scholarly journals Diamond refractive micro-lenses for full-field X-ray imaging and microscopy produced with ion beam lithography

2020 ◽  
Vol 28 (4) ◽  
pp. 4773 ◽  
Author(s):  
Polina Medvedskaya ◽  
Ivan Lyatun ◽  
Sergey Shevyrtalov ◽  
Maxim Polikarpov ◽  
Irina Snigireva ◽  
...  
Keyword(s):  
Ion Beam ◽  
Full Field ◽  
X Ray ◽  
Ion Beam Lithography ◽  
X Ray Imaging

scholarly journals Rapid Prototyping of Fresnel Zone PlatesviaDirect Ga+Ion Beam Lithography for High-Resolution X-ray Imaging

ACS Nano ◽  
2013 ◽  
Vol 7 (11) ◽  
pp. 9788-9797 ◽  
Author(s):  
Kahraman Keskinbora ◽  
Corinne Grévent ◽  
Ulrike Eigenthaler ◽  
Markus Weigand ◽  
Gisela Schütz
Keyword(s):  
High Resolution ◽  
Rapid Prototyping ◽  
Fresnel Zone ◽  
Ion Beam ◽  
X Ray ◽  
Ion Beam Lithography ◽  
X Ray Imaging

X-ray refractive glass microlenses produced by ion beam lithography

2021 ◽  
Author(s):  
Polina Medvedskaya ◽  
Ivan Lyatun ◽  
K. Golubenko ◽  
Vyacheslav Yunkin ◽  
Irina Snigireva ◽  
...  
Keyword(s):  
Ion Beam ◽  
X Ray ◽  
Ion Beam Lithography

Design, development and first experiments on the X-ray imaging beamline at Indus-2 synchrotron source RRCAT, India

2015 ◽  
Vol 22 (6) ◽  
pp. 1531-1539 ◽  
Author(s):  
A. K. Agrawal ◽  
B. Singh ◽  
Y. S. Kashyap ◽  
M. Shukla ◽  
P. S. Sarkar ◽  
...  
Keyword(s):  
Phase Contrast ◽  
Imaging Techniques ◽  
Phase Contrast Imaging ◽  
Design Development ◽  
Contrast Imaging ◽  
Synchrotron Source ◽  
Full Field ◽  
X Ray ◽  
X Ray Imaging ◽  
Micro Tomography

A full-field hard X-ray imaging beamline (BL-4) was designed, developed, installed and commissioned recently at the Indus-2 synchrotron radiation source at RRCAT, Indore, India. The bending-magnet beamline is operated in monochromatic and white beam mode. A variety of imaging techniques are implemented such as high-resolution radiography, propagation- and analyzer-based phase contrast imaging, real-time imaging, absorption and phase contrast tomographyetc. First experiments on propagation-based phase contrast imaging and micro-tomography are reported.

scholarly journals Nondestructive Characterization of Ceramic Composites Used as Combustor Liners in Advanced Gas Turbines

1995 ◽  
Author(s):  
W. A. Ellingson ◽  
S. A. Rothermel ◽  
J. F. Simpson
Keyword(s):  
Gas Turbines ◽  
Thermal Characteristics ◽  
Ceramic Matrix Composites ◽  
Ceramic Composites ◽  
Matrix Composites ◽  
Full Field ◽  
X Ray ◽  
X Ray Imaging ◽  
Combustor Liner ◽  
Nondestructive Characterization

Nondestructive characterization (NDC) methods which can provide full field information about components prior to and during use are critical to the reliable application of continuous fiber ceramic matrix composites in high firing temperature (>1350°C) gas turbines. For combustor liner applications, although nonmechanical load bearing components, thermal characteristics as well as mechanical integrity is vitally important. NDC methods being developed to provide necessary information include x-ray computed tomography (mainly for through-wall density and delamination detection), infrared-based thermal diffusivity imaging, and single-wall through-transmission x-ray imaging (mainly for fiber content and alignment detection). Correlation of the data obtained from NDC methods with subscale combustor liner tests have shown positive results at thermal cycling temperatures from 700°C to 1177°C.

