Design and fabrication of an x-ray lens assembly for focusing x-ray beams is described. The assembly consists of a number of precisely stacked and aligned aluminum parts. These parts are cut from a long extruded section having sixteen parabolic cavities along its length. The thickness of the wall between adjacent cavities is 0.2 mm. By cutting the assembled parts diagonally as shown below, a variable-focus lens system can be made. Moving the lens horizontally allows the incident beam to pass through fewer or more cavities, collimating or focusing the emerging beam at a desired distance downstream. The variable focus aluminum ...
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Argonne National Lab., IL (United States)
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Illinois
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Description
Design and fabrication of an x-ray lens assembly for focusing x-ray beams is described. The assembly consists of a number of precisely stacked and aligned aluminum parts. These parts are cut from a long extruded section having sixteen parabolic cavities along its length. The thickness of the wall between adjacent cavities is 0.2 mm. By cutting the assembled parts diagonally as shown below, a variable-focus lens system can be made. Moving the lens horizontally allows the incident beam to pass through fewer or more cavities, collimating or focusing the emerging beam at a desired distance downstream. The variable focus aluminum lens has been used at the Advanced Photon Source to collimate a monochromatic, 81 keV undulator beam to increase downstream crystal monochromator throughput. Results indicate collimation consistent with theoretical expectations.
Khounsary, A.; Shastri, S. D. & Macrander, A.A variable-focus x-ray compound lens.,
article,
October 29, 2002;
Illinois.
(digital.library.unt.edu/ark:/67531/metadc734443/:
accessed September 23, 2017),
University of North Texas Libraries, Digital Library, digital.library.unt.edu;
crediting UNT Libraries Government Documents Department.