years and used extensively in x-ray science and technology [15].…”

“…The positions of the spectral peaks of PXR emitted from a crystal and multilayer into the detector can be described by the following expression obtained for the n-order PXR peaks [8][9]: …”