Focusing Hard X Rays to Nanometer Dimensions by Adiabatically Focusing Lenses

Details Focusing Hard X Rays to Nanometer Dimensions by Adiabatically Focusing Lenses Focusing Hard X Rays to Nanometer Dimensions by Adiabatically Focusing Lenses

Feb 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005phrvl..94e4802s&link_type=abstract

Physical Review Letters, vol. 94, Issue 5, id. 054802

Physics

Optics

45

X-Ray Beams And X-Ray Optics, Synchrotron Radiation Instrumentation

Scientific paper

We address the question of what is the smallest spot size that hard x rays can be focused to using refractive optics. A thick refractive x-ray lens is considered, whose aperture is gradually (adiabatically) adapted to the size of the beam as it converges to the focus. These adiabatically focusing lenses are shown to have a relatively large numerical aperture, focusing hard x rays down to a lateral size of 2 nm (FWHM), well below the theoretical limit for focusing with waveguides [C. Bergemannet al., Phys. Rev. Lett.912003204801].

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