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首页> 外文期刊>Physica, B. Condensed Matter >Focusing and polarized neutron ultra-small-angle scattering spectrometer (SANS-J-II) at Research Reactor JRR3, Japan
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Focusing and polarized neutron ultra-small-angle scattering spectrometer (SANS-J-II) at Research Reactor JRR3, Japan

机译:日本研究堆JRR3的聚焦和极化中子超小角散射光谱仪(SANS-J-II)

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摘要

By employing focusing lenses of sextupole permanent magnet and biconcave MgF2 crystal, and high-resolution photomultiplier, SANS-J (pinhole small-angle neutron scattering spectrometer at research reactor JRR3, Tokai) was reconstructed to focusing and polarized neutron ultra-small-angle scattering spectrometer (SANS-J-II). Consequently, an accessible minimum wave number q(min) was improved from 3 x 10(-3) angstrom(-1) to 3 x 10(-4) angstrom(-1). Furthermore, we added He-3 sub-detectors with an analyzer super mirror at a sample position. With this setup, we perform polarization analysis at high q (> U angstrom(-1)) in order to quantitatively discriminate spin incoherent scattering from hydrogen or to perform spin contrast variation, by a dynamic nuclear polarization method (> 0.2 angstrom(-1)) (c) 2006 Elsevier B.V. All rights reserved.
机译:通过使用六极永磁体和双凹MgF2晶体的聚焦透镜以及高分辨率光电倍增管,重建了SANS-J(东海研究堆JRR3上的针孔小角中子散射光谱仪)以聚焦和极化中子超小角散射。光谱仪(SANS-J-II)。因此,可访问的最小波数q(min)从3 x 10(-3)埃(-1)提高到3 x 10(-4)埃(-1)。此外,我们在样品位置添加了He-3子探测器和分析仪超级镜。通过此设置,我们通过动态核极化方法(> 0.2埃(-1),对高q(> U埃(-1))进行极化分析,以便定量地分辨出自旋氢的自旋非相干散射或执行自旋对比度变化))(c)2006 Elsevier BV保留所有权利。

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