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Bifocal miniature toroidal shaped X-ray mirrors

Published online by Cambridge University Press:  29 February 2012

Sterling Cornaby ,
Detlef-M. Smilgies  and
Donald H. Bilderback
Sterling Cornaby*
Affiliation:
Cornell High Energy Synchrotron Source (CHESS), Ithaca, New York 14853 School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853
Detlef-M. Smilgies
Affiliation:
School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853
Donald H. Bilderback
Affiliation:
Cornell High Energy Synchrotron Source (CHESS), Ithaca, New York 14853 School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853
*
a)Author to whom correspondence should be addressed. Electronic mail: scornaby@moxtek.com
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Abstract

We have fabricated a bifocal miniature toroidal mirror that horizontally and vertically focuses to two different locations to provide a smaller footprint of the beam for grazing-incidence wide-angle scattering (GIWAXS), while at the same time focusing the beam in the horizontal direction on the detector to further enhance the angular resolution. At CHESS we traditionally use glass single-bounce monocapillary optics for a wide range of X-ray experiments to get a fine X-ray beam of 5 to 20 μm. This miniature toroidal mirror was prepared by designing and fabricating an X-ray focusing capillary in which the sagittal and meridional focusing is decoupled and only a quadrant of the accepted annulus is used for focusing the beam. The mirror produced a 120 μm horizontal by 25 μm vertical focus at 50 mm from the tip of the optic and a 44 μm horizontal by 70 μm vertical focus at 150 mm from the tip of the optic.

Keywords

bifocal miniature toroidal mirrorgrazing-incidence wide-angle X-ray scatteringX-ray microfocused beam
Type
Technical Articles
Information
Powder Diffraction , Volume 25 , Issue 2 , June 2010 , pp. 154 - 156
Copyright
Copyright © Cambridge University Press 2010

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