X-ray microbeams based on Kumakhov polycapillary optics and its applications: Analytical consideration 26
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X-ray microbeams based on Kumakhov polycapillary optics and its applications: Analytical consideration 26

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Estimation of radiation flux density gain
on the output from a polycapillary column (diameter of the beam is 17 μm) is G =
Wout/Wdiaf ≈ 1.26 × 107/7.37 × 105 ≈ 17.1 at a distance from exit Lout = 1 mm (beam
diameter is 25 μm):
G = θcr( fin + L + fout)
rbeam

2
× Tr
= (4 × 10−3 × (0.5 + 10 + 1) × 10−3/(12.5 × 10−6))2 × 0.7
≈ 9.48. (11)