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Proceedings Paper

Elliptical wiggler beam line with minimum focal spot size at the ALS
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Paper Abstract

A beamline for circularly polarized radiation produced by an elliptical wiggler has been designed at the ALS. It covers a broad energy range from 50 eV to 2000 eV. The rigorous theory of grating diffraction efficiency has been used to maximize throughput. This is a challenging optical problem due to the nature of the elliptical wiggler insertion device. The wiggler has a large source size in the vertical and horizontal directions, and the monochromator requires high resolution (small slits), a wide tuning range, and cooling for high heat loads. These problems have been solved by using a variable included angle monochromator with high demagnification onto the entrance slit, aberration correction of the grating for the large vertical aperture, and cooled optics.

Paper Details

Date Published: 25 September 1995
PDF: 12 pages
Proc. SPIE 2516, X-Ray Microbeam Technology and Applications, (25 September 1995); doi: 10.1117/12.221677
Show Author Affiliations
Vladimir V. Martynov, Lawrence Berkeley National Lab. (USA) and Institute of Microelectronics Technology (Russia)
Wayne R. McKinney, Lawrence Berkeley National Lab. (United States)
Howard A. Padmore, Lawrence Berkeley National Lab. (United States)

Published in SPIE Proceedings Vol. 2516:
X-Ray Microbeam Technology and Applications
Wenbing Yun, Editor(s)

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