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Synchrotron Radiation Diffraction Imaging Study of the Magnetoacoustically Induced X-Ray Focusing Effect in FeBO3

Published online by Cambridge University Press:  10 February 2011

I. Matsouli ,
V. V. Kvardakov ,
J. I. Espeso ,
L. Chabert  and
J. Baruchel
I. Matsouli
Affiliation:
ESRF, BP 220, Grenoble 38043, France, [email protected] University of Warwick, Coventry, CV4 7AL, UK
V. V. Kvardakov
Affiliation:
Kurchatov Institute of Atomic Energy, Moscow 123182, Russia
J. I. Espeso
Affiliation:
ESRF, BP 220, Grenoble 38043, France Universidad de Cantabria, Santander, Spain
L. Chabert
Affiliation:
ESRF, BP 220, Grenoble 38043, France
J. Baruchel
Affiliation:
ESRF, BP 220, Grenoble 38043, France
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Abstract

Synchrotron radiation diffraction imaging (‘topography’) was used at the ESRF to visualize ultrasonic standing waves in a magnetoacoustically excited FeBO3 crystal. Images were recorded at long sample-to-film distances (up to 1.5 m) without substantial loss of resolution. The resonant patterns reveal that the crystal acts as a pulsed X-ray focusing lens and strongly depend on both the amplitude of the magnetic field and the sample-to-detector distance. Different resonant frequencies can also lead to more complicated images due to interference effects of several vibrating modes present in the crystal. A model is proposed followed by a numerical integration which predicts the focusing of the X-ray beam and demonstrates the agreement between theory and experiment. This effect could be used to simultaneously monochromatize and focus the X-ray beam.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 524: Symposium V – Application of Synchrotron Radiation Techniques…IV , 1998 , 59
Copyright
Copyright © Materials Research Society 1998

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References

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