polycapillary optics

polycapillary optics

[‚Päl·‚kap·ə‚ler·ē ′äp·tiks]
(optics)
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Key words: instrumental effects; parallel beam geometry; polycapillary optics; residual stress analysis; texture analysis; x-ray diffraction; x-ray optics.
Polycapillary optics act as x-ray guides to funnel the rays from the point focus of a tube to the surface of the specimen; funneling is achieved by multiple total reflection of the rays on the inner walls of hollow glass fibers.
These plans are designed to increase the count rate of the beta unit and include modifications to the geometry, i.e., the collimator and solid angle, testing of the polycapillary optics and alignment issues, and larger-area x-ray absorbers.