Hard x-ray imaging of laser plasmas using medical technology

1981 ◽  
Vol 20 (21) ◽  
pp. 3704 ◽  
Author(s):  
Paul D. Rockett ◽  
David B. van Hulsteyn ◽  
William Priedhorsky
Keyword(s):  
Medical Technology ◽  
X Ray ◽  
Laser Plasmas ◽  
X Ray Imaging

scholarly journals Measurement of Carbon Ion Photoabsorption Cross Sections Using Laser Plasmas

1990 ◽  
Vol 115 ◽  
pp. 53-56
Author(s):  
B. Wargelin ◽  
S.M. Kahn ◽  
W. Craig ◽  
R. London
Keyword(s):  
Cross Sections ◽  
Grazing Incidence ◽  
X Rays ◽  
Carbon Ion ◽  
X Ray ◽  
Laser Plasmas ◽  
X Ray Imaging ◽  
Low Temperature Plasmas ◽  
Ion Species ◽  
High Column

AbstractLaser plasmas are well-suited to studies of ionic photoabsorption because they can provide highly ionized, low temperature plasmas of high column density, as well as bright, compact continuum X-ray sources which can illuminate the plasma under study. In our experiment, continuum X-rays from a gold laser plasma are partially absorbed as they traverse a carbon plasma and are then dispersed by a grazing incidence reflection grating. An X-ray imaging camera records both the absorbed and unabsorbed spectra simultaneously for later computer analysis to determine the photoabsorption cross sections for each carbon ion species.

Coding Aperture Applied To X-Ray Imaging Of Laser-Plasmas

1983 ◽  
Author(s):  
N. Fleurot ◽  
J. P. Gex ◽  
R. Sauneuf ◽  
N. de Beaucoudray
Keyword(s):  
X Ray ◽  
Laser Plasmas ◽  
X Ray Imaging

Tomographic X-Ray Imaging Of Laser Plasmas By Multislit Coding And Charge Coupled Devices (C.C.D) Detectors.

1988 ◽  
Author(s):  
N. de Beaucoudrey ◽  
L. Garnero ◽  
J. P. Hugonin ◽  
A. Bellemain ◽  
S. Lowenthal
Keyword(s):  
X Ray ◽  
Laser Plasmas ◽  
X Ray Imaging ◽  
Charge Coupled Devices

Characterization of a spherically bent quartz crystal for Kα x-ray imaging of laser plasmas using a focusing monochromator geometry

2011 ◽  
Vol 6 (03) ◽  
pp. T03002-T03002 ◽  
Author(s):  
N L Kugland ◽  
C G Constantin ◽  
T Döppner ◽  
P Neumayer ◽  
S H Glenzer ◽  
...  
Keyword(s):  
Quartz Crystal ◽  
X Ray ◽  
Laser Plasmas ◽  
X Ray Imaging

Low-energy x-ray imaging of laser plasmas

1981 ◽  
Vol 6 (4) ◽  
pp. 196 ◽  
Author(s):  
Ping Lee ◽  
D. B. van Hulsteyn ◽  
A. Hauer ◽  
S. Whitehill
Keyword(s):  
Low Energy ◽  
X Ray ◽  
Laser Plasmas ◽  
X Ray Imaging

Diagnostics of Gold Laser Plasmas

1988 ◽  
Vol 102 ◽  
pp. 357-360
Author(s):  
J.C. Gauthier ◽  
J.P. Geindre ◽  
P. Monier ◽  
C. Chenais-Popovics ◽  
N. Tragin ◽  
...  
Keyword(s):  
Experimental Results ◽  
Pure Gold ◽  
Electronic Temperature ◽  
X Ray ◽  
Laser Plasmas ◽  
Collisional Radiative Model ◽  
Radiative Model

AbstractIn order to achieve a nickel-like X ray laser scheme we need a tool to determine the parameters which characterise the high-Z plasma. The aim of this work is to study gold laser plasmas and to compare experimental results to a collisional-radiative model which describes nickel-like ions. The electronic temperature and density are measured by the emission of an aluminium tracer. They are compared to the predictions of the nickel-like model for pure gold. The results show that the density and temperature can be estimated in a pure gold plasma.

