Application of a portable 3He-based polarization insert at a time-of-flight neutron reflectometer

Wolfgang Kreuzpaintner; Sergey Masalovich; Jean François Moulin; Birgit Wiedemann; Jingfan Ye; Sina Mayr; Amitesh Paul; Martin Haese; Matthias Pomm; Peter Böni

doi:10.1016/j.nima.2016.12.017

Application of a portable ³He-based polarization insert at a time-of-flight neutron reflectometer

Wolfgang Kreuzpaintner, Sergey Masalovich, Jean François Moulin, Birgit Wiedemann, Jingfan Ye, Sina Mayr, Amitesh Paul, Martin Haese, Matthias Pomm, Peter Böni

Natural Sciences

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

4 Scopus citations

Abstract

The suitability of a transportable ³He-spin filter as temporary broadband polarizer for a Time-of-Flight neutron reflectometer is demonstrated. A simple two-wavelength method for characterisation of a ³He-spin filter is proposed, which can be applied even if the absolute transmittance of the ³He-spin filter cannot be accurately determined. We demonstrate the data treatment procedure for extracting the spin-up and spin-down neutron reflectivity from measurements obtained with a time dependent ³He polarization. The extraction of a very weak magnetic signal from reflectivity data, measured on the in-situ grown magnetic heterostructure Fe_1nm/Cu_20nm/Si_substrate in an externally applied magnetic field of 30 mT is presented and compared to similar measurements on the growth stage Cu_20nm/Si_substrate of the very same sample, which does not yet contain any magnetic material.

Original language	English
Pages (from-to)	144-152
Number of pages	9
Journal	Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume	848
DOIs	https://doi.org/10.1016/j.nima.2016.12.017
State	Published - 11 Mar 2017

Keywords

Data treatment procedure
Polarization insert
Polarized neutron reflectometry
Portable He-spin filter
Time-of-flight neutron reflectometer

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10.1016/j.nima.2016.12.017

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Kreuzpaintner, W., Masalovich, S., Moulin, J. F., Wiedemann, B., Ye, J., Mayr, S., Paul, A., Haese, M., Pomm, M., & Böni, P. (2017). Application of a portable ³He-based polarization insert at a time-of-flight neutron reflectometer. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 848, 144-152. https://doi.org/10.1016/j.nima.2016.12.017

@article{c9a0413980494b259c4474c8660bfa25,

title = "Application of a portable 3He-based polarization insert at a time-of-flight neutron reflectometer",

abstract = "The suitability of a transportable 3He-spin filter as temporary broadband polarizer for a Time-of-Flight neutron reflectometer is demonstrated. A simple two-wavelength method for characterisation of a 3He-spin filter is proposed, which can be applied even if the absolute transmittance of the 3He-spin filter cannot be accurately determined. We demonstrate the data treatment procedure for extracting the spin-up and spin-down neutron reflectivity from measurements obtained with a time dependent 3He polarization. The extraction of a very weak magnetic signal from reflectivity data, measured on the in-situ grown magnetic heterostructure Fe1nm/Cu20nm/Sisubstrate in an externally applied magnetic field of 30 mT is presented and compared to similar measurements on the growth stage Cu20nm/Sisubstrate of the very same sample, which does not yet contain any magnetic material.",

keywords = "Data treatment procedure, Polarization insert, Polarized neutron reflectometry, Portable He-spin filter, Time-of-flight neutron reflectometer",

author = "Wolfgang Kreuzpaintner and Sergey Masalovich and Moulin, \{Jean Fran{\c c}ois\} and Birgit Wiedemann and Jingfan Ye and Sina Mayr and Amitesh Paul and Martin Haese and Matthias Pomm and Peter B{\"o}ni",

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year = "2017",

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doi = "10.1016/j.nima.2016.12.017",

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Kreuzpaintner, W, Masalovich, S, Moulin, JF, Wiedemann, B, Ye, J, Mayr, S, Paul, A, Haese, M, Pomm, M & Böni, P 2017, 'Application of a portable ³He-based polarization insert at a time-of-flight neutron reflectometer', Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, vol. 848, pp. 144-152. https://doi.org/10.1016/j.nima.2016.12.017

Application of a portable ³He-based polarization insert at a time-of-flight neutron reflectometer. / Kreuzpaintner, Wolfgang; Masalovich, Sergey; Moulin, Jean François et al.
In: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 848, 11.03.2017, p. 144-152.

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

TY - JOUR

T1 - Application of a portable 3He-based polarization insert at a time-of-flight neutron reflectometer

AU - Kreuzpaintner, Wolfgang

AU - Masalovich, Sergey

AU - Moulin, Jean François

AU - Wiedemann, Birgit

AU - Ye, Jingfan

AU - Mayr, Sina

AU - Paul, Amitesh

AU - Haese, Martin

AU - Pomm, Matthias

AU - Böni, Peter

PY - 2017/3/11

Y1 - 2017/3/11

N2 - The suitability of a transportable 3He-spin filter as temporary broadband polarizer for a Time-of-Flight neutron reflectometer is demonstrated. A simple two-wavelength method for characterisation of a 3He-spin filter is proposed, which can be applied even if the absolute transmittance of the 3He-spin filter cannot be accurately determined. We demonstrate the data treatment procedure for extracting the spin-up and spin-down neutron reflectivity from measurements obtained with a time dependent 3He polarization. The extraction of a very weak magnetic signal from reflectivity data, measured on the in-situ grown magnetic heterostructure Fe1nm/Cu20nm/Sisubstrate in an externally applied magnetic field of 30 mT is presented and compared to similar measurements on the growth stage Cu20nm/Sisubstrate of the very same sample, which does not yet contain any magnetic material.

AB - The suitability of a transportable 3He-spin filter as temporary broadband polarizer for a Time-of-Flight neutron reflectometer is demonstrated. A simple two-wavelength method for characterisation of a 3He-spin filter is proposed, which can be applied even if the absolute transmittance of the 3He-spin filter cannot be accurately determined. We demonstrate the data treatment procedure for extracting the spin-up and spin-down neutron reflectivity from measurements obtained with a time dependent 3He polarization. The extraction of a very weak magnetic signal from reflectivity data, measured on the in-situ grown magnetic heterostructure Fe1nm/Cu20nm/Sisubstrate in an externally applied magnetic field of 30 mT is presented and compared to similar measurements on the growth stage Cu20nm/Sisubstrate of the very same sample, which does not yet contain any magnetic material.

KW - Data treatment procedure

KW - Polarization insert

KW - Polarized neutron reflectometry

KW - Portable He-spin filter

KW - Time-of-flight neutron reflectometer

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U2 - 10.1016/j.nima.2016.12.017

DO - 10.1016/j.nima.2016.12.017

M3 - Article

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SN - 0168-9002

VL - 848

SP - 144

EP - 152

JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

ER -

Application of a portable ³He-based polarization insert at a time-of-flight neutron reflectometer

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