POLANO: Wide angle spin analysis using polarizing supermirrors m = 5.5

M. Schneider; C. Schanzer; P. Böni; U. Filges; M. Fujita; Y. Nambu; M. Ohkawara; T. Yokoo; S. Itoh

doi:10.1016/j.nima.2020.164272

POLANO: Wide angle spin analysis using polarizing supermirrors m = 5.5

M. Schneider, C. Schanzer, P. Böni, U. Filges, M. Fujita, Y. Nambu, M. Ohkawara, T. Yokoo, S. Itoh

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

2 Scopus citations

Abstract

We report on a wide angle neutron spin analyzer for neutron energies up to 40 meV (λ = 1.4 Å) that was recently realized in collaboration with Tohoku University and KEK, Japan (Ohoyama et al., 2014; Yokoo et al., 2014). Curved polarizing Fe/Si supermirrors with m = 5.5/1.5 (Schanzer et al., 2016) are arranged radially around the sample covering an angular range of 40° if all channels are equipped with supermirrors. The mirrors are saturated by a vertical permanent magnetic field B≃40 mT generated by NdFeB magnets. It was optimized using finite element analysis. The polarization and transmission of the spin filter have been determined at the beamline BOA at the Swiss spallation neutron source (SINQ) to be P=(0.975±0.01) and T_up=T=(0.55±0.017) for spin-up neutrons at λ=3 Å (E=9 meV), respectively. The transmission is excellent considering that approximately one third of the neutrons hit the front faces of the polarizing blades. The experimental results are in good agreement with Monte Carlo simulations using the software package McStas.

Original language	English
Article number	164272
Journal	Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume	976
DOIs	https://doi.org/10.1016/j.nima.2020.164272
State	Published - 1 Oct 2020
Externally published	Yes

Keywords

Neutron scattering
Polarizer
Supermirror
Time-of-flight
Wide angle

Access to Document

10.1016/j.nima.2020.164272

Cite this

Schneider, M., Schanzer, C., Böni, P., Filges, U., Fujita, M., Nambu, Y., Ohkawara, M., Yokoo, T., & Itoh, S. (2020). POLANO: Wide angle spin analysis using polarizing supermirrors m = 5.5. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 976, Article 164272. https://doi.org/10.1016/j.nima.2020.164272

@article{4ee422e2955b4feb9fe9654f6832a055,

title = "POLANO: Wide angle spin analysis using polarizing supermirrors m = 5.5",

abstract = "We report on a wide angle neutron spin analyzer for neutron energies up to 40 meV (λ = 1.4 {\AA}) that was recently realized in collaboration with Tohoku University and KEK, Japan (Ohoyama et al., 2014; Yokoo et al., 2014). Curved polarizing Fe/Si supermirrors with m = 5.5/1.5 (Schanzer et al., 2016) are arranged radially around the sample covering an angular range of 40° if all channels are equipped with supermirrors. The mirrors are saturated by a vertical permanent magnetic field B≃40 mT generated by NdFeB magnets. It was optimized using finite element analysis. The polarization and transmission of the spin filter have been determined at the beamline BOA at the Swiss spallation neutron source (SINQ) to be P=(0.975±0.01) and Tup=T=(0.55±0.017) for spin-up neutrons at λ=3 {\AA} (E=9 meV), respectively. The transmission is excellent considering that approximately one third of the neutrons hit the front faces of the polarizing blades. The experimental results are in good agreement with Monte Carlo simulations using the software package McStas.",

keywords = "Neutron scattering, Polarizer, Supermirror, Time-of-flight, Wide angle",

author = "M. Schneider and C. Schanzer and P. B{\"o}ni and U. Filges and M. Fujita and Y. Nambu and M. Ohkawara and T. Yokoo and S. Itoh",

note = "Publisher Copyright: {\textcopyright} 2020 Elsevier B.V.",

year = "2020",

month = oct,

day = "1",

doi = "10.1016/j.nima.2020.164272",

language = "English",

volume = "976",

journal = "Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment",

issn = "0168-9002",

publisher = "Elsevier B.V.",

}

Schneider, M, Schanzer, C, Böni, P, Filges, U, Fujita, M, Nambu, Y, Ohkawara, M, Yokoo, T & Itoh, S 2020, 'POLANO: Wide angle spin analysis using polarizing supermirrors m = 5.5', Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, vol. 976, 164272. https://doi.org/10.1016/j.nima.2020.164272

TY - JOUR

T1 - POLANO

T2 - Wide angle spin analysis using polarizing supermirrors m = 5.5

AU - Schneider, M.

AU - Schanzer, C.

AU - Böni, P.

AU - Filges, U.

AU - Fujita, M.

AU - Nambu, Y.

AU - Ohkawara, M.

AU - Yokoo, T.

AU - Itoh, S.

PY - 2020/10/1

Y1 - 2020/10/1

N2 - We report on a wide angle neutron spin analyzer for neutron energies up to 40 meV (λ = 1.4 Å) that was recently realized in collaboration with Tohoku University and KEK, Japan (Ohoyama et al., 2014; Yokoo et al., 2014). Curved polarizing Fe/Si supermirrors with m = 5.5/1.5 (Schanzer et al., 2016) are arranged radially around the sample covering an angular range of 40° if all channels are equipped with supermirrors. The mirrors are saturated by a vertical permanent magnetic field B≃40 mT generated by NdFeB magnets. It was optimized using finite element analysis. The polarization and transmission of the spin filter have been determined at the beamline BOA at the Swiss spallation neutron source (SINQ) to be P=(0.975±0.01) and Tup=T=(0.55±0.017) for spin-up neutrons at λ=3 Å (E=9 meV), respectively. The transmission is excellent considering that approximately one third of the neutrons hit the front faces of the polarizing blades. The experimental results are in good agreement with Monte Carlo simulations using the software package McStas.

AB - We report on a wide angle neutron spin analyzer for neutron energies up to 40 meV (λ = 1.4 Å) that was recently realized in collaboration with Tohoku University and KEK, Japan (Ohoyama et al., 2014; Yokoo et al., 2014). Curved polarizing Fe/Si supermirrors with m = 5.5/1.5 (Schanzer et al., 2016) are arranged radially around the sample covering an angular range of 40° if all channels are equipped with supermirrors. The mirrors are saturated by a vertical permanent magnetic field B≃40 mT generated by NdFeB magnets. It was optimized using finite element analysis. The polarization and transmission of the spin filter have been determined at the beamline BOA at the Swiss spallation neutron source (SINQ) to be P=(0.975±0.01) and Tup=T=(0.55±0.017) for spin-up neutrons at λ=3 Å (E=9 meV), respectively. The transmission is excellent considering that approximately one third of the neutrons hit the front faces of the polarizing blades. The experimental results are in good agreement with Monte Carlo simulations using the software package McStas.

KW - Neutron scattering

KW - Polarizer

KW - Supermirror

KW - Time-of-flight

KW - Wide angle

UR - http://www.scopus.com/inward/record.url?scp=85087058684&partnerID=8YFLogxK

U2 - 10.1016/j.nima.2020.164272

DO - 10.1016/j.nima.2020.164272

M3 - Article

AN - SCOPUS:85087058684

SN - 0168-9002

VL - 976

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

M1 - 164272

ER -

POLANO: Wide angle spin analysis using polarizing supermirrors m = 5.5

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this