scholarly journals Highly porous nanoberyllium for X-ray beam speckle suppression

2015 ◽  
Vol 22 (3) ◽  
pp. 796-800 ◽  
Author(s):  
Alexander Goikhman ◽  
Ivan Lyatun ◽  
Petr Ershov ◽  
Irina Snigireva ◽  
Pawel Wojda ◽  
...  
Keyword(s):  
Spatial Coherence ◽  
Special Device ◽  
X Rays ◽  
Speckle Structure ◽  
Full Field ◽  
X Ray ◽  
X Ray Imaging ◽  
Phase Amplitude ◽  
Highly Porous ◽  
Effective Source

This paper reports a special device called a `speckle suppressor', which contains a highly porous nanoberyllium plate squeezed between two beryllium windows. The insertion of the speckle suppressor in an X-ray beam allows manipulation of the spatial coherence length, thus changing the effective source size and removing the undesirable speckle structure in X-ray imaging experiments almost without beam attenuation. The absorption of the nanoberyllium plate is below 1% for 1 mm thickness at 12 keV. The speckle suppressor was tested on the ID06 ESRF beamline with X-rays in the energy range from 9 to 15 keV. It was applied for the transformation of the phase–amplitude contrast to the pure amplitude contrast in full-field microscopy.

Nondestructive Characterization of Ceramic Composites Used as Combustor Liners in Advanced Gas Turbines

1996 ◽  
Vol 118 (3) ◽  
pp. 486-490
Author(s):  
W. A. Ellingson ◽  
S. A. Rothermel ◽  
J. F. Simpson
Keyword(s):  
Gas Turbines ◽  
Thermal Characteristics ◽  
Ceramic Matrix Composites ◽  
Ceramic Composites ◽  
Matrix Composites ◽  
Full Field ◽  
X Ray ◽  
X Ray Imaging ◽  
X Ray Computed ◽  
Nondestructive Characterization

Nondestructive characterization (NDC) methods, which can provide full-field information about components prior to and during use, are critical to the reliable application of continuous fiber ceramic matrix composites in high-firing-temperature (>1350°C) gas turbines. [For combustor liners, although they are nonmechanical load-bearing components, both thermal characteristics and mechanical integrity are vitally important.] NDC methods being developed to provide necessary information include x-ray computed tomography (mainly for through-wall density and delamination detection), infrared-based thermal diffusivity imaging, and single-wall through-transmission x-ray imaging (mainly for fiber content and alignment detection). Correlation of the data obtained from NDC methods with subscale combustor liner tests have shown positive results at thermal cycling temperatures from 700°C to 1177°C.

scholarly journals Multiscale X-ray imaging using ptychography

2018 ◽  
Vol 25 (4) ◽  
pp. 1214-1221 ◽  
Author(s):  
Simone Sala ◽  
Venkata S. C. Kuppili ◽  
Stefanos Chalkidis ◽  
Darren J. Batey ◽  
Xiaowen Shi ◽  
...  
Keyword(s):  
Generation X ◽  
Imaging Techniques ◽  
X Rays ◽  
Widespread Application ◽  
Full Field ◽  
X Ray ◽  
X Ray Imaging ◽  
Imaging Mode ◽  
Resolution Imaging ◽  
Complementary Techniques

The success of ptychography and other imaging experiments at third-generation X-ray sources is apparent from their increasingly widespread application and the improving quality of the images they produce both for resolution and contrast and in terms of relaxation of experimental constraints. The wider availability of highly coherent X-rays stimulates the development of several complementary techniques which have seen limited mutual integration in recent years. This paper presents a framework in which some of the established imaging techniques – with particular regard for ptychography – are flexibly applied to tackle the variable requirements occurring at typical synchrotron experiments. In such a framework one can obtain low-resolution images of whole samples and smoothly zoom in on specific regions of interest as they are revealed by switching to a higher-resolution imaging mode. The techniques involved range from full-field microscopy, to reach the widest fields of view (>mm), to ptychography, to achieve the highest resolution (<100 nm), and have been implemented at the I13 Coherence Branchline at Diamond Light Source.

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