4,514 resources related to X-ray scattering
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The conference program will consist of plenary lectures, symposia, workshops and invitedsessions of the latest significant findings and developments in all the major fields of biomedical engineering.Submitted full papers will be peer reviewed. Accepted high quality papers will be presented in oral and poster sessions,will appear in the Conference Proceedings and will be indexed in PubMed/MEDLINE.
2021 IEEE Photovoltaic Specialists Conference (PVSC)
Photovoltaic materials, devices, systems and related science and technology
2020 Joint Conference of the IEEE International Frequency Control Symposium and International Symposium on Applications of Ferroelectrics (IFCS-ISAF)
Ferroelectric materials and applications
IEEE International Conference on Plasma Science (ICOPS) is an annual conference coordinated by the Plasma Science and Application Committee (PSAC) of the IEEE Nuclear & Plasma Sciences Society.
the IEEE/IEDM has been the world's main forum for reporting breakthroughs in technology, design, manufacturing, physics and the modeling of semiconductors and other electronic devices. Topics range from deep submicron CMOS transistors and memories to novel displays and imagers, from compound semiconductor materials to nanotechnology devices and architectures, from micromachined devices to smart -power technologies, etc.
Experimental and theoretical advances in antennas including design and development, and in the propagation of electromagnetic waves including scattering, diffraction and interaction with continuous media; and applications pertinent to antennas and propagation, such as remote sensing, applied optics, and millimeter and submillimeter wave techniques.
Contains articles on the applications and other relevant technology. Electronic applications include analog and digital circuits employing thin films and active devices such as Josephson junctions. Power applications include magnet design as well asmotors, generators, and power transmission
Broad coverage of concepts and methods of the physical and engineering sciences applied in biology and medicine, ranging from formalized mathematical theory through experimental science and technological development to practical clinical applications.
Electrical insulation common to the design and construction of components and equipment for use in electric and electronic circuits and distribution systems at all frequencies.
This publication covers the theory, design, fabrication, manufacturing and application of information displays and aspects of display technology that emphasize the progress in device engineering, device design, materials, electronics, physics and reliabilityaspects of displays and the application of displays.
EQEC'96. 1996 European Quantum Electronic Conference, 1996
Conference on Lasers and Electro-Optics, 2003. CLEO '03., 2003
We have observed the X-ray radiation produced by the nonlinear Thomson scattering of an intense femtosecond laser on relativistic electrons. The 1 J 30 fs laser beam is focussed on a helium gas jet and the X-ray radiation is detected using a grazing incidence X-ray spectrometer. The analysis of the data shows that the effect of the plasma as well ...
Proceedings of the 22nd Annual International Conference of the IEEE Engineering in Medicine and Biology Society (Cat. No.00CH37143), 2000
A theoretical method for identifying optimal X-ray imaging geometry is presented and applied to cone-beam CT (CBCT) using a flat-panel imager (FPI). The method includes the effects of X-ray source distribution, imaging task, X-ray scatter, and detective quantum efficiency (DQE) on the ICRU-recommended figure of merit for image quality-detectability index. Cascaded systems analysis for FPIs is extended to incorporate the ...
2001 Proceedings. 51st Electronic Components and Technology Conference (Cat. No.01CH37220), 2001
X-ray diffraction permits direct and unequivocal identification of crystallographic phases, although conventional low-energy beams penetrate to a depth of only several micrometers. A high-energy X-ray beam (up to 320 keV) easily penetrates through a circuit board and the attached devices, permitting the identification of any intermetallic layers in the interior. Because the diffraction intensity is proportional to the concentration, this ...
2010 3rd International Nanoelectronics Conference (INEC), 2010
Nanoparticles and nanostructured dendritic silver bismuth sulfide were successfully produced from silver acetate, bismuth nitrate, and thiosemicarbarzide in ethylene glycol by 140-200°C solvothermal reactions for 24-72 h. The phase was detected using X-ray diffraction (XRD) and selected area electron diffraction (SAED). Their SAED patterns were also in accordance with those of the simulations. Scanning and transmission electron microscopies (SEM and ...
