Development of Compound Refractive Lenses for x-rays

Beguiristain, H. R.; Piestrup, M. A.; Pantell, R. H.; Gary, C. K.; Cremer, J. T.; Tatchyn, R.
June 2000
AIP Conference Proceedings;2000, Vol. 521 Issue 1, p258
Academic Journal
One-dimensional and rotationally axisymmetric two-dimensional focusing of x-rays by plastic Compound Refractive Lens (CRL) systems are demonstrated and theoretical aspects behind the design of x-ray CRLs are presented in this report. X-rays between 8 and 19.5 keV were focused by cylindrical CRLs having focal lengths between 35 and 100 cm and fabricated using acrylic (Lucite) and polyethylene. Focusing of x-rays by a spherical CRL was also demonstrated observing a focal length of 85 cm and an effective aperture of about 320 μm for 8 keV x-rays. The gain, which is the increase in intensity in the image plane relative to the intensity that would have been obtained without a lens on that plane, was 1.5 for 8 keV photons. The gain of this spherical CRL scales about three orders of magnitude higher on undulator beam lines at third generation x-ray sources from the results obtained at the bending magnet x-ray source, with dimensions 445 μm in the vertical and 1700 μm in the horizontal, used in this work. © 2000 American Institute of Physics.


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