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Multi-Capillary and Conic Optical Elements for Parallel Beam Production

Published online by Cambridge University Press:  06 March 2019

C. M. Dozier ,
D. A. Newman ,
M. I. Bell ,
Qi-Fan Xiao  and
S. L. Espy
C. M. Dozier
Affiliation:
Naval Research Laboratory, Washington, DC 20375
D. A. Newman
Affiliation:
SFA, Inc., Landover, MD 20785
M. I. Bell
Affiliation:
Naval Research Laboratory, Washington, DC 20375
Qi-Fan Xiao
Affiliation:
X-Ray Optical Systems, Inc., Albany, NY 12205
S. L. Espy
Affiliation:
Physitron, Inc., Huntsville, AL 35805
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Extract

Large area, parallel beams of x-rays are potentially useful in many diffraction, imaging and other x-ray analysis applications. Diffraction, in typical experiments, uses only a small portion of the incident beam that is within a limited “rocking curve” of the crystal capable of diffracting, although the whole crystal may be illuminated by the incident beam. Signal intensity can be increased if the ”whole” crystal can be made to diffract simultaneously. Similarly for imaging, improved results also are possible if divergent beams are replaced with nearly parallel ones. Production of parallel beams of large areal extent has not been simple. Often this meant that the source had to be placed at great distances from the sample, reducing the incident intensity. Sometimes, asymmetric cuts of crystals can be used to increase beam cross-sectional areas.

Production of parallel beams of large area! extent has not been simple. Often this meant that the source had to be placed at great distances from the sample, reducing the incident intensity. Sometimes, asymmetric cuts of crystals can be used to increase beam cross-sectional areas.

Type
Research Article
Information
Advances in X-Ray Analysis , Volume 39: Forty-Fourth Annual Conference on Applications of X-ray Analysis, July 31 - August 4, 1995 , 1995 , pp. 73 - 79
Copyright
Copyright © International Centre for Diffraction Data 1995

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