Focusing hard x-ray FEL beams with parabolic refractive lenses

Parabolic refractive x-ray lenses are high quality imaging optics for hard x-rays. They are well suited for full field and scanning microscopy with hard x-rays. They are robust and can withstand the heat load of the white beam of an ESRF undulator source. The microbeam properties expected for focusing the XFEL beam with refractive lenses are estimated. The stability of the optic in the X-FEL beam is considered. Beryllium parabolic refractive lenses have been installed at the SPPS at SLAC. First results of the commissioning of these optics are reported.

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