Coherent X-ray Fluorescent Excitation inside MCP Microchannels: Axial Channeling and Wave Propagation

We have experimentally and theoretically characterised silicon-glass Micro-Channel Plate (MCP) devices doped with cobalt atoms. Under anomalous scattering condition near the SiL-edges and CoK-edge we have proved the coherent excitation and the axial propagation of the induced fluorescence radiation inside micro-channels. Chemical modification of the MCP inner surface shows the efficient transmission of hard X-ray secondary radiation at the primary radiation energies of similar to 100 eV and similar to 8 keV. Experimental tests for these X-ray waveguides have been performed utilising both synchrotron radiation and conventional X-ray sources. X-ray pattern simulations point out that the propagating radiation has a waveguide modal character, which is described as axial channeling of the secondary fluorescence radiation.