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High resolution neutron Larmor diffraction using superconducting magnetic Wollaston prisms [electronic resource].

Published:
Washington, D.C. : United States. Dept. of Energy. Office of Science, 2017.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy
Physical Description:
Article numbers 865 : digital, PDF file
Additional Creators:
Oak Ridge National Laboratory, United States. Department of Energy. Office of Science, National Science Foundation (U.S.), and United States. Department of Energy. Office of Scientific and Technical Information
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Summary:
The neutron Larmor diffraction technique has been implemented using superconducting magnetic Wollaston prisms in both single-arm and double-arm configurations. Successful measurements of the coefficient of thermal expansion of a single-crystal copper sample demonstrates that the method works as expected. Our experiment involves a new method of tuning by varying the magnetic field configurations in the device and the tuning results agree well with previous measurements. The difference between single-arm and double-arm configurations has been investigated experimentally. Here, we conclude that this measurement benchmarks the applications of magnetic Wollaston prisms in Larmor diffraction and shows in principle that the setup can be used for inelastic phonon line-width measurements. The achievable resolution for Larmor diffraction is comparable to that using Neutron Resonance Spin Echo (NRSE) coils. Furthermore, the use of superconducting materials in the prisms allows high neutron polarization and transmission efficiency to be achieved.
Report Numbers:
E 1.99:1352771
Subject(s):
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Note:
Published through SciTech Connect.
04/13/2017.
"KC0402010"
"ERKCSNX"
Scientific Reports 7 1 ISSN 2045-2322 AM
Fankang Li; Hao Feng; Alexander N. Thaler; Steven R. Parnell; William A. Hamilton; Lowell Crow; Wencao Yang; Amy B. Jones; Hongyu Bai; Masaaki Matsuda; David V. Baxter; Thomas Keller; Jaime A. Fernandez-Baca; Roger Pynn.
Funding Information:
AC05-00OR22725
AC02-76SF00515
1121053
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