Larson Collection interview with Rudolph Peierls
ISEC 2013 Special Gordon Donaldson Session: Remembering Gordon Donaldson - 5 of 7 - SQUID Instrumentation for Early Cancer Diagnostics
Kees Immink, 2017 IEEE Medal of Honor
Message from IEEE President Ray
ECCE Plenary: Pedro Ray, part 1
26th Annual MTT-AP Symposium and Mini Show - Ray Pengelly
ECCE Plenary: Pedro Ray, part 2
WIE ILC Short Sessions: Ray Arata - Engaging Men to Advance Women
Hertz-Class Brillouin Lasing with Nanokelvin Thermal Sensing - William Loh - Closing Ceremony, IPC 2018
An IEEE IPC Special Session with X. Chen from Nokia Bell Labs
K. J. Ray Liu - Candidate, IEEE President-Elect 2021
IMS 2011 Microapps - Local Fundamental Frequency Enhancements for X-Parameter Models
HKN Member Ray Kurzweil Receives Award at 2014 EAB Awards Ceremony
IMS 2011 Microapps - Power Amplifier Design Utilizing the NVNA and X-Parameters
MicroApps: 200W RF Power Amplifer Design using a Nonlinear Vector Network Analyzer and Measured Load-Dependent X-Parameters (2) (Agilent Technologies)
2009 IEEE Honors Ceremony
Honda U3-X Personal Mobility Device in NY
X-59 Quiet Supersonic Technology X-Plane - Peter Iosifidis - VIC Summit 2019
Q&A with Dr. K. J. Ray Liu: IEEE Big Data Podcast, Episode 11
We have observed the X-ray radiation produced by the nonlinear Thomson scattering of an intense femtosecond laser on relativistic electrons. The 1 J 30 fs laser beam is focussed on a helium gas jet and the X-ray radiation is detected using a grazing incidence X-ray spectrometer. The analysis of the data shows that the effect of the plasma as well as the additional acceleration of the electrons inside the plasma waves should be taken into account to fit the experimental results.
A theoretical method for identifying optimal X-ray imaging geometry is presented and applied to cone-beam CT (CBCT) using a flat-panel imager (FPI). The method includes the effects of X-ray source distribution, imaging task, X-ray scatter, and detective quantum efficiency (DQE) on the ICRU-recommended figure of merit for image quality-detectability index. Cascaded systems analysis for FPIs is extended to incorporate the effects of X-ray scatter directly into the DQE. For the FPI-CBCT prototype being implemented for image- guided radiotherapy of the prostate, optimal magnification is /spl sim/1.4-1.6, depending primarily on the magnitude of the X-ray scatter fraction.
X-ray diffraction permits direct and unequivocal identification of crystallographic phases, although conventional low-energy beams penetrate to a depth of only several micrometers. A high-energy X-ray beam (up to 320 keV) easily penetrates through a circuit board and the attached devices, permitting the identification of any intermetallic layers in the interior. Because the diffraction intensity is proportional to the concentration, this method might also assess the relative concentration of the intermetallics and thus develop some estimate of their effect on the package reliability. However, the combination of conventional X-ray diffraction concepts with a high-energy beam has not been utilized to a full extent yet, and so merits further investigation. We have demonstrated the concept on some simple specimens that we prepared in our laboratory. Through the presentation of this report, we hope to contact other researchers who are studying fracture through these intermetallics. We would like to evaluate our testbed system on a range of actual industrial intermetallic specimens over the next few years.
Nanoparticles and nanostructured dendritic silver bismuth sulfide were successfully produced from silver acetate, bismuth nitrate, and thiosemicarbarzide in ethylene glycol by 140-200°C solvothermal reactions for 24-72 h. The phase was detected using X-ray diffraction (XRD) and selected area electron diffraction (SAED). Their SAED patterns were also in accordance with those of the simulations. Scanning and transmission electron microscopies (SEM and TEM) revealed the nanostructured products. Their photoluminescence (PL) emissions were detected at the same wavelength of 380 and 420 nm, although they were produced under different conditions.
