Large aperture compound lenses made of lithium

J. T. Cremer, M. A. Piestrup, H. R. Beguiristain, C. K. Gary, R. H. Pantell
2003 Review of Scientific Instruments  
We have measured the intensity profile and transmission of x rays focused by a series of biconcave parabolic unit lenses fabricated in lithium. For specified focal length and photon energy lithium compound refractive lenses ͑CRL͒ have a larger transmission, aperture size, and gain compared to aluminum, kapton, and beryllium CRLs. The lithium compound refractive lens was composed of 335 biconcave, parabolic unit lenses each with an on-axis radius of curvature of 0.95 mm. Two-dimensional focusing
more » ... imensional focusing was obtained at 8.0 keV with a focal length of 95 cm. The effective aperture of the CRL was measured to be 1030 m with on-axis ͑peak͒ transmissions of 27% and an on-axis intensity gain of 18.9.
doi:10.1063/1.1556948 fatcat:4ntyncusmbc6rhousqvttyq364