A neutron imaging device for sample alignment in a pulsed neutron scattering instrument

2009 ◽  
Vol 80 (9) ◽  
pp. 093704 ◽  
Author(s):  
F. Grazzi ◽  
A. Scherillo ◽  
M. Zoppi
Keyword(s):  
Neutron Scattering ◽  
Neutron Imaging ◽  
Imaging Device ◽  
Sample Alignment ◽  
Pulsed Neutron

Local atomic structure of relaxor ferroelectric solids studied by pulsed neutron scattering

1994 ◽  
Vol 52 ◽  
pp. 554-555
Author(s):  
T. Egami ◽  
H. D. Rosenfeld ◽  
S. Teslic
Keyword(s):  
Neutron Scattering ◽  
Atomic Structure ◽  
Argonne National Laboratory ◽  
Relaxor Ferroelectrics ◽  
Relaxor Ferroelectric ◽  
Crystallographic Structure ◽  
Chemical Inhomogeneity ◽  
Distribution Analysis ◽  
Ferroelectric Transition ◽  
Pulsed Neutron

Relaxor ferroelectrics, such as Pb(Mg1/3Nb2/3)O3 (PMN) or (Pb·88La ·12)(Zr·65Ti·35)O3 (PLZT), show diffuse ferroelectric transition which depends upon frequency of the a.c. field. In spite of their wide use in various applications details of their atomic structure and the mechanism of relaxor ferroelectric transition are not sufficiently understood. While their crystallographic structure is cubic perovskite, ABO3, their thermal factors (apparent amplitude of thermal vibration) is quite large, suggesting local displacive disorder due to heterovalent ion mixing. Electron microscopy suggests nano-scale structural as well as chemical inhomogeneity.We have studied the atomic structure of these solids by pulsed neutron scattering using the atomic pair-distribution analysis. The measurements were made at the Intense Pulsed Neutron Source (IPNS) of Argonne National Laboratory. Pulsed neutrons are produced by a pulsed proton beam accelerated to 750 MeV hitting a uranium target at a rate of 30 Hz. Even after moderation by a liquid methane moderator high flux of epithermal neutrons with energies ranging up to few eV’s remain.

Pulsed neutron scattering on molten Bi + BiI3 mixtures

1981 ◽  
Vol 83 (1) ◽  
pp. 35-38 ◽  
Author(s):  
Kazuhiko Ichikawa ◽  
Takaaki Matsumoto
Keyword(s):  
Neutron Scattering ◽  
Pulsed Neutron

scholarly journals Present Status of Research on Pulsed Neutron Imaging in Japan

2013 ◽  
Vol 43 ◽  
pp. 92-99 ◽  
Author(s):  
Y. Kiyanagi ◽  
T. Shinohara ◽  
T. Kai ◽  
T. Kamiyama ◽  
H. Sato ◽  
...  
Keyword(s):  
Present Status ◽  
Neutron Imaging ◽  
Pulsed Neutron

Comparison of Small-Angle Neutron Scattering of δ' Precipitation in an Al–Li Alloy at a High-Flux Reactor and at a Pulsed-Neutron Source

1997 ◽  
Vol 30 (5) ◽  
pp. 602-606 ◽  
Author(s):  
G. Albertini ◽  
F. Carsughi ◽  
R. Coppola ◽  
R. K. Heenan ◽  
M. Stefanon
Keyword(s):  
Neutron Scattering ◽  
Small Angle ◽  
Small Angle Neutron Scattering ◽  
Size Distribution Function ◽  
Data Sets ◽  
Flux Reactor ◽  
Average Size ◽  
Pulsed Neutron ◽  
Pulsed Neutron Source ◽  
Good Agreement

Two different small-angle neutron scattering (SANS) facilities, the D11 camera at the Institut Laue–Langevin (ILL, Grenoble, France) and the LOQ time-of-flight diffractometer at the Rutherford Appleton Laboratory (RAL, Didcot, Oxon, England), were used in the investigations of δ′-Al3Li precipitation at 463 K in Al–Li 3% alloy. The results obtained from the steady-state reactor and from the pulsed source by using two different data-acquisition techniques and two different procedures for data analysis are compared. The SANS curves for the same set of samples investigated using the two different instruments are in good agreement within the experimental uncertainties. A check was also made on the metallurgically relevant quantities, namely the average size and the size-distribution function of the δ′ precipitates at the various stages of the ageing process, obtained from the two sets of SANS curves by applying the same numerical method. Good agreement was found between the results from the two data sets.

scholarly journals Recent progress of pulsed neutron imaging in Japan

2012 ◽  
Vol 26 ◽  
pp. 219-222 ◽  
Author(s):  
Yoshikai Kiyanagi ◽  
Hirotaka Sato ◽  
Kenji Iwase ◽  
Takashi Kamiyama
Keyword(s):  
Recent Progress ◽  
Neutron Imaging ◽  
Pulsed Neutron

Energy-resolved neutron imaging options at a small angle neutron scattering instrument at the Australian Center for Neutron Scattering

2019 ◽  
Vol 90 (3) ◽  
pp. 035114 ◽  
Author(s):  
A. S. Tremsin ◽  
A. V. Sokolova ◽  
F. Salvemini ◽  
V. Luzin ◽  
A. Paradowska ◽  
...  
Keyword(s):  
Neutron Scattering ◽  
Small Angle ◽  
Small Angle Neutron Scattering ◽  
Neutron Imaging

Neutron imaging with bent perfect crystals. I. Imaging conditions

2001 ◽  
Vol 34 (3) ◽  
pp. 343-357 ◽  
Author(s):  
A. D. Stoica ◽  
M. Popovici ◽  
C. R. Hubbard
Keyword(s):  
High Resolution ◽  
Neutron Scattering ◽  
Spatial Resolution ◽  
Neutron Imaging ◽  
Matrix Formalism ◽  
Neutron Optics ◽  
Bent Crystals ◽  
Time Of Flight Method ◽  
Imaging Conditions ◽  
Lens Optics

Neutron imaging with bent crystals is considered in the linear approximation of neutron optics. A matrix formalism analogous to that of conventional lens optics is developed. Various imaging conditions are discussed in relation to the crystal deformation type and to possible applications in neutron scattering. All focusing conditions known previously are included as particular cases. Arrangements combining high resolution in imaging with high resolution in scattering are examined. The concept of Bragg mirrors as devices for non-dispersive imaging is introduced. The most powerful application appears to be that of Bragg mirrors combined with the time-of-flight method. Imaging with a thick packet of silicon wafers at the spatial resolution of a single thin wafer is demonstrated.

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