Smooth interfaces of multilayer monochromators

J. Padiyath; J. Stahn; P. Allenspach; M. Horisberger; M. Gupta; T. Gutberlet; P. Böni

doi:10.1016/j.physb.2004.11.061

Smooth interfaces of multilayer monochromators

J. Padiyath, J. Stahn, P. Allenspach, M. Horisberger, M. Gupta, T. Gutberlet, P. Böni

Natural Sciences

Paul Scherrer Institut

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

Monochromators used in neutron or X-ray experiments sometimes have unintended higher order contributions. In most cases filters are used to remove them. We sputtered multilayer monochromators with smooth interfaces to reduce the higher order contributions removing the need for a filter. Ni and Ti are selected as sublayer materials due to their high scattering length density contrast. We have strongly reduced the higher order contributions by annealing. This reduces the roughness and off-specular scattering, however the second and third-order Bragg peak intensities increase unexpectedly in neutron reflectivity experiments.

Original language	English
Pages (from-to)	218-221
Number of pages	4
Journal	Physica B: Condensed Matter
Volume	357
Issue number	1-2 SPEC. ISS.
DOIs	https://doi.org/10.1016/j.physb.2004.11.061
State	Published - 28 Feb 2005

Keywords

Bilayer
Diffusion
Monochromator
Ni
Ti

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10.1016/j.physb.2004.11.061

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title = "Smooth interfaces of multilayer monochromators",

abstract = "Monochromators used in neutron or X-ray experiments sometimes have unintended higher order contributions. In most cases filters are used to remove them. We sputtered multilayer monochromators with smooth interfaces to reduce the higher order contributions removing the need for a filter. Ni and Ti are selected as sublayer materials due to their high scattering length density contrast. We have strongly reduced the higher order contributions by annealing. This reduces the roughness and off-specular scattering, however the second and third-order Bragg peak intensities increase unexpectedly in neutron reflectivity experiments.",

keywords = "Bilayer, Diffusion, Monochromator, Ni, Ti",

author = "J. Padiyath and J. Stahn and P. Allenspach and M. Horisberger and M. Gupta and T. Gutberlet and P. B{\"o}ni",

note = "Funding Information: We thank H. Grimmer for his help and discussion for the X-ray measurements. Financial support by the Swiss National Science Foundation is gratefully acknowledged. This work was performed at the Swiss Spallation Neutron Source, Paul Scherrer Institute, Villigen, Switzerland.",

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T1 - Smooth interfaces of multilayer monochromators

AU - Padiyath, J.

AU - Stahn, J.

AU - Allenspach, P.

AU - Horisberger, M.

AU - Gupta, M.

AU - Gutberlet, T.

AU - Böni, P.

N1 - Funding Information: We thank H. Grimmer for his help and discussion for the X-ray measurements. Financial support by the Swiss National Science Foundation is gratefully acknowledged. This work was performed at the Swiss Spallation Neutron Source, Paul Scherrer Institute, Villigen, Switzerland.

PY - 2005/2/28

Y1 - 2005/2/28

N2 - Monochromators used in neutron or X-ray experiments sometimes have unintended higher order contributions. In most cases filters are used to remove them. We sputtered multilayer monochromators with smooth interfaces to reduce the higher order contributions removing the need for a filter. Ni and Ti are selected as sublayer materials due to their high scattering length density contrast. We have strongly reduced the higher order contributions by annealing. This reduces the roughness and off-specular scattering, however the second and third-order Bragg peak intensities increase unexpectedly in neutron reflectivity experiments.

AB - Monochromators used in neutron or X-ray experiments sometimes have unintended higher order contributions. In most cases filters are used to remove them. We sputtered multilayer monochromators with smooth interfaces to reduce the higher order contributions removing the need for a filter. Ni and Ti are selected as sublayer materials due to their high scattering length density contrast. We have strongly reduced the higher order contributions by annealing. This reduces the roughness and off-specular scattering, however the second and third-order Bragg peak intensities increase unexpectedly in neutron reflectivity experiments.

KW - Bilayer

KW - Diffusion

KW - Monochromator

KW - Ni

KW - Ti

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U2 - 10.1016/j.physb.2004.11.061

DO - 10.1016/j.physb.2004.11.061

M3 - Article

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EP - 221

JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

IS - 1-2 SPEC. ISS.

ER -

Smooth interfaces of multilayer monochromators

Abstract

Keywords

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