scholarly journals Focal spot deblurring for high resolution direct conversion x-ray detectors

2016 ◽  
Author(s):  
S. V. Setlur Nagesh ◽  
R. Rana ◽  
M. Russ ◽  
Ciprian N. Ionita ◽  
D. R. Bednarek ◽  
...  
Keyword(s):  
High Resolution ◽  
Focal Spot ◽  
Direct Conversion ◽  
X Ray

scholarly journals XUV and Soft X-Ray Radiation from Laser Produced Plasmas as Laboratory Spectroscopic Sources

1984 ◽  
Vol 86 ◽  
pp. 212-212
Author(s):  
P. Gohil ◽  
M.L. Ginter ◽  
T.J. McIlrath ◽  
H. Kapoor ◽  
D. Ma ◽  
...  
Keyword(s):  
High Resolution ◽  
Laser Beam ◽  
Spectral Region ◽  
Focal Spot ◽  
Laser Energy ◽  
Diffraction Limit ◽  
High Resolution Spectroscopy ◽  
Diode Array ◽  
X Ray ◽  
Pin Photodiode

Laser produced plasmas have been shown to be excellent sources for applications in the XUV and soft X-ray spectral region. We are using a 550 mj, 25 ns (FWHM) ND:YAG laser operating at a repetition rate of 10 Hz to produce plasmas above rotatable solid targets. The focal spot of the laser beam with a 31 cm lens was measured to be 170 μm (approximately twice the diffraction limit), using a diode array having a 170 μm resolution. Broadband output in the soft X-ray region was studied using a windowless PIN photodiode with an A1203 surface covered with a polyethylene filter with transmission between 44 Å and 120 Å. Results are presented for the source’s soft X-ray intensity for several elements as a function of laser energy, focus and driving wavelength, as are preliminary results using the source for high resolution spectroscopy and for soft X-ray lithography.

Ultra-Small Focal Spot X-Ray Sources for High Resolution Digital Mammography

1998 ◽  
pp. 43-46
Author(s):  
Andrzej Krol ◽  
Walter Huda ◽  
Craig C. Chamberlain ◽  
Jean-Claude Kieffer ◽  
Zhiming Jiang ◽  
...  
Keyword(s):  
High Resolution ◽  
Digital Mammography ◽  
Focal Spot ◽  
X Ray

Development of a novel high-resolution direct conversion x-ray detector

2000 ◽  
Author(s):  
Eric L. Gingold ◽  
Denny L. Y. Lee ◽  
Lothar S. Jeromin ◽  
Brian G. Rodricks ◽  
Michael G. Hoffberg ◽  
...  
Keyword(s):  
High Resolution ◽  
Direct Conversion ◽  
X Ray

Electron microscopy of rabbit FC crystals

1983 ◽  
Vol 41 ◽  
pp. 730-731
Author(s):  
Robert A. Grant ◽  
Laura L. Degn ◽  
Wah Chiu ◽  
John Robinson
Keyword(s):  
Electron Microscopy ◽  
High Resolution ◽  
High Resolution Electron Microscopy ◽  
Molecular Replacement ◽  
X Ray ◽  
X Ray Crystallography ◽  
Resolution Electron ◽  
Replacement Technique ◽  
Hydrated Crystal ◽  
Molecular Structure Analysis

Proteolytic digestion of the immunoglobulin IgG with papain cleaves the molecule into an antigen binding fragment, Fab, and a compliment binding fragment, Fc. Structures of intact immunoglobulin, Fab and Fc from various sources have been solved by X-ray crystallography. Rabbit Fc can be crystallized as thin platelets suitable for high resolution electron microscopy. The structure of rabbit Fc can be expected to be similar to the known structure of human Fc, making it an ideal specimen for comparing the X-ray and electron crystallographic techniques and for the application of the molecular replacement technique to electron crystallography. Thin protein crystals embedded in ice diffract to high resolution. A low resolution image of a frozen, hydrated crystal can be expected to have a better contrast than a glucose embedded crystal due to the larger density difference between protein and ice compared to protein and glucose. For these reasons we are using an ice embedding technique to prepare the rabbit Fc crystals for molecular structure analysis by electron microscopy.

High Resolution Study of Polytypism: Application to SiC and Au3 Mn

1982 ◽  
Vol 40 ◽  
pp. 540-541
Author(s):  
G. Van Tendeloo ◽  
J. Van Landuyt ◽  
S. Amelinckx
Keyword(s):  
Electron Microscopy ◽  
High Resolution ◽  
Stacking Sequence ◽  
X Ray ◽  
Powerful Technique ◽  
Resolution Study ◽  
The Ideal

Polytypism has been studied for a number of years and a wide variety of stacking sequences has been detected and analysed. SiC is the prototype material in this respect; see e.g. Electron microscopy under high resolution conditions when combined with x-ray measurements is a very powerful technique to elucidate the correct stacking sequence or to study polytype transformations and deviations from the ideal stacking sequence.

A High Resolution Study of G.P. Zones in Aluminum - 4.2 at % Silver

1982 ◽  
Vol 40 ◽  
pp. 722-723 ◽  
Author(s):  
R. Gronsky
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
High Resolution ◽  
Computer Simulations ◽  
Structural Characteristics ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Resolution Study

The phenomenon of clustering in Al-Ag alloys has been extensively studied since the early work of Guinierl, wherein the pre-precipitation state was characterized as an assembly of spherical, ordered, silver-rich G.P. zones. Subsequent x-ray and TEM investigations yielded results in general agreement with this model. However, serious discrepancies were later revealed by the detailed x-ray diffraction - based computer simulations of Gragg and Cohen, i.e., the silver-rich clusters were instead octahedral in shape and fully disordered, atleast below 170°C. The object of the present investigation is to examine directly the structural characteristics of G.P. zones in Al-Ag by high resolution transmission electron microscopy.

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