X-ray microbeams based on Kumakhov polycapillary optics and its applications: Analytical consideration 8
Application of polycapillary optics to conventional low-power X-ray tubes allows receiving
X-ray microbeams with high density of a flux. So, a microfocus semilens with
focal length of millimetre order allows to receive X-ray microbeam with the divergence
of about critical angle for TER and the density of the order of 1010 photon/s (mm2) for
monochromatic characteristic radiation [4,5]. The area of cross-section of the resulting
beams is defined by the exit diameter of a semilens that finally provides focal spot size of
the order of millimetre.