Divergence behavior due to surface channeling in capillary optics

Recent studies on the transmitting and focusing properties of capillary optical systems have shown that several unexpected effects take place during the experiments. One such effect is a decrease in the beam divergence behind the capillary structures. In this letter, we present results on x-ray scattering at grazing angles inside capillaries. During x-ray propagation in capillary channels, there is a strong angular redistribution of the beam, which has been explained in the framework of the wave scattering theory. © 2001 American Institute of Physics.