ISSN:
1089-7623
Source:
AIP Digital Archive
Topics:
Physics
,
Electrical Engineering, Measurement and Control Technology
Notes:
A water-cooled double-crystal monochromator for x-ray absorption spectroscopy is described. It has a wide aperture (3 mrad) and is attached to a linear slide through a twin axis goniometer to a large Huber rotary table for accurate alignment of the crystal planes to the incident beam. The center of rotation of the goniometers has been chosen as the geometric center at the surface of the first crystal. The linear slide adjusts the monochromator vertically so that the axis of rotation intercepts the synchrotron radiation. The two goniometers provide the monochromator with a transverse and longitudinal tilt with respect to the x-ray beam. Water cooling is incorporated in the first crystal to dissipate the expected heat loading of 120 W from the SRS wiggler. The second crystal is supported by three Inchworms which control the yaw and tilt. Then adjustments are required to optimize spectral purity across the beam alignment and harmonic rejection, respectively, with respect to the first crystal. The performance of the monochromator is discussed.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.1140849
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