In this work, fine Gd/sub 2/O/sub 3/:Eu powder was synthesized using a solution-combustion method for high-resolution digital X-ray imaging detectors. The structure of the phosphors was characterized by X-ray diffraction (XRD), high-resolution scanning electron microscopy (HR-SEM). It was possible to obtain fine Gd/sub 2/O/sub 3/:Eu crystallized particles with an average particle size of only 20 nm. The optical properties investigated were photoluminescence emission and excitation spectra, luminescence decay time, and X-ray conversion efficiency. The emission corresponding to the /sup 5/D/sub 0//spl rarr//sup 7/F/sub 2/ transition at 610 nm was dominant, and the Eu/sup 3+/ ions substituted well for the Gd/sup 3+/ sites. Quenching starts at an europium concentration of 8% wt, and the strongest X-ray conversion efficiency was achieved at the phosphor with 5% wt. The mean lifetime of synthesized phosphors is 2.3-2.6 ms.
Amorphous selenium (a-Se) has been proved to have excellent detective quantum efficiency, which suggests that a-Se would provide good image quality that is equivalent to or better than conventional film. We implemented a simulation model using Monte Carlo method to acquire the characteristics of detection material itself, not of whole detection system, to compare with conventional film or screen, and obtained PSF, LSF and MTF of photon absorption in /spl alpha/-Se relative to X-ray energy, thickness, and so on. First, we translated XCOM front Fortran into C++ language, which was needed to generate cross sections and attenuation coefficients to obtain path length and interaction type of photons. Using Monte Carlo simulation codes in Visual C++ incorporated with this program, total cross sections, attenuation coefficients, partial cross sections for incoherent and coherent scatterings, photoelectric absorption and pair production were obtained for photons with energy between 1keV and 100GeV. The Monte Carlo simulation codes developed in this study allowed the users to select a random number generator among four suggested ones in Numerical Recipes in C. Based on three interaction types occurring for photons in energy range of diagnostic X-ray (1-100keV), we estimated the position of interaction and the direction of scattered photons in /spl alpha/-Se. Via Fourier transformation of PSF and LSF, we obtained MTF. Density and thickness of a-Se detector was 4.26g/cm3 and 300 /spl mu/m, respectively, and number of induced photons was 100,000. The percentage of absorbed photons in induced direction was 99.8% for 5keV and 86.4% in 30keV photons. Probability of interaction became higher for lower energy photon and in thicker a-Se.
A preliminary experiment has executed using a highly sensitive HPGe detector with spectral resolution, and it demonstrated that the subtraction of two images obtained from different scatter angles yielded a specific material distribution. To get a more exact image, a new system is designed with a scintillator-CCD detector which can correct the attenuation of incident and scattered beams by transmission CT obtained simultaneously. The proposed system can detect wide angle coherent scattered and transmitted X-rays with high spatial resolution by the same detector.
We present a new system architecture for X-ray computed tomography (CT). A multi-source inverse-geometry CT scanner is composed of a large distributed X-ray source with an array of discrete electron emitters and focal spots, and a high frame-rate flat-panel X-ray detector. In this work we study the advantages and the challenges of this new architecture. We predict potential breakthroughs in volumetric coverage, dose efficiency, and spatial resolution. We also present experimental results obtained with a universal benchtop system.
Novel short-pulse X-ray sources, e.g., laser-produced plasmas, offer new approaches to the solution of the scatter-reduction problem in X-ray imaging, by the use of time-gated detection techniques. Monte Carlo simulations are used to estimate the scatter-reduction performance of time-gated imaging techniques within a range of X-ray energies, gating times and tissue parameters. Significant improvements can be achieved for thick tissues combined with high photon energies. Experimental studies on water phantoms are performed using a laser-produced plasma X-ray source. Problems arising on the technical realization are discussed.
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