Polarization of photons emitted in the process of resonant coherent excitation of relativistic ions under planar channeling conditions

X-ray surface waves generated by the resonant coherent excitation of relativistic ions in crystals

“…4. The calculations [3] indicate that the angular azimuthal distribution of ion radiation I 0 (ϕ) on the cone must be anisotropic. According to esti mated values based on these calculations, the ion radi ation intensity I 0 (ϕ) varies by several percent when azimuthal angle scanning is within a few degrees of the reflection surface.…”

“…The second peak intensity is approximately half as high again as the specular reflection peak intensity. In [3], the angular distribution of photons has been calculated in the laboratory reference frame under the experimental conditions in [2]. The target thickness was 21 μm.…”

“…In the experiment described in [2], under the RCE of helium like Fe 24+ ions moving over the planar channel of a silicon crystal, high anisotropy of the CXR yield was observed. In this case, the authors of [3] have calculated the angular distributions for the X rays of ions subjected to RCE. The results also indicate high anisotropy of the CXR yield and wide variations in the degree of polarization, which are caused by the anisotropic behavior of the crystal's electromagnetic field acting on a moving ion.…”

“…In [3], when the angular distribution of the photon yield is analyzed under the experimental conditions in [2] and the degree of linear photon polarization is esti mated in the laboratory reference frame, the X raycrystal interaction is ignored. Up to now, the speci ficity of the CXR yield from a crystal has not been fully examined under RCE conditions with allow ance for the aforementioned interaction.…”