Neutron adiabaticity and its impact on data analysis, illustrated for polarized GISANS

Annika Stellhorn; Wai-tung Lee; Emmanuel Kentzinger; Wangchun Chen; Jonathan Gaudet; Kathryn Krycka; Elizabeth Blackburn

doi:10.1051/epjconf/202328606002

Neutron adiabaticity and its impact on data analysis, illustrated for polarized GISANS

Annika Stellhorn, Wai-tung Lee, Emmanuel Kentzinger, Wangchun Chen, Jonathan Gaudet, Kathryn Krycka, Elizabeth Blackburn

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

Abstract

The significance of neutron spin adiabaticity in the data analysis of polarized Grazing Incidence Small Angle Neutron Scattering (GISANS) is discussed, with the aim of minimizing the number of simulation parameters of complex magnetic models within the neutron scattering cross-section. We illustrate how an estimate of the neutron polarization direction and adiabaticity can be obtained by magnetic field and neutron ray-tracing simulations and compare the results with measurements of the magnetic field map for the beamline used in the GISANS experiment. We show how small deviations from the neutron polarization direction with respect to the magnetic field vector at the sample position significantly affect the data analysis, and how this can be considered within the magnetic model of the scattering cross section using the Distorted Wave Born Approximation.

Original language	English
Article number	06002
Journal	EPJ Web of Conferences
Volume	286
DOIs	https://doi.org/10.1051/epjconf/202328606002
Publication status	Published - 2023 Oct 1

Subject classification (UKÄ)

Condensed Matter Physics
Other Engineering and Technologies not elsewhere specified

Access to Document

10.1051/epjconf/202328606002Licence: CC BY

https://www.epj-conferences.org/10.1051/epjconf/202328606002

1 Article

Polarisation Development at the European Spallation Source
Lee, W. T., Hagman, J., Martin rodriguez, D., Stellhorn, A., Backs, A., Arnold, T., Blackburn, E., Deen, P., Durniak, C., Feygenson, M., Holmes, A. T., Houston, J., Jaksch, S., Kirstein, O., Mannix, D., Månsson, M., Morgano, M., Nilsen, G., Noferini, D. & Nylander, T. & 10 others, Orlov, D., Santoro, V., Schmidt, S., Schulz, M., Schweika, W., Tartaglione, A., Toft-Petersen, R., Villacorta, F. J., Wolff, M. & Woracek, R., 2023 Oct 1, In: EPJ Web of Conferences. 286, p. 03004 9 p.
Research output: Contribution to journal › Article › peer-review

Open Access

1 Active
2 Finished

Wide-angle neutron polarisation analysis to study energy and quantum materials
Blackburn, E. (PI)
Swedish Research Council
2021/12/01 → 2026/12/31
Project: Research
SAGA – Preparing for a GISANS instrument at ESS – A Swedish Initiative
Nylander, T. (PI)
2021/12/01 → 2024/11/30
Project: Research
SREss3: Polarisation for first science and beyond at the ESS
Lee, W. T. (PI), Orlov, D. (CoPI), Blackburn, E. (CoPI) & Nylander, T. (CoPI)
2020/10/01 → 2024/08/31
Project: Research

Cite this

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title = "Neutron adiabaticity and its impact on data analysis, illustrated for polarized GISANS",

abstract = "The significance of neutron spin adiabaticity in the data analysis of polarized Grazing Incidence Small Angle Neutron Scattering (GISANS) is discussed, with the aim of minimizing the number of simulation parameters of complex magnetic models within the neutron scattering cross-section. We illustrate how an estimate of the neutron polarization direction and adiabaticity can be obtained by magnetic field and neutron ray-tracing simulations and compare the results with measurements of the magnetic field map for the beamline used in the GISANS experiment. We show how small deviations from the neutron polarization direction with respect to the magnetic field vector at the sample position significantly affect the data analysis, and how this can be considered within the magnetic model of the scattering cross section using the Distorted Wave Born Approximation.",

author = "Annika Stellhorn and Wai-tung Lee and Emmanuel Kentzinger and Wangchun Chen and Jonathan Gaudet and Kathryn Krycka and Elizabeth Blackburn",

year = "2023",

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doi = "10.1051/epjconf/202328606002",

language = "English",

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journal = "EPJ Web of Conferences",

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T1 - Neutron adiabaticity and its impact on data analysis, illustrated for polarized GISANS

AU - Stellhorn, Annika

AU - Lee, Wai-tung

AU - Kentzinger, Emmanuel

AU - Chen, Wangchun

AU - Gaudet, Jonathan

AU - Krycka, Kathryn

AU - Blackburn, Elizabeth

PY - 2023/10/1

Y1 - 2023/10/1

N2 - The significance of neutron spin adiabaticity in the data analysis of polarized Grazing Incidence Small Angle Neutron Scattering (GISANS) is discussed, with the aim of minimizing the number of simulation parameters of complex magnetic models within the neutron scattering cross-section. We illustrate how an estimate of the neutron polarization direction and adiabaticity can be obtained by magnetic field and neutron ray-tracing simulations and compare the results with measurements of the magnetic field map for the beamline used in the GISANS experiment. We show how small deviations from the neutron polarization direction with respect to the magnetic field vector at the sample position significantly affect the data analysis, and how this can be considered within the magnetic model of the scattering cross section using the Distorted Wave Born Approximation.

AB - The significance of neutron spin adiabaticity in the data analysis of polarized Grazing Incidence Small Angle Neutron Scattering (GISANS) is discussed, with the aim of minimizing the number of simulation parameters of complex magnetic models within the neutron scattering cross-section. We illustrate how an estimate of the neutron polarization direction and adiabaticity can be obtained by magnetic field and neutron ray-tracing simulations and compare the results with measurements of the magnetic field map for the beamline used in the GISANS experiment. We show how small deviations from the neutron polarization direction with respect to the magnetic field vector at the sample position significantly affect the data analysis, and how this can be considered within the magnetic model of the scattering cross section using the Distorted Wave Born Approximation.

U2 - 10.1051/epjconf/202328606002

DO - 10.1051/epjconf/202328606002

M3 - Article

SN - 2100-014X

VL - 286

JO - EPJ Web of Conferences

JF - EPJ Web of Conferences

M1 - 06002

ER -

Neutron adiabaticity and its impact on data analysis, illustrated for polarized GISANS

Abstract

Subject classification (UKÄ)

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Research output

Polarisation Development at the European Spallation Source

Projects

Wide-angle neutron polarisation analysis to study energy and quantum materials

SAGA – Preparing for a GISANS instrument at ESS – A Swedish Initiative

SREss3: Polarisation for first science and beyond at the ESS

Cite this