Bent crystals as high-reflectivity components for a Laue lens: basic concepts and experimental techniques

2012 ◽  
Author(s):  
Vincenzo Guidi ◽  
Riccardo Camattari ◽  
Ilaria Neri ◽  
Luca Lanzoni
Keyword(s):  
Experimental Techniques ◽  
High Reflectivity ◽  
Laue Lens ◽  
Basic Concepts ◽  
Bent Crystals

Bent crystals by surface grooving method for high-efficiency concentration of hard x-ray photons by a Laue lens

2011 ◽  
Author(s):  
V. Guidi ◽  
N. Barrière ◽  
V. Bellucci ◽  
R. Camattari ◽  
I. Neri
Keyword(s):  
High Efficiency ◽  
X Ray ◽  
Laue Lens ◽  
Bent Crystals

scholarly journals Expected performances of a Laue lens made with bent crystals

2017 ◽  
Vol 3 (04) ◽  
pp. 1 ◽  
Author(s):  
Enrico Virgilli ◽  
Vineeth Valsan ◽  
Filippo Frontera ◽  
Ezio Caroli ◽  
Vincenzo Liccardo ◽  
...  
Keyword(s):  
Laue Lens ◽  
Bent Crystals

Superparamagnetism and Other Magnetic Features in Granular Materials: A Review on Ideal and Real Systems

2008 ◽  
Vol 8 (6) ◽  
pp. 2836-2857 ◽  
Author(s):  
M. Knobel ◽  
W. C. Nunes ◽  
L. M. Socolovsky ◽  
E. De Biasi ◽  
J. M. Vargas ◽  
...  
Keyword(s):  
Granular Materials ◽  
Magnetic Materials ◽  
Structural Disorder ◽  
Magnetic Interactions ◽  
Experimental Techniques ◽  
Grain Sizes ◽  
Magnetic Features ◽  
Basic Concepts ◽  
Basic Features

An overview on magnetic of nanostructured magnetic materials is presented, with particular emphasis on the basic features displayed by granular nanomagnetic solids. Besides a review of the basic concepts and experimental techniques, the role of structural disorder (mainly the distribution of grain sizes), interparticle magnetic interactions and surface effects are also discussed with some detail. Recent results, models and trends on the area are also discussed.

Neutron microfocusing with bent crystals

1994 ◽  
Vol 209 (8) ◽  
Author(s):  
M. Popovici ◽  
W. B. Yelon
Keyword(s):  
Full Advantage ◽  
Previous Analysis ◽  
Limited Range ◽  
Numerical Computations ◽  
Plastic Bending ◽  
Beam Focusing ◽  
High Reflectivity ◽  
Strong Focusing ◽  
Thin Silicon ◽  
Bent Crystals

AbstractThe strong focusing of neutron beams by reflection from two bent crystals in antiparallel (+, +) setting is discussed. A previous analysis made for thin perfect crystals is extended, by numerical computations, to the case of a thick and mosaic first crystal. It is concluded that microfocusing is also achievable with flat mosaic first crystals. The combination of strong beam focusing onto sample with narrow diffraction lines in a given limited range, which is a requirement in stress scanning, is further examined.Results of test measurements, with a flat mosaic thick silicon as a first crystal and pneumatically bent thin silicon as a second crystal, are presented. The strong focusing of the beam onto sample is confirmed to be compatible with the focusing in scattering. The feasibility of microfocus diffraction on existing three-axis instruments with flat mosaic monochromators is also confirmed. Techniques for plastic bending of high-reflectivity crystals will have to be developed to take full advantage of microfocusing.

scholarly journals Developing a second generation Laue lens prototype: high-reflectivity crystals and accurate assembly

2011 ◽  
Author(s):  
Nicolas M. Barrière ◽  
John A. Tomsick ◽  
Steven E. Boggs ◽  
Alexander Lowell ◽  
Peter von Ballmoos
Keyword(s):  
Second Generation ◽  
High Reflectivity ◽  
Laue Lens

scholarly journals Expected performance of a Laue lens based on bent crystals

2012 ◽  
Author(s):  
Vineeth Valsan ◽  
Filippo Frontera ◽  
Enrico Virgilli ◽  
Vincenzo Liccardo
Keyword(s):  
Laue Lens ◽  
Expected Performance ◽  
Bent Crystals

Thick self-standing bent crystals as optical elements for a Laue lens for applications in astrophysics

2018 ◽  
Vol 46 (2) ◽  
pp. 309-321 ◽  
Author(s):  
Riccardo Camattari ◽  
Marco Romagnoni ◽  
Andrea Mazzolari ◽  
Gianfranco Paternò ◽  
Vincenzo Guidi ◽  
...  
Keyword(s):  
Optical Elements ◽  
Laue Lens ◽  
Bent Crystals

A Cognitive-Linguistic Intervention Program: Basic Concept Formation Level

1977 ◽  
Vol 8 (1) ◽  
pp. 23-32
Author(s):  
Gerald E. Chappell
Keyword(s):  
Basic Concept ◽  
Concept Formation ◽  
Intervention Program ◽  
Cognitive Linguistic ◽  
Basic Concepts ◽  
Linguistic Skills ◽  
Linguistic Intervention

Test-teach questioning is a strategy that can be used to help children develop basic concepts. It fosters the use of multisensory exploration and discovery in learning which leads to the development of cognitive-linguistic skills. This article outlines some of the theoretical bases for this approach and indicates possibilities for their applications in child-clinician transactions.

Prekindergarteners' Performance on The Boehm Test of Basic Concepts

1988 ◽  
Vol 16 ◽  
pp. 137-141 ◽  
Author(s):  
Amelia Ouellette ◽  
Robert Casteel
Keyword(s):  
Basic Concepts
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