Focusing and polarized neutron small-angle scattering spectrometer (SANS-J-II). The challenge of observation over length scales from an ångström to a micrometre

Koizumi, Satoshi; Iwase, Hiroki; Suzuki, Jun–ichi; Oku, Takayuki; Motokawa, Ryuhei; Sasao, H.; Tanaka, Hirokazu; Yamaguchi, Daisuke; Shimizu, Hirohiko M.; Hashimoto, Takeji

doi:10.1107/s0021889807014392

Cited by 99 publications

(72 citation statements)

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“…Une autre consiste en une série de lentilles biconcaves convergentes en MgF 2 placées juste avant l'échantillon et permet d'obtenir un gain en flux d'un ordre de grandeur [44,45]. Des lentilles magnétiques ont également été mises en place sur SANS-J au Japon [46]. Ces dispositifs permettent un gain de flux, une meilleure résolution et un plus petit q min mais aux dépends de la flexibilité de l'instrument qui n'est alors optimisé que pour une longueur d'onde ou une distanceéchantillon détecteur [47].…”

Section: De Nouveaux Instruments Pour La Matière Molleunclassified

Albe 1998 – La grande Motte 2009 : quelles avancées en 10 ans ?

Grillo

2010

Journées de la Neutronique

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Abstract. The importance of neutron scattering techniques for the characterization of samples in soft condensed matter has been demonstrated all along the present book. The fine understanding of the physical properties is closely linked to progress in the field of instrumentation. This chapter describes the advances over the last decade in technical domains, such as neutron detection, electronics and sample environment. The news software for data reduction and analysis are also discussed before to conclude with the ILL and LLB projects for new instruments.Résumé. Tout au long de ce livre, nous avons vu l'importance des techniques de diffusion de neutrons pour la caractérisation des échantillons en matière molle. La compréhension toujours plus détaillée de la physique des échantillons est intimement liée aux progrès instrumentaux. Ce chapitre présente les avancées et les développements réalisés pendant ces dix dernières années dans les domaines techniques, comme ceux de la détection, de l'électronique et des environnements échantillons. Les nouveaux moyens de traitement et d'analyse des données sont ensuite présentés. Nous terminons par les projets instrumentaux de l'ILL et du LLB.Depuis 30 ans, les techniques de diffusion, en particulier la DNPA et plus récemment la réflectométrie ont indiscutablement contribué aux avancées des recherches dans le domaine de la matière molle. Toujours extrêmement demandées (il y a en moyenne un facteur 3 à 4 entre le nombre de jours souhaité et celui attribué dans les comités de sélection), ces expériences peuvent apparaître comme « routinières ». Pourtant, elles sont de plus en plus pointues et permettent des représentations et des compréhensions des systèmes expérimentaux de plus en plus précises. On observe ainsi une évolution parallèle de la complexité des techniques mises en oeuvre et de celle des systèmes étudiés. Nous essayerons de mettre en évidence dans ce chapitre les progrès les plus marquants de ces 10 dernières années.

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Section: De Nouveaux Instruments Pour La Matière Molleunclassified

Albe 1998 – La grande Motte 2009 : quelles avancées en 10 ans ?

Grillo

2010

Journées de la Neutronique

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“…Then another neutron focusing device, the MgF 2 biconcave compound refractive lenses, which focus the neutrons irrespective of the neutron spin polarity, was also installed at SANS-J-II (Fig. 3) (Koizumi et al, 2007). The intensity distribution of the focused neutron beam was measured by using a photomultiplier-based scintillation two-dimensional detector (PSD) with position resolution of 0.7 mm for the FWHM (Hirota et al, 2005).…”

Section: Methodsmentioning

confidence: 99%

“…The compound refractive lenses are biconcave-shaped singlecrystal MgF 2 lenses whose diameter, curvature radius, and center thickness are 30, 25 and 1 mm, respectively (Koizumi et al, 2007). 70 pieces of the compound refractive lenses were arranged so as to have nearly the same focal condition as the magnetic neutron lens.…”

Section: à2mentioning

confidence: 99%

“…In this study, we investigated the performance of the neutron focusing setup using the magnetic neutron lens of SANS-J-II, and we discuss the ability of the FSANS instrument. The performance of the focusing setup using the compound refractive lenses is reported by S. Koizumi et al together with the system and components of SANS-J-II, such as optical devices, detectors and their driving devices (Koizumi et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

