scholarly journals Two-dimensional position-sensitive detectors for small-angle neutron scattering

1990 ◽  
Author(s):  
S. A. McElhaney ◽  
R. I. Vandermolen
Keyword(s):  
Neutron Scattering ◽  
Small Angle ◽  
Small Angle Neutron Scattering ◽  
Two Dimensional ◽  
Position Sensitive ◽  
Position Sensitive Detectors

An imaging-plate detector for small-angle neutron scattering

2000 ◽  
Vol 33 (5) ◽  
pp. 1253-1261 ◽  
Author(s):  
Y. T. Cheng ◽  
D. F. R. Mildner ◽  
H. H. Chen-Mayer ◽  
V. A. Sharov ◽  
C. J. Glinka
Keyword(s):  
Neutron Scattering ◽  
Small Angle ◽  
Small Angle Neutron Scattering ◽  
Imaging Techniques ◽  
Neutron Imaging ◽  
Small Samples ◽  
Imaging Plate ◽  
Position Sensitive ◽  
Transfer Method ◽  
Imaging Plates

Small-angle neutron scattering (SANS) measurements have been performed on long-flight-path pinhole-collimation SANS instruments using, as a two-dimensional position-sensitive detector, both a neutron imaging plate, incorporating gadolinium, and a two-step transfer method, with dysprosium foil as the image transfer medium. The measurements are compared with corresponding data taken using conventional position-sensitive gas proportional counters on the SANS instruments in order to assess the viability of the imaging techniques. The imaging plates have pixel sizes of about two orders of magnitude smaller than those of the gas proportional counter. The reduced pixel size provides definite advantages over the gas counter in certain specific situations, namely when limited space necessitates a short sample-to-detector distance, when only small samples (comparable in size to the detector pixels) are available, or when used in conjunction with focusing beam optics.

Neutron scattering studies of biological macromolecules in solution

1977 ◽  
Vol 10 (4) ◽  
pp. 485-527 ◽  
Author(s):  
G. G. Kneale ◽  
J. P. Baldwin ◽  
E. M. Bradbury
Keyword(s):  
Neutron Scattering ◽  
Small Angle ◽  
Structural Information ◽  
Biological Macromolecules ◽  
X Rays ◽  
X Ray Scattering ◽  
Time Position ◽  
Position Sensitive ◽  
Biological Complexes ◽  
Position Sensitive Detectors

Small-angle neutron scattering studies of biological macromolecules have developed rapidly in recent years due to the advent of high neutron-flux reactors,† efficient position-sensitive area detectors for neutrons (Allemand et al. 1975) and novel design of instruments (Ibel, 1976). At the same time position-sensitive detectors for X-rays (Gabriel & Dupont, 1972) have revitalized the small-angle X-ray scattering field (Kratky & Pilz, 1972; Luzzati et al. 1976) and it is now becoming clear that neutrons and X-rays can provide complementary structural information on biological complexes.

The small-angle neutron scattering spectrometer at the University of Missouri research reactor

1981 ◽  
Vol 14 (6) ◽  
pp. 370-382 ◽  
Author(s):  
D. F. R. Mildner ◽  
R. Berliner ◽  
O. A. Pringle ◽  
J. S. King
Keyword(s):  
Neutron Scattering ◽  
Small Angle ◽  
Small Angle Neutron Scattering ◽  
Research Reactor ◽  
Pyrolytic Graphite ◽  
Flight Path ◽  
University Of Missouri ◽  
Beam Incident ◽  
Position Sensitive ◽  
The University

A small-angle neutron scattering (SANS) spectrometer has been constructed at the University of Missouri Research Reactor Facility (MURR). The design of the MURR–SANS is unusual in that the size of the reactor containment building constrains the flight path to be vertical. This is achieved by Bragg scattering upward through 90° from a set of slightly misaligned pyrolytic graphite crystals to provide a neutron beam at 4.75 Å with a wavelength spread of approximately 4.1%. The beam incident on the sample is defined by two matched variable apertures located either 3.0 or 4.5 m apart. The evacuated scattered flight path is designed with removable extensions to match the primary flight path in length. The instrument has an automatic sample handling capability provided by its own dedicated PDP 11/03 computer. The detector is a large assembly of commercially available linear 3He detectors as an economic alternative to a crossed-wire two-dimensional multi-detector. An array of 43 position-sensitive proportional counters, 24 in (609.6 mm) long and 0.5 in (12.7 mm) in diameter, using charge division gives a spatial resolution of 5 x 12.7 mm. The area-averaged detector efficiency is about 84% at a wavelength of 4.75 Å. The range of scattering vectors that can be measured is 0.005 < Q< 0.15 Å−1. The instrument is well suited to a wide variety of experiments on specimens having characteristic dimensions between 20 and 500 Å. MURR–SANS is designed as a user-oriented facility which provides both reasonable resolution and intensity on sample at a modest cost, and forms part of a neutron scattering center.

