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Applied Physics A

, Volume 99, Issue 3, pp 635–639 | Cite as

Nested neutron microfocusing optics on SNAP

  • G. E. IceEmail author
  • J.-Y. Choi
  • P. Z. Takacs
  • A. Khounsary
  • Y. Puzyrev
  • J. J. Molaison
  • C. A. Tulk
  • K. H. Andersen
  • T. Bigault
Article

Abstract

The high source intensity of the Spallation Neutron Source (SNS), together with efficient detectors and large detector solid angles, now makes possible neutron experiments with much smaller sample volumes than previously were practical. Nested Kirkpatrick–Baez supermirror optics provide a promising and efficient way to further decrease the useable neutron sample size by focusing polychromatic neutrons into microbeams. Because the optics are nondispersive, they are ideal for spallation sources and for polychromatic and wide bandpass experiments on reactor sources. Theoretical calculations indicate that nested mirrors can preserve source brilliance at the sample for small beams and for modest divergences that are appropriate for diffraction experiments. Although the flux intercepted by a sample can be similar with standard beam-guided approaches, the signal-to-background is much improved with small beams on small samples. Here we describe the design, calibration and performance of a nested neutron mirror pair for the Spallation Neutrons At Pressure (SNAP) beamline at the SNS. High-pressure neutron diffraction is but one example of a large class of neutron experiments that will benefit from spatially-resolved microdiffraction.

Keywords

Mirror System Image Distance Leaf Spring Focal Spot Size Small Beam 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    G.E. Ice, C.R. Hubbard, B.C. Larson, J.W.L. Pang, J.D. Budai, S. Spooner, S.C. Vogel, Kirkpatrick–Baez microfocusing optics for thermal neutrons. Nucl. Instrum. Methods Phys. Res. A 539, 312 (2005) CrossRefADSGoogle Scholar
  2. 2.
    G.E. Ice, C.R. Hubbard, B.C. Larson, J.W.L. Pang, J.D. Budai, S. Spooner, S.C. Vogel, R.B. Rogge, J.H. Fox, R.L. Donaberger, High-performance Kirkpatrick–Baez supermirrors for neutron milli- and micro-beams. Mater. Sci. Eng. A 437(1), 120–125 (2006) CrossRefGoogle Scholar
  3. 3.
    G.E. Ice, The future of polychromatic microdiffraction. Metall. Mater. Trans. A 39A, 3058–3064 (2008) CrossRefADSGoogle Scholar
  4. 4.
    M.R. Howells, D. Cambie, R.M. Duarte, S. Irick, A. MacDowell, H.A. Padmore, T. Renner, S. Rah, R. Sandler, Opt. Eng. 39, 2748 (2000) CrossRefADSGoogle Scholar
  5. 5.
    Y.S. Puzyrev, G.E. Ice, P.Z. Takacs, Long-trace profiler for neutron focusing mirrors. Nucl. Instrum. Methods A 598, 515–517 (2009) CrossRefADSGoogle Scholar

Copyright information

© Springer-Verlag 2010

Authors and Affiliations

  • G. E. Ice
    • 1
    Email author
  • J.-Y. Choi
    • 2
  • P. Z. Takacs
    • 3
  • A. Khounsary
    • 4
  • Y. Puzyrev
    • 1
  • J. J. Molaison
    • 5
  • C. A. Tulk
    • 5
  • K. H. Andersen
    • 6
  • T. Bigault
    • 6
  1. 1.MST DivisionOak Ridge National LaboratoryOak RidgeUSA
  2. 2.Pohang Accelerator LaboratoryPohangKorea
  3. 3.Instrumentation DivisionBrookhaven National LaboratoryUptonUSA
  4. 4.Advanced Photon SourceArgonne National LaboratoryArgonneUSA
  5. 5.Spallation Neutron SourceOak Ridge National LaboratoryOak RidgeUSA
  6. 6.Institut Laue–LangevinGrenobleFrance

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