In-situ polarized 3He-based neutron polarization analyzer for SNS magnetism reflectometer

W. T. Lee; X. Tong; J. Pierce; M. Fleenor; A. Ismaili; J. L. Robertson; W. C. Chen; T. R. Gentile; A. Hailemariam; R. Goyette; A. Parizzi; V. Lauter; F. Klose; H. Kaiser; C. Lavelle; D. V. Baxter; G. L. Jones; J. Wexler; L. McCollum

doi:10.1088/1742-6596/251/1/012086

In-situ polarized ³He-based neutron polarization analyzer for SNS magnetism reflectometer

W. T. Lee, X. Tong, J. Pierce, M. Fleenor, A. Ismaili, J. L. Robertson, W. C. Chen, T. R. Gentile, A. Hailemariam, R. Goyette, A. Parizzi, V. Lauter, F. Klose, H. Kaiser, C. Lavelle, D. V. Baxter, G. L. Jones, J. Wexler, L. McCollum

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Abstract

We report here the construction and neutron transmission test results of an in-situ polarized ³He-based neutron polarization analyzer system for the Magnetism Reflectometer at the Spallation Neutron Source, Oak Ridge National Laboratory. The analyzer uses the Spin-Exchange Optical Pumping method to polarize the ³He nuclei of a cell of ³He gas. Polarized neutrons scattered from the sample are intercepted by the polarized ³He gas which strongly absorbs neutrons in one spin-state while allowing most neutrons in the other spin-state to pass through. To maintain a stable analyzing efficiency during an experiment, the ³He gas is continuously polarized in-situ on the instrument. Neutron transmission measurements showed that 73% ³He polarization was reached in this setup.

Original language	English
Article number	012086
Journal	Journal of Physics: Conference Series
Volume	251
Issue number	1
DOIs	https://doi.org/10.1088/1742-6596/251/1/012086
State	Published - 2010

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Lee, W. T., Tong, X., Pierce, J., Fleenor, M., Ismaili, A., Robertson, J. L., Chen, W. C., Gentile, T. R., Hailemariam, A., Goyette, R., Parizzi, A., Lauter, V., Klose, F., Kaiser, H., Lavelle, C., Baxter, D. V., Jones, G. L., Wexler, J., & McCollum, L. (2010). In-situ polarized ³He-based neutron polarization analyzer for SNS magnetism reflectometer. Journal of Physics: Conference Series, 251(1), Article 012086. https://doi.org/10.1088/1742-6596/251/1/012086

@article{2598e63fc36e4930b3bdb41f42813ac2,

title = "In-situ polarized 3He-based neutron polarization analyzer for SNS magnetism reflectometer",

abstract = "We report here the construction and neutron transmission test results of an in-situ polarized 3He-based neutron polarization analyzer system for the Magnetism Reflectometer at the Spallation Neutron Source, Oak Ridge National Laboratory. The analyzer uses the Spin-Exchange Optical Pumping method to polarize the 3He nuclei of a cell of 3He gas. Polarized neutrons scattered from the sample are intercepted by the polarized 3He gas which strongly absorbs neutrons in one spin-state while allowing most neutrons in the other spin-state to pass through. To maintain a stable analyzing efficiency during an experiment, the 3He gas is continuously polarized in-situ on the instrument. Neutron transmission measurements showed that 73% 3He polarization was reached in this setup.",

author = "Lee, {W. T.} and X. Tong and J. Pierce and M. Fleenor and A. Ismaili and Robertson, {J. L.} and Chen, {W. C.} and Gentile, {T. R.} and A. Hailemariam and R. Goyette and A. Parizzi and V. Lauter and F. Klose and H. Kaiser and C. Lavelle and Baxter, {D. V.} and Jones, {G. L.} and J. Wexler and L. McCollum",

year = "2010",

doi = "10.1088/1742-6596/251/1/012086",

language = "English",

volume = "251",

journal = "Journal of Physics: Conference Series",

issn = "1742-6588",

number = "1",

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Lee, WT, Tong, X, Pierce, J, Fleenor, M, Ismaili, A, Robertson, JL, Chen, WC, Gentile, TR, Hailemariam, A, Goyette, R, Parizzi, A , Lauter, V, Klose, F, Kaiser, H, Lavelle, C, Baxter, DV, Jones, GL, Wexler, J & McCollum, L 2010, 'In-situ polarized ³He-based neutron polarization analyzer for SNS magnetism reflectometer', Journal of Physics: Conference Series, vol. 251, no. 1, 012086. https://doi.org/10.1088/1742-6596/251/1/012086

TY - JOUR

T1 - In-situ polarized 3He-based neutron polarization analyzer for SNS magnetism reflectometer

AU - Lee, W. T.

AU - Tong, X.

AU - Pierce, J.

AU - Fleenor, M.

AU - Ismaili, A.

AU - Robertson, J. L.

AU - Chen, W. C.

AU - Gentile, T. R.

AU - Hailemariam, A.

AU - Goyette, R.

AU - Parizzi, A.

AU - Lauter, V.

AU - Klose, F.

AU - Kaiser, H.

AU - Lavelle, C.

AU - Baxter, D. V.

AU - Jones, G. L.

AU - Wexler, J.

AU - McCollum, L.

PY - 2010

Y1 - 2010

N2 - We report here the construction and neutron transmission test results of an in-situ polarized 3He-based neutron polarization analyzer system for the Magnetism Reflectometer at the Spallation Neutron Source, Oak Ridge National Laboratory. The analyzer uses the Spin-Exchange Optical Pumping method to polarize the 3He nuclei of a cell of 3He gas. Polarized neutrons scattered from the sample are intercepted by the polarized 3He gas which strongly absorbs neutrons in one spin-state while allowing most neutrons in the other spin-state to pass through. To maintain a stable analyzing efficiency during an experiment, the 3He gas is continuously polarized in-situ on the instrument. Neutron transmission measurements showed that 73% 3He polarization was reached in this setup.

AB - We report here the construction and neutron transmission test results of an in-situ polarized 3He-based neutron polarization analyzer system for the Magnetism Reflectometer at the Spallation Neutron Source, Oak Ridge National Laboratory. The analyzer uses the Spin-Exchange Optical Pumping method to polarize the 3He nuclei of a cell of 3He gas. Polarized neutrons scattered from the sample are intercepted by the polarized 3He gas which strongly absorbs neutrons in one spin-state while allowing most neutrons in the other spin-state to pass through. To maintain a stable analyzing efficiency during an experiment, the 3He gas is continuously polarized in-situ on the instrument. Neutron transmission measurements showed that 73% 3He polarization was reached in this setup.

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DO - 10.1088/1742-6596/251/1/012086

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SN - 1742-6588

VL - 251

JO - Journal of Physics: Conference Series

JF - Journal of Physics: Conference Series

IS - 1

M1 - 012086

ER -

In-situ polarized ³He-based neutron polarization analyzer for SNS magnetism reflectometer

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