scholarly journals Recent Advances in Small-Angle Neutron Scattering

2021 ◽  
Vol 12 (1) ◽  
pp. 90
Author(s):  
Sebastian Jaksch
Keyword(s):  
Neutron Scattering ◽  
Small Angle ◽  
Small Angle Neutron Scattering ◽  
Small Angle Scattering ◽  
Recent Advances ◽  
Angle Scattering ◽  
Invaluable Tool

Small-angle scattering, and its neutron expression small-angle neutron scattering (SANS), has developed into an invaluable tool for the investigation of microscopic and mesoscopic structures in recent decades [...]

scholarly journals KWS-1: Small-angle scattering diffractometer

2015 ◽  
Vol 1 ◽  
Author(s):  
Henrich Frielinghaus ◽  
Artem Feoktystov ◽  
Ida Berts ◽  
Gaetano Mangiapia
Keyword(s):  
High Resolution ◽  
Neutron Scattering ◽  
Small Angle ◽  
Small Angle Neutron Scattering ◽  
Small Angle Scattering ◽  
Angle Scattering

The KWS-1, which is operated by JCNS, Forschungszentrum Jülich, is a small-angle neutron scattering diffractometer dedicated to high resolution measurements.

A Method for Interpreting Small Angle Neutron Scattering Data from Quasi-Spherical Objects

1994 ◽  
Vol 376 ◽  
Author(s):  
T.M. Sabine ◽  
W.K. Bertram ◽  
L.P. Aldridge
Keyword(s):  
Neutron Scattering ◽  
Multiple Scattering ◽  
Small Angle ◽  
Small Angle Neutron Scattering ◽  
Small Angle Scattering ◽  
Scattering Data ◽  
Type Function ◽  
Scattering Pattern ◽  
Angle Scattering

ABSTRACTSmall angle scattering data are traditionally interpreted in terms of scattering patterns at the Porod and the Guinier limits. It is difficult to fit the entire scattering pattern to account for scattering from spheres because Rayleigh's formula contains oscillatory terms which are smeared out in practice by perturbations in the sizes of the scattering agents.It is proposed that a Lorenztian type function be used instead of Rayleigh's function. By using this equation it is possible to fit the entire small angle scattering pattern and obtain the correct forms of the Guinier and Porod limits.The effects of correlation and multiple scattering are also explored.

scholarly journals Advanced Small-Angle Scattering Instrument Available in the Tokyo Area. Time-Of-Flight, Small-Angle Neutron Scattering Developed on the iMATERIA Diffractometer at the High Intensity Pulsed Neutron Source J-PARC

2020 ◽  
Vol 4 (4) ◽  
pp. 42
Author(s):  
Satoshi Koizumi ◽  
Yohei Noda ◽  
Tomoki Maeda ◽  
Takumi Inada ◽  
Satoru Ueda ◽  
...  
Keyword(s):  
Neutron Scattering ◽  
Small Angle ◽  
High Intensity ◽  
Small Angle Neutron Scattering ◽  
Time Of Flight ◽  
Small Angle Scattering ◽  
Proton Accelerator ◽  
Static Structure Factor ◽  
Angle Scattering ◽  
Pulsed Neutron

A method of time-of-flight, small-angle neutron scattering (TOF-SANS) has been developed based on the iMATERIA powder diffractometer at BL20, of the Materials and Life Sciences Facility (MLF) at the high-intensity proton accelerator (J-PARC). A large-area detector for SANS, which is composed of triple-layered 3He tube detectors, has a hole at its center in order to release a direct beam behind and to detect ultra-small-angle scattering. As a result, the pulsed-neutron TOF method enables us to perform multiscale observations covering 0.003 < q (Å−1) < 40 (qmax/qmix = 1.3 × 104) and to determine the static structure factor S(q) and/or form factor P(q) under real-time and in-situ conditions. Our challenge, using unique sample accessories of a super-conducting magnet and polarized neutron, is dynamic nuclear polarization (DNP) for contrast variation, especially for industrial use. To reinforce conventional SANS measurements with powder materials, grazing-incidence small-angle neutron scattering (GISANS) or reflectivity is also available on the iMATERIA instrument.

Multi-tube area detector developed for reactor small-angle neutron scattering spectrometer SANS-J-II

2016 ◽  
Vol 49 (1) ◽  
pp. 128-138 ◽  
Author(s):  
Y. Noda ◽  
S. Koizumi ◽  
D. Yamaguchi
Keyword(s):  
Data Acquisition ◽  
Neutron Scattering ◽  
Small Angle ◽  
Small Angle Neutron Scattering ◽  
Small Angle Scattering ◽  
Proton Accelerator ◽  
Large Area ◽  
Counting Loss ◽  
Area Detector ◽  
Angle Scattering

