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

Vladimir V. Martynov; Wayne R. McKinney; Howard A. Padmore

doi:10.1117/12.221677

25 September 1995 Elliptical wiggler beam line with minimum focal spot size at the ALS

Vladimir V. Martynov, Wayne R. McKinney, Howard A. Padmore

Proceedings Volume 2516, X-Ray Microbeam Technology and Applications; (1995) https://doi.org/10.1117/12.221677
Event: SPIE's 1995 International Symposium on Optical Science, Engineering, and Instrumentation, 1995, San Diego, CA, United States

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.

Citation Download Citation

Vladimir V. Martynov, Wayne R. McKinney, and Howard A. Padmore "Elliptical wiggler beam line with minimum focal spot size at the ALS", Proc. SPIE 2516, X-Ray Microbeam Technology and Applications, (25 September 1995); https://doi.org/10.1117/12.221677

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