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Polycapillary Optics for in Situ Diagnostics

Published online by Cambridge University Press:  10 February 2011

F. A. Hofmann ,
N. Gao ,
S. M. Owens ,
W. M. Gibson ,
C. A. Macdonald  and
S. M. Lee
F. A. Hofmann
Affiliation:
University at Albany, Center for X-Ray Optics, Albany, NY 12222, U.S.A.
N. Gao
Affiliation:
X-Ray Optical Systems Inc., 30 Corporate Circle, Albany, NY 12203, U.S.A.
S. M. Owens
Affiliation:
University at Albany, Center for X-Ray Optics, Albany, NY 12222, U.S.A.
W. M. Gibson
Affiliation:
University at Albany, Center for X-Ray Optics, Albany, NY 12222, U.S.A.
C. A. Macdonald
Affiliation:
University at Albany, Center for X-Ray Optics, Albany, NY 12222, U.S.A.
S. M. Lee
Affiliation:
University at Albany, Center for X-Ray Optics, Albany, NY 12222, U.S.A.
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Abstract

Polycapillary optics, shaped arrays consisting of hundreds of thousands of hollow glass capillary tubes, are used to redirect, collimate, or focus x-ray beams from conventional laboratory-based sources. Focused spot sizes as small as 20μm have been measured, with flux densities two orders of magnitude larger than that produced by pinhole or crossed slit collimation. Such flux increases have made possible faster and more sensitive x-ray fluorescence (XRF) and diffraction measurements to the extent that in situ measurements become possible. XRF data taken with a 12 W source were comparable to data taken with a 1.5 kW source. Ex situ diffraction and texture measurements on thin multilayered films and single crystal silicon demonstrate the tremendous experimental and analytical improvements made possible by polycapillary optics.

With 0.5° and 2° focusing polycapillary x-ray optics, diffraction intensity gains of more than two orders of magnitude were measured on small Lysozyme protein crystals with exposure times an order of magnitude less than required by traditional measurement techniques

In addition, the optics greatly reduce the background high energy Bremsstrahlung, permitting more accurate analysis of thin complex multilayer diffraction peaks. Rapid measurement times resulting from the application of these polycapillary optics, indicate tremendous possibilities for in situ process monitoring

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 502: Symposium II – In Situ Process Diagnostics & Intelligent Materials Processing , 1997 , 133
Copyright
Copyright © Materials Research Society 1998

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References

REFERENCES

1 Arkd'ev, V. A., Kolomitsev, A. I., Kumakhov, M. A., Ponorave, I. Yu., Khodeev, I. A., Chertov, Yu. P. and Shakparonov, I. M., Sov. Phys. Usp. 32 (3), p. 271, March 1989.Google Scholar
2 Jentzch, F., Phys. Z. 30, p. 1268, 1929.Google Scholar
3 Hirsch, P. B. and Keller, J. N., Phys. Soc. (London) B64, 1951.Google Scholar
4 Owens, S. M., Ullrich, J. B., Ponomarev, I. Yu., Carter, D. C., Sisk, R. C., Ho, J. X. and Gibson, W. M., “Polycapillary X-Ray Optics for Macromolecular Crystallography,” SPIE vol. 2859, p.200–209, 1996.Google Scholar
5 Kennedy, R., Xiao, Q-F., Ryan, T. and York, B. R.: European Powder Diffraction Conference (EPDIC) 1997.Google Scholar
6 Gao, N., Ponomarov, I. Yu., Xiao, Q.-F., Gibson, W. M., and Carpenter, D. A., Appl. Phys. Lett. 69, 1529 (1996).Google Scholar
7 York, B. R. and Xiao, Qi-Fan, Denver X-Ray Conference, Aug 4–8, 1997, Steamboat Springs, CO.Google Scholar