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The Large-Area Detector for Small-Angle Neutron Scattering on iMATERIA at J-PARC
Article

First Experiment of Spin Contrast Variation Small-Angle Neutron Scattering on the iMATERIA Instrument at J-PARC

1
Institute of Quantum Beam Science, Ibaraki University, 162-1 Shirakata, Tokaimura, Nakagun, Ibaraki 319-1106, Japan
2
J-PARC Center, Japan Atomic Energy Agency, 2-4 Shirakata, Tokaimura, Nakagun, Ibaraki 319-1106, Japan
3
Sumitomo Rubber Industries, Ltd., 1-1-2 Tsutsuicho, Chuoku, Kobe 651-0071, Japan
*
Authors to whom correspondence should be addressed.
Quantum Beam Sci. 2020, 4(4), 33; https://0-doi-org.brum.beds.ac.uk/10.3390/qubs4040033
Received: 31 July 2020 / Revised: 23 September 2020 / Accepted: 24 September 2020 / Published: 25 September 2020
(This article belongs to the Special Issue New Trends in Neutron Instrumentation)
Recently, we have developed a novel dynamic nuclear polarization (DNP) apparatus with a magnetic field of 7 T and a sample temperature of 1 K. High proton spin polarizations from −84% to 76%, for TEMPO doped polystyrene samples, have been demonstrated. This DNP apparatus satisfies the simultaneous requirement for quick and easy sample exchange and high DNP performance. On the iMATERIA (BL20) instrument at J-PARC, the first beam experiment using this DNP apparatus has been performed. For this experiment, the beamline was equipped with a supermirror polarizer. The stray magnetic field due to the superconducting magnet for DNP was also evaluated. The stray magnetic field plays an important role for in maintaining the neutron polarization during the transportation from the polarizer to the sample. The small-angle neutron scattering (SANS) profiles of silica-filled rubber under dynamically polarized conditions are presented. By applying our new analytical approach for SANS coherent scattering intensity, neutron polarization (PN) as a function of neutron wavelength was determined. Consequently, for the neutron wavelength, range from 4 Å to 10 Å, |PN| was sufficient for DNP-SANS studies. View Full-Text
Keywords: small-angle neutron scattering; contrast variation; dynamic nuclear polarization; J-PARC small-angle neutron scattering; contrast variation; dynamic nuclear polarization; J-PARC
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MDPI and ACS Style

Noda, Y.; Maeda, T.; Oku, T.; Koizumi, S.; Masui, T.; Kishimoto, H. First Experiment of Spin Contrast Variation Small-Angle Neutron Scattering on the iMATERIA Instrument at J-PARC. Quantum Beam Sci. 2020, 4, 33. https://0-doi-org.brum.beds.ac.uk/10.3390/qubs4040033

AMA Style

Noda Y, Maeda T, Oku T, Koizumi S, Masui T, Kishimoto H. First Experiment of Spin Contrast Variation Small-Angle Neutron Scattering on the iMATERIA Instrument at J-PARC. Quantum Beam Science. 2020; 4(4):33. https://0-doi-org.brum.beds.ac.uk/10.3390/qubs4040033

Chicago/Turabian Style

Noda, Yohei, Tomoki Maeda, Takayuki Oku, Satoshi Koizumi, Tomomi Masui, and Hiroyuki Kishimoto. 2020. "First Experiment of Spin Contrast Variation Small-Angle Neutron Scattering on the iMATERIA Instrument at J-PARC" Quantum Beam Science 4, no. 4: 33. https://0-doi-org.brum.beds.ac.uk/10.3390/qubs4040033

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