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A focusing-geometry small-angle neutron scattering instrument with a magnetic neutron lens

Oku¹,

Iwase²,

Shinohara³

et al. 2007

J Appl Cryst

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We have constructed a focusing-geometry small-angle neutron scattering (FSANS) instrument, SANS-J-II, with two kinds of neutron focusing device: a series of compound refractive lenses made of MgF 2 and a magnetic neutron lens based on an extended Halbach-type sextupole magnet. In this study, we investigated the performance of the FSANS instrument with the magnetic neutron lens. The intensity distribution of a direct neutron beam focused on the detector plane by the magnetic neutron lens had a ratio of the peak height to the background level of $ 6 Â 10 4 for a polarized neutron beam with a polarization degree of $ 0:99. It is found that a minimum value of the measurable q range [where q is the modulus of the scattering vector and is defined as q ¼ ð4=Þ sinð=2Þ, where is the scattering angle and is the neutron wavelength], q min , of 6:5 Â 10 À4 Å À1 can be achieved by the FSANS instrument with the magnetic neutron lens using neutrons with ¼ 6:6 Å and Á= ¼ 0:13 for the full width at half maximum.

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“…27 Figure 4 shows a schematic picture of focusing SANS at SANS-J-II, JRR-3, Tokai, Japan. 28,29 A high-resolution area detector with 0.5 mm positional resolution was installed in addition to a MgF 2 lens resulting in a value of q min D3 Â 0 À3 nm À1 is attained; in contrast, the q min of pinhole SANS is 3 Â 10 À3 nm À1 . Although the q min of focusing SANS is larger than that of USANS, we can obtain 2D scattering patterns and measure anisotropic structures, such as the scattering pattern of rubber-filler systems under extension.…”

Section: Scattering Studies Of Rubber-filler Systems M Takenakamentioning

confidence: 99%

Analysis of structures of rubber-filler systems with combined scattering methods

Takenaka

2012

Polym J

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This review presents an analysis of the hierarchical structures formed in rubber-filler systems by using combined scattering methods. The combined scattering methods utilize various scattering methods and are powerful tools for the quantitative characterization of hierarchical structures over a wide range of length scales, ranging from nanometers to micrometers. Scattering theories for the analysis of the experimental scattering functions and their applications are described. Polymer Journal (2013) 45, 10-19; doi:10.1038/pj.2012.187; published online 21 November 2012Keywords: combined scattering methods; hierarchical structure; rubber-filler systems INTRODUCTION Rubber-filler systems have been widely used in industrial applications, such as for tires and belts so on. 1-6 The use of fillers in rubber compounds reinforces the rubber material and improves the barrier properties. There are several important factors for controlling the efficiency of rubber reinforcement by fillers. The dispersion of filler particles in the rubber matrix is one of the most important factors in this process. Typically, following the use of conventional compounding processes, the fillers are not dispersed homogeneously and form hierarchical structures within the rubber matrices. For example, in rubber-carbon black (CB) systems, the CB primary particles are not distributed independently but coalesce into aggregates, which are indestructible units of CB, during conventional compounding processes. 2 The aggregates of CB, which are called aggregates or agglomerates, can also lead to the formation of hierarchical structures, which consist of higher levels of ordered structure. 2 It is believed that the hierarchical structures affect the efficiency of filler reinforcement. Other rubber-filler systems also form hierarchical structures; furthermore, the characteristic lengths and morphologies of each level of ordered structure, such as agglomerates, vary with the specific combination of rubber and filler used in the system in addition to the compounding processes. To analyze the hierarchical structure, scattering techniques are one of useful techniques. In scattering experiments, we investigated the angular dependence of the scattered intensities induced by the incident beam hitting samples. Although the interpretation of the scattering intensities is complicated, nonetheless, scattering techniques are suitable for obtaining the statistical features of rubber-filler systems. However, the length scales of the hierarchical structures can extend from nanometers to micrometers, which prevents the characterization

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Focusing and polarized neutron small-angle scattering spectrometer (SANS-J-II). The challenge of observation over length scales from an ångström to a micrometre

Cited by 99 publications

References 13 publications

Albe 1998 – La grande Motte 2009 : quelles avancées en 10 ans ?

Albe 1998 – La grande Motte 2009 : quelles avancées en 10 ans ?

A focusing-geometry small-angle neutron scattering instrument with a magnetic neutron lens

Analysis of structures of rubber-filler systems with combined scattering methods

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