X-ray microbeams based on Kumakhov polycapillary optics and its applications: Analytical consideration 22
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X-ray microbeams based on Kumakhov polycapillary optics and its applications: Analytical consideration 22

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Diameter of the beam on a column output is 25 μm − 2 (1mm× 4 mrad) = 17 μm. The radius of capture area of a polycapillary
is, therefore, equal to 17 μm/2 = 8.5 μm. Intensity of radiation, which would pass in a
diaphragm (Wdiaf) of the same size makes
Wdiaf = W0πr 2
diaf/(4π ( fin + L)2) =W0 rdiaf(2 ( fin + L))2
= 4.5 × 1012 × 8.5 × 10−62 × 0.5 × 10−3 + 10.0 × 10−32
≈ 7.372 × 105 photons/s. (9)