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Anticlastic Curvature of Elastically Bent Crystals for Sagittal Focusing

Published online by Cambridge University Press:  15 February 2011

J. P. Quintana ,
V. I. Kushnir  and
P. Georgopoulos
J. P. Quintana
Affiliation:
DND-CAT Synchrotron Research Center, Robert R.McCormick School of Engineering and Applied Science, Northwestern University, Evanston, Illinois 60208
V. I. Kushnir
Affiliation:
Advanced Photon Source - XFD/362, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439-4815
P. Georgopoulos
Affiliation:
DND-CAT Synchrotron Research Center, Robert R.McCormick School of Engineering and Applied Science, Northwestern University, Evanston, Illinois 60208
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Abstract

Finite element results are presented for the case of an elastically bent isotropic rectangular crystal with clamped boundary conditions. Results show that the anticlastic curvature can be eliminated in the center of the crystal provided the crystal length to width ratio fits a “golden aspect ratio” which is dependent on the Poisson coefficient ν. For ν=0.262 (appropriate for Si(111)), this ratio is approximately equal to 1.42.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 307: Symposium L – Applications of Synchrotron Radiation Techniques to Materials Science , 1993 , 349
Copyright
Copyright © Materials Research Society 1993

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References

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