The technique of longitudinal (“xyz”) polarization analysis has been used successfully for many years to study disordered magnetic materials in thermal and cold neutron diffraction experiments. The technique allows the simultaneous and unambiguous separation of the nuclear, magnetic, and nuclear spin-incoherent contributions to the scattering. The technical advances seen in recent years, such as the availability of polarized 3He analyzer cells to cover a large detector solid angle, the ability to detect out-of-plane scattering in a multi-detector, and a significant increase of the usable beam divergence, call for a generalization of the method. A general treatment of the formalism for carrying out neutron polarization analysis will be given in this paper, which describes a possible method of usage at a future, modern diffractometer or inelastic spectrometer with large area multi-detector coverage.
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September 2013
Research Article|
September 03 2013
Generalization of the classical xyz-polarization analysis technique to out-of-plane and inelastic scattering
G. Ehlers;
G. Ehlers
1Quantum Condensed Matter Division,
Oak Ridge National Laboratory
, Oak Ridge, Tennessee 37831, USA
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J. R. Stewart;
J. R. Stewart
2ISIS,
Rutherford Appleton Laboratory
, Chilton, Didcot OX11 0QX, United Kingdom
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A. R. Wildes;
A. R. Wildes
3
Institut Laue-Langevin
, 156X, 38042 Grenoble Cedex, France
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P. P. Deen;
P. P. Deen
4
European Spallation Source ESS AB
, Box 176, 22100 Lund, Sweden
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K. H. Andersen
K. H. Andersen
4
European Spallation Source ESS AB
, Box 176, 22100 Lund, Sweden
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Rev. Sci. Instrum. 84, 093901 (2013)
Article history
Received:
July 03 2013
Accepted:
August 15 2013
Citation
G. Ehlers, J. R. Stewart, A. R. Wildes, P. P. Deen, K. H. Andersen; Generalization of the classical xyz-polarization analysis technique to out-of-plane and inelastic scattering. Rev. Sci. Instrum. 1 September 2013; 84 (9): 093901. https://doi.org/10.1063/1.4819739
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