scholarly journals A new two-dimensional scintillation detector system for small-angle neutron scattering experiments

2001 ◽  
Vol 48 (4) ◽  
pp. 1114-1117 ◽  
Author(s):  
G. Kemmerling ◽  
R. Engels ◽  
N. Bussmann ◽  
U. Clemens ◽  
M. Heiderich ◽  
...  
Keyword(s):  
Neutron Scattering ◽  
Small Angle ◽  
Scintillation Detector ◽  
Small Angle Neutron Scattering ◽  
Detector System ◽  
Two Dimensional

scholarly journals Primary Data Treatment Software for Position-Sensitive Detector of Small-Angle Neutron Scattering Spectrometer in the Isotropic Pattern Scattering Case

2018 ◽  
Vol 173 ◽  
pp. 05015
Author(s):  
Alexei Soloviev ◽  
Sergei Kutuzov ◽  
Olexander Ivankov ◽  
Alexander Kuklin
Keyword(s):  
Data Processing ◽  
Neutron Scattering ◽  
Small Angle ◽  
Small Angle Neutron Scattering ◽  
Position Sensitive Detector ◽  
Primary Data ◽  
Sensitive Detector ◽  
Data Converter ◽  
Processing Program ◽  
Position Sensitive

A new data converter has been created for the new position-sensitive detector (PSD) of small-angle neutron scattering (SANS) spectrometer YuMO. In the isotropic pattern scattering case, it provides the possibility for processing PSD data with the SAS data processing program that has already been in use.

Optimization of the thickness of a ZnS/6LiF scintillator for a high-resolution detector installed on a focusing small-angle neutron scattering spectrometer (SANS-U)

2012 ◽  
Vol 45 (3) ◽  
pp. 507-512 ◽  
Author(s):  
Hiroki Iwase ◽  
Masaki Katagiri ◽  
Mitsuhiro Shibayama
Keyword(s):  
High Resolution ◽  
Neutron Scattering ◽  
Small Angle ◽  
Small Angle Neutron Scattering ◽  
Detection Efficiency ◽  
Pulse Height ◽  
Atomic Energy ◽  
Japan Atomic Energy Agency ◽  
Energy Agency ◽  
Position Sensitive

This study involves the upgrade of a high-resolution position-sensitive detector (HR-PSD) installed on the small-angle neutron scattering spectrometer (SANS-U) at the Japan Atomic Energy Agency. By using both neutron lenses and the HR-PSD, the accessible low-Qlimit can be extended to the order of 10−4 Å−1[Qis the magnitude of the scattering vector defined byQ= (4π/λ)sinθ, where λ and 2θ are the wavelength and the scattering angle, respectively]. The HR-PSD consists of a cross-wired position-sensitive photomultiplier tube (PSPMT) and a commercial ZnS/6LiF scintillator. To improve the experimental efficiency of focusing small-angle neutron scattering (FSANS) experiments, a high-performance ZnS/6LiF scintillator developed at the Japan Atomic Energy Agency has been utilized. For the PSPMT and data-acquisition system installed on SANS-U, the thickness of the ZnS/6LiF scintillator was optimized by measuring the thickness dependence of the pulse-height spectra. Under the experimental conditions of SANS-U, the optimum thickness of the ZnS/6LiF scintillator (ZnS:6LiF = 2:1) was determined to be 0.433 mm by measuring the total counts and peak positions of the pulse-height spectra. Installation of the optimized ZnS/6LiF scintillator improved detection efficiency by 1.39 times over that of a commercial scintillator at the same level of background counts andQresolution in FSANS experiments.

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