Elliptical wiggler beamline with minimum focal spot size at the ALS

Conference · Sun Dec 31 04:00:00 EST 1995

OSTI ID:220796

Martynov, V V ^[1]; McKinney, W R; Padmore, H A ^[1]

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1. Lawrence Berkeley Lab., CA (United States). Accelerator and Fusion Research Div.

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 2,000 eV. The rigorous theory of grating diffraction efficiency has been used to maximize throughput. This ia challenging optical problem due to the nature of the elliptical wiggler insertion device. The wiggler has a large source size din 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.

• DOE Contract Number: AC03-76SF00098
• OSTI ID: 220796
• Report Number(s): CONF-950793--; ISBN 0-8194-1875-7
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
ACCELERATOR FACILITIES
ADVANCED LIGHT SOURCE
BEAM PROFILES
DESIGN
DIFFRACTION GRATINGS
MONOCHROMATORS
POLARIZED BEAMS
WIGGLER MAGNETS