Focusing and polarized neutron ultra-small-angle scattering spectrometer (SANS-J-II) at Research Reactor JRR3, Japan

• Published in: Physica. B, Condensed matter Vol. 385; pp. 1000 - 1006
• Main Authors: Koizumi, Satoshi, Iwase, Hiroki, Suzuki, Jun-ichi, Oku, Takayuki, Motokawa, Ryuhei, Sasao, Hajime, Tanaka, Hirokazu, Yamaguchi, Daisuke, Shimizu, Hirohiko M., Hashimoto, Takeji
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Amsterdam Elsevier B.V 01.11.2006; Elsevier
• Subjects: Exact sciences and technology; Focusing lens; Neutron physics; Neutron scattering; Nuclear engineering and nuclear power studies; Nuclear physics; Physics; Polarized neutron; Soft matter; Ultra-small-angle scattering; Ultra-small-angle scattering; Soft matter; Polarized neutron; Focusing lens; Small angle neutron scattering; Focusing; Spectrometers; Instrumentation; Incoherent scattering; Dynamic nuclear polarization
• ISSN: 0921-4526; 1873-2135
• DOI: 10.1016/j.physb.2006.05.320

By employing focusing lenses of sextupole permanent magnet and biconcave MgF 2 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 3×10 −3 Å −1 to 3×10 −4 Å −1. Furthermore, we added 3He sub-detectors with an analyzer super mirror at a sample position. With this setup, we perform polarization analysis at high q (>0.2 Å −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 Å −1).