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Synchrotron and Laboratory Studies Utilizing a New Powder Diffraction Technique

Published online by Cambridge University Press:  06 March 2019

G. S. Knapp ,
M. A. Beno ,
G. Jennings ,
M. Engbretson  and
M. Ramanathan
G. S. Knapp
Affiliation:
Argonne National Laboratory, Argonne IL 60439
M. A. Beno
Affiliation:
Argonne National Laboratory, Argonne IL 60439
G. Jennings
Affiliation:
Argonne National Laboratory, Argonne IL 60439
M. Engbretson
Affiliation:
Argonne National Laboratory, Argonne IL 60439
M. Ramanathan
Affiliation:
Argonne National Laboratory, Argonne IL 60439
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Abstract

We have developed a new type of powder diffractometer. The diffractometer has the potential of both high count rates and very high resolution when used at a synchrotron source. The laboratory based instrument can achieve an order of magnitude improvement in count rate over existing methods with proper optics. The method uses a focusing diffracted beam monochromator in combination with a multichannel detector. The incident x-rays fall on a flat plate or capillary sample and are intercepted by a bent focusing monochromator which has the focus of the bend at the sample surface. The powder diffraction lines emerging from the bent crystal monochromator are detected by a linear or 2-dimensional detector. This allows us to eliminate the background from fluorescence or other scattering and to take data over a range of 3° to 4° instead of one angle at a time thereby providing a large improvement over conventional diffractometers.

Type
X. XRD Techniques and Instrumentation
Information
Advances in X-Ray Analysis , Volume 36: Forty-First Annual Conference on Applications of X-ray Analysis, August 3-7, 1992 , 1992 , pp. 653 - 661
Copyright
Copyright © International Centre for Diffraction Data 1992

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References

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