A newly developed multi-tube area detector for a small-angle neutron scattering (SANS) spectrometer (SANS-J-II) at the research reactor JRR-3 in Tokai, Japan, has been implementedviathe use of one-dimensional position-sensitive3He detectors (tubes). Ninety-six active tubes of 8 mm in diameter and 650 and 580 mm in length were filled with 15 atm (1.52 MPa) of3He and aligned vertically parallel in order to cover a sufficiently large area for small-angle scattering measurement. These tubes are enclosed in an air chamber together with neutron encode and GATENET modules (VME boards), which compose a standard data acquisition system for the spallation neutron source of the Japan Proton Accelerator Research Complex. This system facilitates the acquisition of time-of-flight neutron event data. The multi-tube detector is mounted on a truck moving in a vacuum chamber of the SANS spectrometer. After discriminating noise originating from γ-rays, and calibrating the positions and sensitivities of individual tubes, the resolution was determined (i.e.channel widths along parallel and vertical directions along a tube). The counting rate of one tube was determined to be 1.4 × 103counts per second with a counting loss of 1%. This implies that the new detector, composed of 96 tubes, can detect more than 105neutrons per second with a counting loss of 1%. To demonstrate its use, small-angle scattering originating from a diblock copolymer film with a highly oriented lamellar microdomain was observed. The data acquisition in event mode has a great advantage in time-resolved measurements that are synchronized with external stimuli imposed on a sample.

scholarly journals SANS-1: Small angle neutron scattering

2015 ◽  
Vol 1 ◽  
Author(s):  
André Heinemann ◽  
Sebastian Mühlbauer
Keyword(s):  
Neutron Scattering ◽  
Small Angle ◽  
Small Angle Neutron Scattering ◽  
Small Angle Scattering ◽  
Neutron Guide ◽  
Regular User ◽  
Angle Scattering

The new small angle scattering instrument SANS-1, jointly operated by the Technische Universität München and GEMS, Helmholtz-Zentrum Geesthacht, has completed commissioning and is in regular user service (Gilles et al., 2006). SANS-1 is located at the end of neutron guide NL4a in the Neutron Guide Hall West.

Ultra small Angle Neutron Scattering from Amorphous Ni-Pd-P-Alloys

1993 ◽  
Vol 48 (12) ◽  
pp. 1203-1206
Author(s):  
R. M. Hagenmayer ◽  
C. M. E. Zeyen ◽  
P. Lamparter ◽  
S. Steeb
Keyword(s):  
Neutron Scattering ◽  
Small Angle ◽  
Small Angle Neutron Scattering ◽  
Small Angle Scattering ◽  
Surface Scattering ◽  
Immersion Method ◽  
Crystal Spectrometer ◽  
Double Crystal ◽  
Angle Scattering ◽  
Q Values

Abstract Using a neutron double crystal spectrometer, thin amorphous Ni-Pd-P-samples were investi-gated at very small Q-values (10-5 Å -1 ≦Q≦10 -3 Å -1). The immersion method shows that the small angle scattering effect is mainly caused by surface scattering.

Theory, practice and prospects of X-ray and neutron scattering for lignocellulosic biomass characterization: towards understanding biomass pretreatment

2015 ◽  
Vol 8 (2) ◽  
pp. 436-455 ◽  
Author(s):  
Gang Cheng ◽  
Xin Zhang ◽  
Blake Simmons ◽  
Seema Singh
Keyword(s):  
Neutron Scattering ◽  
Detailed Analysis ◽  
Lignocellulosic Biomass ◽  
Small Angle ◽  
Small Angle Scattering ◽  
Biomass Pretreatment ◽  
Biomass Recalcitrance ◽  
X Ray ◽  
Angle Scattering ◽  
Biomass Characterization

We present a detailed analysis of application of wide and small angle scattering techniques to study the structures of cellulose and lignin which are relevant to biomass recalcitrance.

Messung kohärenter Streulängen mit Christiansen-Filtern für Neutronenstrahlung

1971 ◽  
Vol 26 (3) ◽  
pp. 391-399 ◽  
Author(s):  
L. Koester ◽  
K. Knopf
Keyword(s):  
Scattering Amplitudes ◽  
Neutron Scattering ◽  
Small Angle ◽  
High Accuracy ◽  
Small Angle Scattering ◽  
Filter Technique ◽  
Angle Scattering ◽  
Theory And Experiment ◽  
Good Agreement

Abstract Measurements of Neutron-Scattering-Amplitudes using the Christiansen-Filter- Technique By means of Christiansen-Filters it is possible to make use of the high accuracy achieved for the scattering amplitudes of liquids also for solids in form of powders. We investigated the scattering law for the small angle scattering of Neutrons by Christiansen-Filters and found a good agreement between theory and experiment. Using powders of several elements we could measure the scattering amplitudes of the elements with an uncertainty within ± 0.2% to ± 1%. We got for the bound atoms of Al: a = (3.449±0.009) F; Nb: a = (7.11 ± 0.04 ) F;Cr: a = (3.532 ± 0.010) F; Te: a= (5.43 ± 0.04 ) F;Sb: a = (5.641 ± 0.012) F; and Ta: a = (6.91 ± 0.07) F. Si: a = (4.159±0.006) F;

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