Defects of Platelet Function Recognized by X-Ray Imaging and Scanning Electron Microscopy

1985 ◽  
Vol 43 ◽  
pp. 610-613
Author(s):  
M.G. Baldini ◽  
S. Morinaga ◽  
D. Minasian ◽  
R. Feder ◽  
D. Sayre ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Cell Biology ◽  
Imaging Technique ◽  
Human Platelets ◽  
X Rays ◽  
X Ray ◽  
X Ray Imaging ◽  
Complex Phenomena ◽  
Scanning Electron

Contact X-ray imaging is presently developing as an important imaging technique in cell biology. Our recent studies on human platelets have demonstrated that the cytoskeleton of these cells contains photondense structures which can preferentially be imaged by soft X-ray imaging. Our present research has dealt with platelet activation, i.e., the complex phenomena which precede platelet appregation and are associated with profound changes in platelet cytoskeleton. Human platelets suspended in plasma were used. Whole cell mounts were fixed and dehydrated, then exposed to a stationary source of soft X-rays as previously described. Developed replicas and respective grids were studied by scanning electron microscopy (SEM).

Designing high-resolution slow scan CCD-based TEM camera systems

1992 ◽  
Vol 50 (2) ◽  
pp. 946-947
Author(s):  
James F. Mancuso ◽  
William B. Maxwell ◽  
Russell E. Camp ◽  
Mark H. Ellisman
Keyword(s):  
Fiber Optics ◽  
Ccd Camera ◽  
High Energy ◽  
Phosphor Layer ◽  
X Ray ◽  
Light Production ◽  
Camera Systems ◽  
X Ray Imaging ◽  
Electron Image ◽  
Scintillating Fiber

The imaging requirements for 1000 line CCD camera systems include resolution, sensitivity, and field of view. In electronic camera systems these characteristics are determined primarily by the performance of the electro-optic interface. This component converts the electron image into a light image which is ultimately received by a camera sensor.Light production in the interface occurs when high energy electrons strike a phosphor or scintillator. Resolution is limited by electron scattering and absorption. For a constant resolution, more energy deposition occurs in denser phosphors (Figure 1). In this respect, high density x-ray phosphors such as Gd2O2S are better than ZnS based cathode ray tube phosphors. Scintillating fiber optics can be used instead of a discrete phosphor layer. The resolution of scintillating fiber optics that are used in x-ray imaging exceed 20 1p/mm and can be made very large. An example of a digital TEM image using a scintillating fiber optic plate is shown in Figure 2.

Ionic homeostasis and subcellular element compartmentation

1990 ◽  
Vol 48 (2) ◽  
pp. 150-151
Author(s):  
Ann LeFurgey ◽  
Peter Ingram ◽  
J.J. Blum ◽  
M.C. Carney ◽  
L.A. Hawkey ◽  
...  
Keyword(s):  
Leishmania Major ◽  
Ionic Homeostasis ◽  
X Ray ◽  
Functional Studies ◽  
Cell Compartments ◽  
X Ray Imaging ◽  
Resolution Electron ◽  
Multiple Cell ◽  
Role Of Zn

Subcellular compartments commonly identified and analyzed by high resolution electron probe x-ray microanalysis (EPXMA) include mitochondria, cytoplasm and endoplasmic or sarcoplasmic reticulum. These organelles and cell regions are of primary importance in regulation of cell ionic homeostasis. Correlative structural-functional studies, based on the static probe method of EPXMA combined with biochemical and electrophysiological techniques, have focused on the role of these organelles, for example, in maintaining cell calcium homeostasis or in control of excitation-contraction coupling. New methods of real time quantitative x-ray imaging permit simultaneous examination of multiple cell compartments, especially those areas for which both membrane transport properties and element content are less well defined, e.g. nuclei including euchromatin and heterochromatin, lysosomes, mucous granules, storage vacuoles, microvilli. Investigations currently in progress have examined the role of Zn-containing polyphosphate vacuoles in the metabolism of Leishmania major, the distribution of Na, K, S and other elements during anoxia in kidney cell nuclel and lysosomes; the content and distribution of S and Ca in mucous granules of cystic fibrosis (CF) nasal epithelia; the uptake of cationic probes by mltochondria in cultured heart ceils; and the junctional sarcoplasmic retlculum (JSR) in frog skeletal muscle.

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